PCI9052G - PLX Technology, Inc. - Datasheet.Directory

PCI 9052 Data Book

Version 2.0

September 2001

Website: http://www.plxtech.com

Email: apps@plxtech.com

Phone: 408 774-9060

800 759-3735

FAX: 408 774-2169

PLX Technology, Inc. retains the right to make changes to this product at any time, without notice. Products may

have minor variations to this publication, known as errata. PLX assumes no liability whatsoever, including

infringement of any patent or copyright, for sale and use of PLX products.

PLX Technology and the PLX logo are registered trademarks and PLXMon is a trademark of PLX Technology, Inc.

Other brands and names are property of their respective owners.

Order Number: 9052-SIL-DB-P1-2.0

Printed in the USA, September 2001

PCI 9052 Data Book, Version 2.0

Contents

Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix

Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi

Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii

Timing Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv

Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii

Supplemental Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii

Terms and Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii

Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii

1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

1.1. Company and Product Background . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

1.2. General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

1.3. PCI 9052 Major Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

1.4. PCI 9052 and PCI 9050 Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

1.4.1. PCI 9052 New Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

1.4.2. Errata . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

1.4.2.1. PCI 9050 Issues Resolved in PCI 9052 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

1.4.2.2. PCI 9052 Issues Not Present in PCI 9050 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

1.4.3. Signaling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

1.4.3.1. PCI Bus. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

1.4.3.2. Local Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

1.4.3.3. Pull-Up and Pull-Down Resistor Recommendations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

1.5. PCI 9052 Comparison with Other PLX Chips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

2. Bus Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2.1. PCI Bus. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2.1.1. PCI Bus Interface and Bus Cycles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2.1.1.1. PCI Target (Direct Slave) Command Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2.1.1.2. Wait States—PCI Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2.1.1.3. PCI Bus Little Endian Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2.1.1.4. PCI Prefetchable Memory Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2.1.1.5. PCI Target (Direct Slave) Accesses to an 8- or 16-Bit Local Bus Device. . . . . . . . . . . . . . . . . . . . . 2-2

2.2. Local Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

2.2.1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

2.2.1.1. Transactions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

2.2.1.2. Basic Bus States. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

2.2.2. Local Bus Signals Used in Timing Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

2.2.3. Local Bus Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

2.2.3.1. Clock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

2.2.3.2. Address/Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

2.2.3.2.1. LA[27:2] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

2.2.3.2.2. LAD[31:0] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

2.2.3.3. Control/Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

2.2.3.3.1. ADS#, ALE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

2.2.3.3.2. LBE[3:0]# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

2.2.3.3.3. LLOCKo# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Contents

PCI 9052 Data Book, Version 2.0

2.2.3.3.4. LRDYi# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

2.2.3.3.5. LW/R# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

2.2.3.3.6. RD# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

2.2.3.3.7. WAITO# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

2.2.3.3.8. WR# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

2.2.3.4. Local Bus Arbitration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

2.2.3.4.1. LHOLD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

2.2.3.4.2. LHOLDA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

2.2.4. Local Bus Interface and Bus Cycles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

2.2.4.1. Bus Cycles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

2.2.4.2. Wait State Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

2.2.4.2.1. Internal Wait State Generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

2.2.4.2.2. Ready Signaling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

2.2.4.3. Burst Mode and Continuous Burst Mode (Bterm “Burst Terminate” Mode) . . . . . . . . . . . . . . . . . . . 2-8

2.2.4.3.1. Burst and Bterm Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

2.2.4.3.2. Burst-4 Lword Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

2.2.4.3.2.1. Continuous Burst Mode (Bterm “Burst Terminate” Mode) . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

2.2.4.3.3. Partial Lword Accesses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

2.2.4.4. Recovery States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

2.2.4.5. Local Bus Read Accesses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

2.2.4.6. Local Bus Write Accesses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

2.2.5. Local Bus Big/Little Endian Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

2.2.5.1. 32-Bit Local Bus—Big Endian Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

2.2.5.2. 16-Bit Local Bus—Big Endian Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

2.2.5.3. 8-Bit Local Bus—Big Endian Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

2.3. Arbitration Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

3. Reset and Serial EEPROM Initialization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

3.1. Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

3.2. Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

3.2.1. PCI Bus RST# Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

3.2.2. Software Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

3.2.3. Local Bus Output LRESET# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

3.3. Serial EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

3.3.1. Serial EEPROM Load Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

3.3.1.1. Serial EEPROM Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

3.3.1.2. Recommended Serial EEPROMs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

3.4. Internal Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

3.4.1. PCI Configuration Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

3.4.2. PCI Bus Access to Internal Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

3.5. Timing Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

4. Direct Slave Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4.1. Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4.2. Direct Data Transfer Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4.2.1. Direct Slave Operation (PCI Master-to-Local Bus Access) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4.2.1.1. Direct Slave Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4.2.1.2. PCI r2.1 Features Enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

4.2.1.2.1. Direct Slave Delayed Read Mode Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

4.2.1.2.2. 32000 PCI Clock Timeout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

4.2.1.2.3. PCI r2.1 16- and 8-Clock Rule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

4.2.1.3. Direct Slave Read Ahead Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

4.2.1.4. Direct Slave Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

4.2.1.5. Direct Slave PCI-to-Local Address Mapping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

4.2.1.5.1. Direct Slave Local Bus Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

4.2.1.5.2. Direct Slave Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

4.2.1.5.3. Direct Slave Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

Contents

PCI 9052 Data Book, Version 2.0

4.2.1.5.4. Direct Slave Byte Enables (Non-Multiplexed Mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

4.2.1.5.5. Direct Slave Byte Enables (Multiplexed Mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

4.3. Response to FIFO Full or Empty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

4.4. Timing Diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

4.4.1. Serial EEPROM and Configuration Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

4.4.2. Non-Multiplexed Mode Local Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17

4.4.3. Big Endian Mode and Multiplexed Mode Local Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-37

5. ISA Interface Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

5.1. Architecture. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

5.2. Pin Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

5.2.1. LRESET#/LRESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

5.2.2. CS0#/MEMRD# and

CS1#/MEMWR# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

5.2.3. USER0/WAITO#/IORD# and USER1/LLOCKo#/IOWR# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

5.2.4. ALE/BALE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

5.2.5. NC/CHRDY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

5.2.6. NC/NOWS# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

5.2.7. Other Local Bus Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

5.3. Configuring Local Registers for ISA Interface Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

5.4. Design Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

5.4.1. Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

5.4.2. Address and Control Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

5.4.3. Ready Signaling Protocol and Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

5.4.3.1. Legacy ISA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

5.4.3.2. ISA Interface Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

5.4.3.2.1. NOWS# Input Sampling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

5.5. Timing Diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

6. Local Chip Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

6.1. Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

6.2. Chip Select Base Address Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

6.3. Procedure for Using Chip Select Base Address Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

6.3.1. Chip Select Base Address Register Programming Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

6.4. Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

7. PCI/Local Interrupts and User I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

7.1. Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

7.2. Interrupts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

7.2.1. PCI Interrupts (INTA#) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

7.2.2. Local Interrupt Input (LINTi[2:1]) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

7.2.3. All Modes PCI SERR# (PCINMI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

7.3. User I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

7.4. Timing Diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3

8. Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

8.1. Register Address Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

8.2. PCI Configuration Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3

8.3. Local Configuration Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-11

8.3.1. Chip Select Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-22

8.3.2. Control Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-24

Contents

PCI 9052 Data Book, Version 2.0

9. Pin Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

9.1. Pin Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

9.2. Pull-Up/Pull-Down Resistor Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

9.2.1. Input Pins (Pin Type I) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

9.2.2. Output Pins (Pin Type O) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2

9.2.3. I/O Pins (Pin Type I/O) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2

9.3. Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4

10. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1

10.1. General Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1

10.2. Local Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-2

10.3. Local Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-3

11. Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1

11.1. Mechanical Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1

11.2. Typical Adapter Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-2

11.3. Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-4

A. General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

A.1. Ordering Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

A.2. United States and International Representatives, and Distributors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

A.3. Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Index-1

PCI 9052 Data Book, Version 2.0

FIGURES

1-1. PCI 9052 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

2-1. Local Bus Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

2-2. PCI 9052 Single Cycle Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

2-3. PCI 9052 Single Cycle Read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

2-4. Wait States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

2-5. Big/Little Endian—32-Bit Local Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

2-6. Big/Little Endian—16-Bit Local Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

2-7. Big/Little Endian—8-Bit Local Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

3-1. Serial EEPROM Memory Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

4-1. Direct Slave Delayed Read Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

4-2. Direct Slave Read Ahead Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

4-3. Direct Slave Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

4-4. Direct Slave Read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

4-5. Local Bus Direct Slave Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

5-1. Circuit for Delaying NOWS# Recognition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

6-1. Chip Select Base Address and Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

6-2. Memory Map Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

7-1. Interrupt and Error Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

10-1. PCI 9052 Local Input Setup and Hold Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-2

10-2. PCI 9052 Local Output Delay (Min/Max) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-3

10-3. PCI 9052 ALE Output Delay (Min/Max) to the Local Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-4

10-4. PCI 9052 BALE Output Delay (Min/Max) to the Local Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-4

11-1. Mechanical Dimensions and Package Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1

11-2. PCI 9052 Adapter Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-2

11-3. Pin Assignments, Non-Multiplexed and Multiplexed Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-4

11-4. Pin Assignments, ISA and Non-Multiplexed/ISA Interface Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-5

PCI 9052 Data Book, Version 2.0

TABLES

Supplemental Documentation Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii

Data Assignment Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii

1-1. Resistor Recommendations for PCI 9052 and PCI 9050 Input Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

1-2. Resistor Recommendations for PCI 9052 and PCI 9050 Output Pins . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

1-3. Resistor Recommendations for PCI 9052 and PCI 9050 I/O Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

1-4. PCI 9030, PCI 9050, and PCI 9052 Comparison . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

2-1. Direct Slave Command Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2-2. PCI Bus Little Endian Byte Lanes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2-3. LRDYi# Data Transfers, with PCI 9052 as Master Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4

2-4. Local Bus Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

2-5. Local Address Space Bus Region Descriptor Internal Wait States . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

2-6. Burst and Bterm on the Local Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

2-7. Burst-4 Lword Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

2-8. Direct Slave Single and Burst Reads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

2-9. Big/Little Endian Byte Number and Lane Cross-Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

2-10. Lword Lane Transfer—32-Bit Local Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

2-11. Upper Word Lane Transfer—16-Bit Local Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

2-12. Lower Word Lane Transfer—16-Bit Local Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

2-13. Upper Byte Lane Transfer—8-Bit Local Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

2-14. Lower Byte Lane Transfer—8-Bit Local Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

3-1. Serial EEPROM Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

3-2. Serial EEPROM Register Load Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

4-1. Response to FIFO Full or Empty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

5-1. ISA and Non-ISA Interface Mode Pin Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

5-2. Pin Functionality in ISA Interface Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

5-3. INTCSR Register Settings in ISA Interface Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

5-4. CNTRL Register Serial EEPROM Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

5-5. LAS0RR and LAS1RR Register Serial EEPROM Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

5-6. LAS0BRD and LAS1BRD Register Serial EEPROM Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

6-1. Chip Select Base Address Register Signal Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1

8-1. PCI Configuration Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

8-2. Local Configuration Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2

9-1. Pin Type Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

9-2. Input Pin Pull-Up and Pull-Down Resistor Recommendation Summary . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

9-3. Output Pin Pull-Up and Pull-Down Resistor Recommendation Summary . . . . . . . . . . . . . . . . . . . . . . . 9-2

9-4. I/O Pin Pull-Up and Pull-Down Resistor Recommendation Summary . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2

9-5. Power, Ground, and Unused Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4

9-6. Serial EEPROM Interface Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4

9-7. PCI System Bus Interface Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5

9-8. Local Bus Support Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-6

9-9. Mode-Independent Local Bus Data Transfer Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-9

9-10. Mode-Dependent Local Bus Data Transfer Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-10

9-11. ISA Local Bus Data Transfer Pins (Non-Multiplexed Mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-12

Tables

PCI 9052 Data Book, Version 2.0

10-1. Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1

10-2. Operating Ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1

10-3. Capacitance (Sample Tested Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1

10-4. Package Thermal Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1

10-5. Electrical Characteristics over Operating Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-2

10-6. Clock Frequencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-2

10-7. AC Electrical Characteristics (Local Outputs) Measured over Operating Range . . . . . . . . . . . . . . . . 10-3

PCI 9052 Data Book, Version 2.0

REGISTERS

8-1. (PCIIDR; 00h) PCI Configuration ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3

8-2. (PCICR; 04h) PCI Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3

8-3. (PCISR; 06h) PCI Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4

8-4. (PCIREV; 08h) PCI Revision ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4

8-5. (PCICCR; 09-0Bh) PCI Class Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4

8-6. (PCICLSR; 0Ch) PCI Cache Line Size. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5

8-7. (PCILTR; 0Dh) PCI Bus Latency Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5

8-8. (PCIHTR; 0Eh) PCI Header Type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5

8-9. (PCIBISTR; 0Fh) PCI Built-In Self Test (BIST). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5

8-10. (PCIBAR0; 10h) PCI Base Address 0 for Memory Accesses to Local Configuration Registers. . . . . . 8-6

8-11. (PCIBAR1; 14h) PCI Base Address 1 for I/O Accesses to Local Configuration Registers. . . . . . . . . . 8-6

8-12. (PCIBAR2; 18h) PCI Base Address 2 for Accesses to Local Address Space 0. . . . . . . . . . . . . . . . . . 8-7

8-13. (PCIBAR3; 1Ch) PCI Base Address 3 for Accesses to Local Address Space 1 . . . . . . . . . . . . . . . . . 8-7

8-14. (PCIBAR4; 20h) PCI Base Address 4 for Accesses to Local Address Space 2. . . . . . . . . . . . . . . . . . 8-8

8-15. (PCIBAR5; 24h) PCI Base Address 5 for Accesses to Local Address Space 3 . . . . . . . . . . . . . . . . . 8-8

8-16. (PCICIS; 28h) PCI Cardbus Information Structure Pointer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9

8-17. (PCISVID; 2Ch) PCI Subsystem Vendor ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9

8-18. (PCISID; 2Eh) PCI Subsystem ID. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9

8-19. (PCIERBAR; 30h) PCI Expansion ROM Base Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9

8-20. (PCIILR; 3Ch) PCI Interrupt Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10

8-21. (PCIIPR; 3Dh) PCI Interrupt Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10

8-22. (PCIMGR; 3Eh) PCI Minimum Grant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10

8-23. (PCIMLR; 3Fh) PCI Maximum Latency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10

8-24. (LAS0RR; 00h) Local Address Space 0 Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-11

8-25. (LAS1RR; 04h) Local Address Space 1 Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-12

8-26. (LAS2RR; 08h) Local Address Space 2 Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-13

8-27. (LAS3RR; 0Ch) Local Address Space 3 Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-14

8-28. (EROMRR; 10h) Expansion ROM Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-14

8-29. (LAS0BA; 14h) Local Address Space 0 Local Base Address (Remap) . . . . . . . . . . . . . . . . . . . . . . . 8-15

8-30. (LAS1BA; 18h) Local Address Space 1 Local Base Address (Remap) . . . . . . . . . . . . . . . . . . . . . . . 8-15

8-31. (LAS2BA; 1Ch) Local Address Space 2 Local Base Address (Remap) . . . . . . . . . . . . . . . . . . . . . . . 8-16

8-32. (LAS3BA; 20h) Local Address Space 3 Local Base Address (Remap) . . . . . . . . . . . . . . . . . . . . . . . 8-16

8-33. (EROMBA; 24h) Expansion ROM Local Base Address (Remap). . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-16

8-34. (LAS0BRD; 28h) Local Address Space 0 Bus Region Descriptors . . . . . . . . . . . . . . . . . . . . . . . . . . 8-17

8-35. (LAS1BRD; 2Ch) Local Address Space 1 Bus Region Descriptors . . . . . . . . . . . . . . . . . . . . . . . . . . 8-18

8-36. (LAS2BRD; 30h) Local Address Space 2 Bus Region Descriptors . . . . . . . . . . . . . . . . . . . . . . . . . . 8-19

8-37. (LAS3BRD; 34h) Local Address Space 3 Bus Region Descriptors . . . . . . . . . . . . . . . . . . . . . . . . . . 8-20

8-38. (EROMBRD; 38h) Expansion ROM Bus Region Descriptors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-21

8-39. (CS0BASE; 3Ch) Chip Select 0 Base Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-22

8-40. (CS1BASE; 40h) Chip Select 1 Base Address. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-22

8-41. (CS2BASE; 44h) Chip Select 2 Base Address. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-23

8-42. (CS3BASE; 48h) Chip Select 3 Base Address. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-23

8-43. (INTCSR; 4Ch) Interrupt Control/Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-24

8-44. (CNTRL; 50h) User I/O, Direct Slave Response, Serial EEPROM,

and Initialization Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-25

PCI 9052 Data Book, Version 2.0

TIMING DIAGRAMS

2-1. PCI 9052 Local Bus Arbitration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

3-1. Initialization from Serial EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

3-2. PCI RST# Asserting Local Output LRESET# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

4-1. PCI 9052 Local Bus Arbitration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

4-2. PCI RST# Asserting Local Output LRESET# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

4-3. Initialization from Serial EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

4-4. PCI Configuration Write to PCI Configuration Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10

4-5. PCI Configuration Read from PCI Configuration Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10

4-6. PCI Memory Write to Local Configuration Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11

4-7. PCI Memory Read from Local Configuration Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11

4-8. Local Level-Triggered LINTi/LINTi2 Asserting PCI Output INTA# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12

4-9. Local Edge-Triggered Interrupt Asserting PCI Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-13

4-10. USER[3:0] as Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14

4-11. USER[3:0] as Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15

4-12. Chip Select [3:0]# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16

4-13. Non-Multiplexed Mode, Direct Slave Single Write without Wait States (32-Bit Local Bus) . . . . . . . . . . . . . . . . . . 4-17

4-14. Non-Multiplexed Mode, Direct Slave Single Read without Wait States (32-Bit Local Bus) . . . . . . . . . . . . . . . . . . 4-18

4-15. Non-Multiplexed Mode, Direct Slave Single Read with External (LRDYi#) Wait States (32-Bit Local Bus) . . . . . 4-19

4-16. Non-Multiplexed Mode, Direct Slave Non-Burst Write with Wait States (32-Bit Local Bus) . . . . . . . . . . . . . . . . .4-20

4-17. Non-Multiplexed Mode, Direct Slave Non-Burst Write (8-Bit Local Bus) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21

4-18. Non-Multiplexed Mode, Direct Slave Non-Burst Read (32-Bit Local Bus) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-22

4-19. Non-Multiplexed Mode, Direct Slave Non-Burst Read with Unaligned PCI Address (16-Bit Local Bus) . . . . . . . 4-23

4-20. Non-Multiplexed Mode, Direct Slave Non-Burst Read with Prefetch (16-Bit Local Bus) . . . . . . . . . . . . . . . . . . . 4-24

4-21. Non-Multiplexed Mode, Direct Slave Non-Burst Read with Continuous Prefetch (8-Bit Local Bus) . . . . . . . . . . . 4-25

4-22. Non-Multiplexed Mode, Direct Slave Burst Write with Delayed Local Bus (32-Bit Local Bus) . . . . . . . . . . . . . . . 4-26

4-23. Non-Multiplexed Mode, Direct Slave Burst Write with Wait States (16-Bit Local Bus) . . . . . . . . . . . . . . . . . . . . . 4-27

4-24. Non-Multiplexed Mode, Direct Slave Burst Write with BTERM# Disabled and Wait States (32-Bit Local Bus) . . 4-28

4-25. Non-Multiplexed Mode, Direct Slave Burst Write with BTERM# Enabled (32-Bit Local Bus) . . . . . . . . . . . . . . . . 4-29

4-26. Non-Multiplexed Mode, Direct Slave Burst Write with BTERM# Enabled (8-Bit Local Bus) . . . . . . . . . . . . . . . . 4-30

4-27. Non-Multiplexed Mode, Direct Slave Burst Read with Prefetch of Four Lwords (32-Bit Local Bus) . . . . . . . . . . . 4-31

4-28. Non-Multiplexed Mode, Direct Slave Burst Read with Prefetch of Eight Lwords (16-Bit Local Bus) . . . . . . . . . . 4-32

4-29. Non-Multiplexed Mode, Direct Slave Burst Read with Prefetch of Four Lwords (8-Bit Local Bus) . . . . . . . . . . . . 4-33

4-30. Non-Multiplexed Mode, Direct Slave Read with Direct Slave Read Ahead Mode Enabled (CNTRL[16]=1) . . . . 4-34

4-31. Non-Multiplexed Mode, Direct Slave Burst Write with PCI Write Release Bus Mode Enabled (CNTRL[18]=1) . . 4-35

4-32. Non-Multiplexed Mode, Direct Slave Burst Read with PCI Write Release Bus Mode Disabled

(PCI Write Hold Bus Mode Enabled), PCI Read No Write Mode and PCI Read No Flush Mode

(Direct Slave Read Ahead Mode) Enabled, PCI Read with Write Flush Mode Disabled, and

PCI r2.1 Features Enabled (CNTRL[18:14]=01101) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-36

4-33. Multiplexed Mode, Direct Slave Single Write, Local Bus Big Endian (32-Bit) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-37

4-34. Multiplexed Mode, Direct Slave Single Read, Local Bus Big Endian (32-Bit) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-38

4-35. Multiplexed Mode, Direct Slave Burst Write, Local Bus Big Endian (32-Bit) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-39

4-36. Multiplexed Mode, Direct Slave Burst Write, Local Bus Big Endian (16-Bit) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-40

4-37. Multiplexed Mode, Direct Slave Burst Read, Local Bus Big Endian (32-Bit) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-41

4-38. Multiplexed Mode, Direct Slave Burst Read, Local Bus Big Endian (16-Bit) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-42

Timing Diagrams

PCI 9052 Data Book, Version 2.0

5-1. 8-Bit Memory Read/Write Standard ISA Cycle (6 LCLK Shown) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

5-2. 8-Bit Memory Read/Write Extended ISA Cycle (7 LCLK Shown) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

5-3. 8-Bit Memory Read/Write Compressed ISA Cycle (3 LCLK Shown) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9

5-4. 8-Bit I/O Read/Write Standard ISA Cycle (6 LCLK Shown) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10

5-5. 8-Bit I/O Read/Write Extended ISA Cycle (7 LCLK Shown) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10

5-6. 8-Bit I/O Read/Write Compressed ISA Cycle (3 LCLK Shown) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11

5-7. 16-Bit Memory Read/Write Standard ISA Cycle (3 LCLK Shown) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12

5-8. 16-Bit Memory Read/Write Extended ISA Cycle (4 LCLK Shown) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-12

5-9. 16-Bit Memory Read/Write Compressed ISA Cycle (2 LCLK Shown) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13

5-10. 16-Bit I/O Read/Write Standard ISA Cycle (3 LCLK Shown) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14

5-11. 16-Bit I/O Read/Write Extended ISA Cycle (4 LCLK Shown) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14

6-1. Chip Select [3:0]# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

7-1. Local Level-Triggered LINTi/LINTi2 Asserting PCI Output INTA# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3

7-2. Local Edge-Triggered Interrupt Asserting PCI Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4

7-3. USER[3:0] as Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5

7-4. USER[3:0] as Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6

PCI 9052 Data Book, Version 2.0

PREFACE

The information contained in this document is subject to change without notice. Although an effort has been made

to keep the information accurate, there may be misleading or even incorrect statements made herein.

SUPPLEMENTAL DOCUMENTATION

The following is a list of additional documentation to provide the reader with further information:

•PCI Local Bus Specification, Revision 2.1, June 1, 1995

PCI Special Interest Group (PCI SIG)

5440 SW Westgate Drive #217, Portland, OR 97221 USA

Tel: 800 433-5177 (domestic only) or 503 693-6232, Fax: 503 693-8344, http://www.pcisig.com

•PCI Local Bus Specification, Revision 2.2, December 18, 1998

PCI Special Interest Group (PCI SIG)

5440 SW Westgate Drive #217, Portland, OR 97221 USA

Tel: 800 433-5177 (domestic only) or 503 693-6232, Fax: 503 693-8344, http://www.pcisig.com

•PCI Hot-Plug Specification, Revision 1.0

PCI Special Interest Group (PCI SIG)

5440 SW Westgate Drive #217, Portland, OR 97221 USA

Tel: 800 433-5177 (domestic only) or 503 693-6232, Fax: 503 693-8344, http://www.pcisig.com

Note: In this data book, shortened titles are given to the works listed above. The following table lists these abbreviations.

Supplemental Documentation Abbreviations

Abbreviation Document

PCI r2.1 PCI Local Bus Specification, Revision 2.1

PCI r2.2 PCI Local Bus Specification, Revision 2.2

Hot-Plug r1.0 PCI Hot-Plug Specification, Revision 1.0

Preface

PCI 9052 Data Book, Version 2.0

TERMS AND DEFINITIONS

For other unfamiliar terms, refer to the index for text references.

REVISION HISTORY

•Direct Slave—External PCI Bus Master initiates Data

write/read to/from the Non-Multiplexed or Multiplexed

mode Local Bus.

Data Assignment Conventions

Data Width PCI 9052 Convention

1 byte (8 bits) Byte

2 bytes (16 bits) Word

4 bytes (32 bits) Lword

Date Revision Comments

8/16/1997 1.0 Initial release

12/02/1999 1.01 Applied minor format changes and corrected minor typographical errors.

Changed title from “Data Sheet” to “Data Book.”

Added 800 telephone number.

Changed copyright date to 1999.

Added primary title page, disclaimer and trademarks, part number, and list of Figures, Tables,

and Timing Diagrams.

Changed “negate” to “de-assert.”

Added note to appropriate figures that represent a bus cycle.

Changed “field” to “bit” in register-related tables.

Table 5-15, PCIBAR3[3], corrected reference to LAS1BRD.

Section 7, resequenced content, added section headings, and correctly mapped the input and output

waveforms with their respective captions.

Timing Diagram 9-24, corrected reference to Lword quantity.

2/09/2000 1.02 Corrected timing diagrams on pages 69-74 (last signal name was cut off from view).

9/2001 2.0 Initial version 2.0 release.

Expanded descriptions of operation, registers, and signals. Added pull-up/pull-down resistor

recommendations to the Pin Summary section. Renamed CNTRL[14] register bit from “PCI Read Mode” to

“PCI r2.1 Features Enable,” and added explanation of functionality into Section 4.2.1.2 (this bit must be

programmed in serial EEPROM to a value of 1, rather than the default 0 to enable PCI r2.1 protocol

enhancements beyond PCI r2.0 operation).

September 2001 PCI Bus Target Chip with Glueless

Version 2.0 ISA Interface Logic for Low-Cost Adapters

PCI 9052

PCI 9052 Data Book, Version 2.0

1—Introduction

1 INTRODUCTION

1.1 COMPANY AND PRODUCT

BACKGROUND

PLX Technology, Inc., is the leading supplier of

high-speed, interconnect silicon and software

solutions for the networking and communications

industry. These include high-speed silicon, reference

design tools that minimize design risk, and software

for managing data throughout the PCI Bus, as well as

third-party development tool support through the PLX

Partner Program, further extending our complete

solution.

The PLX solution enables hardware designers and

software developers to maximize system input/output

(I/O), lower development costs, minimize system

design risk, and accelerate time to market.

PLX PCI I/O Accelerator chips and I/O Processor

devices are designed in a wide variety of embedded

PCI communication systems, including switches,

routers, media gateways, base stations, access

multiplexors, and remote access concentrators. PLX

customers include many of the leading

communications equipment companies, including

3Com, Cisco Systems, Compaq Computer, Ericsson,

Hewlett-Packard, Intel, IBM, Lucent Technologies,

Marconi, Nortel Networks, and Siemens.

Founded in 1986, PLX has developed products based

on the PCI industry standard since 1994.

PLX is publicly-traded (NASDAQ: PLXT) and

headquartered in Sunnyvale, California, USA, with

operations in the United Kingdom, Japan, and China.

1.2 GENERAL DESCRIPTION

The PCI 9052 provides a compact high performance

PCI Bus Slave interface for adapter boards. The

PCI 9052 is designed to connect a wide variety of

Local Bus designs to the PCI Bus and allow relatively

slow Local Bus designs to achieve 132 MB/s Burst

transfers on the PCI Bus.

The PCI 9052 can be programmed to connect directly

to the Non-Multiplexed or Multiplexed mode 8-, 16-,

or 32-bit Local Bus. The 8-and 16-bit modes allow

easy conversion of ISA designs to PCI. (Refer to

Figure 1-1 on page 1-3.)

The PCI 9052 contains Read and Write FIFOs to

speed match the 32-bit wide, 33 MHz PCI Bus to a

Local Bus, which may be narrower or slower. Up to

five Local Address spaces and four Chip Select

outputs are supported.

1.3 PCI 9052 MAJOR FEATURES

PCI Local Bus Specification, Revision 2.1-

Compliant. The PCI 9052 is compliant with PCI r2.1,

supporting low cost slave adapters. This allows simple

conversion of ISA adapters to PCI.

Direct Slave (Target) Data Transfer Mode.

The PCI 9052 supports Burst Memory-Mapped and

single I/O-mapped accesses from the PCI-to-Local

Bus. Read and Write FIFOs enable high-performance

bursting on the Local and PCI Buses. The PCI Bus is

always bursting; however, the Local Bus can be set to

bursting or continuous single cycle.

ISA Interface Mode Logic on Board. The PCI 9052

supports single cycle reads/writes for 8- and 16-bit

Memory and I/O accesses from the PCI Bus to the ISA

Interface. Refer to Section 5, “ISA Interface Mode” to

learn how to use the PCI 9052 in ISA Interface mode.

Section 1

Introduction PCI 9052 Major Features

PCI 9052 Data Book, Version 2.0

Interrupt Generator. The PCI 9052 can generate a

PCI interrupt from two Local Bus interrupt inputs, or by

software writing to an internal register bit.

Clock. The PCI 9052 Local Bus interface runs from a

local TTL-compatible clock and generates the

necessary internal clocks. This clock runs

asynchronously to the PCI clock, allowing the Local

Bus to run at an independent rate from the PCI clock.

The buffered PCI Bus clock (BCLKO) may be

connected to the Local Bus clock (LCLK) through a

50-Ohm series resistor.

Programmable Local Bus Configurations. The

PCI 9052 supports 8-, 16-, or 32-bit Local Buses,

which may be Non-Multiplexed or Multiplexed mode.

In Non-Multiplexed mode, the PCI 9052 has four Local

Byte Enables (LBE[3:0]#), 26 address lines (LA[27:2]),

and 32, 16, or 8 data lines (LAD[31:0]).

In Multiplexed mode, the PCI 9052 has four Local Byte

Enables (LBE[3:0]#), and 28 address lines

(LAD[27:0]), multiplexed with 32, 16, or 8 data lines

(LAD[31:0]).

Direct Slave Read Ahead Mode. The PCI PCI 9052

supports Direct Slave Read Ahead mode, where

prefetched data can be read from the PCI 9052

internal FIFO instead of the Local Bus. The address

must be subsequent to the previous address and be

32-bit aligned (next address = current address + 4).

Bus Drivers. All control, address, and data signals

generated by the PCI 9052 directly drive the PCI and

Local Buses, without external drivers.

Serial EEPROM Interface. The PCI 9052 contains a

three-wire serial EEPROM interface that provides the

option of loading configuration information from a

serial EEPROM device. This is useful for loading

information unique to a particular adapter (such as

Vendor ID and chip selects).

Note: A serial EEPROM is required when ISA Interface mode

is selected.

Four Local Chip Selects. The PCI 9052 provides up

to four local chip selects. The base address and range

of each chip select are independently programmable

from the serial EEPROM or Host.

Five Local Address Spaces. The base address and

range of each local address space are independently

programmable from the serial EEPROM or Host.

Big/Little Endian Byte Swapping. The PCI 9052

supports Big and Little Endian byte ordering. The

PCI 9052 also supports Big Endian Byte Lane mode to

redirect the current word or byte lane during 16- or

8-bit Local Bus operation.

Local Bus Wait States. In addition to the LRDYi#

(local ready input) handshake signal for variable wait

state generation, the PCI 9052 has an internal wait

state generator (Read and Write address-to-data,

data-to-data, and data-to-address).

Read/Write Strobe Delay and Write Cycle Hold.

Read and Write strobe (RD# and WR#, respectively)

timings can be programmed independently for each

Local Address Space. RD# and WR# strobe assertion

at the beginning the cycle can be optionally delayed

during address-to-data wait states. The Write Cycle

Hold option extends data valid time for additional clock

cycles beyond WR# strobe de-assertion.

Programmable Prefetch Counter. The Local Bus

Prefetch Counter can be programmed to 0 (no

prefetch), 4, 8, 16, or Continuous (Prefetch Counter

turned off) Prefetch mode. The prefetched data can be

used as cached data if a consecutive address is used

(must be Lword-aligned).

Direct Slave Delayed Read Mode. The PCI 9052

supports PCI r2.1 Delayed Read with:

•PCI Read with Write Flush mode

•PCI Read No Flush mode

•PCI Read No Write mode

•PCI Write Release Bus mode

PCI Read/Write Retry Delay Timer. The PCI 9052

has a programmable Direct Slave (PCI Target) Retry

Delay timer, which, when expired, generates a Retry

to the PCI Bus.

PCI LOCK Mechanism. The PCI 9052 supports

Direct Slave LOCK sequences. A PCI Master can

obtain exclusive access to the PCI 9052 device by

locking to the PCI 9052.

PCI Bus Transfers up to 132 MB/s.

Low-Power CMOS in 160-pin Plastic QFP Package

(PQFP).

Section 1

PCI 9052 Major Features Introduction

PCI 9052 Data Book, Version 2.0

1—Introduction

Figure 1-1. PCI 9052 Block Diagram

LAD[31:0]

LINTi1

LINTi2

LRESET#

BCLKO

CS[1:0]#

USER2/CS2#

USER3/CS3#

ALE

MODE

LA[27:2]

LBE[3:0]#

LCLK

LHOLD

LHOLDA

USER0/WAITO#

USER1/LLOCKo#

ADS#

BLAST#

LW/R#

RD#

WR#

LRDYi#

BTERM#

EESK

EEDO

EEDI

EECS

AD[31:0]

C/BE[3:0]#

PAR

FRAME#

IRDY#

TRDY#

STOP#

IDSEL

DEVSEL#

PERR#

SERR#

CLK

RST#

INTA#

LOCK#

PCI

9052

PCI Bus

Local BusISA Interface

Memory

Serial

EEPROM

I/O

Controller

MEMRD#

MEMWR#

IORD#

IOWR#

SBHE#

ISAA[1:0]

LA[23:2]

LAD[15:0]

BALE

CHRDY

NOWS#

PCI Bus

Interface

Section 1

Introduction PCI 9052 and PCI 9050 Compatibility

PCI 9052 Data Book, Version 2.0

1.4 PCI 9052 AND PCI 9050

COMPATIBILITY

The PCI 9052 is pin- and register-compatible with the

PCI 9050. It uses the same PCI Device ID value of

9050h used by the PCI 9050. Software can distinguish

the PCI 9052 from the PCI 9050 by using the PCI

Revision ID register (PCIREV) value, which is 02h in

the PCI 9052 and 01h in the PCI 9050.

The following provides design migration compatibility

information from the PCI 9050 to the PCI 9052.

1.4.1 PCI 9052 New Features

The PCI 9052 provides these additional features over

the PCI 9050:

•ISA interface, configured with new INTCSR[12]

•Positive edge-triggered latched Local interrupt

inputs, configured and controlled with new

INTCSR[11:8] register bits

•Manufactured using .5 micron process, while the

PCI 9050 uses .6 micron

1.4.2 Errata

1.4.2.1 PCI 9050 Issues Resolved

in PCI 9052

The following outlines the PCI 9050 issues resolved in

the PCI 9052.

•PCI 9050 Errata #1

(Reads from Local Configuration Registers)

PCI 9052 Resolution—No restriction on reading

Local Configuration registers.

•PCI 9050 Errata #2

(Expansion ROM Space Enable)

PCI 9052 Resolution—EROMRR[0] Decode

Enable bit addition, allows the PCI 9052 to use

Expansion ROM without BIOS modification,

as needed for the PCI 9050.

•PCI 9050 Errata #5

(Read Ahead Mode with Burst Enabled)

PCI 9052 Resolution—Read Ahead mode and

Local burst can be enabled concurrently, rather

than being mutually exclusive, as in PCI 9050.

•PCI 9050 Design Notes #1 (RD# Read Strobe

Always Driven)

PCI 9052 Resolution—RD# is not driven when

the PCI 9052 does not own the Local Bus.

•PCI 9050 Design Notes #2 [Retry Delay Clock

(CNTRL[22:19]) Value]

PCI 9052 Resolution—No programmed serial

EEPROM required, as needed for the PCI 9050.

1.4.2.2 PCI 9052 Issues Not Present

in PCI 9050

The PCI 9052 issues not present in the PCI 9050 are

as follows:

• PCI 9052 Errata #3 (Microsoft Windows 98 write to

Subsystem Vendor ID register disables PCI 9052

PCI interrupt)

• PCI 9052 Design Notes #7 [approximately 50-Ohm

series resistor required, if BCLKO (buffered PCI

clock) drives LCLK]

• PCI 9052 Design Notes #8 (during PCI reset,

LAD[31:0] data pins are driven to random

power-up states)

1.4.3 Signaling

1.4.3.1 PCI Bus

The PCI 9052 PCI pins provide stronger drive current

than the PCI 9050.

1.4.3.2 Local Bus

•PCI 9052 ALE output pulse width is dependent

upon Local clock frequency, while the PCI 9050

ALE pulse width is frequency-independent.

•PCI 9052 drives Local Bus control signals when

it owns the Local Bus and is idle, while the

PCI 9050 does not. Impact—the PCI 9052

designs use fewer external pull-up/pull-down

resistors than the PCI 9050.

Section 1

PCI 9052 and PCI 9050 Compatibility Introduction

PCI 9052 Data Book, Version 2.0

1—Introduction

1.4.3.3 Pull-Up and Pull-Down Resistor

Recommendations

Table 1-1 through Table 1-3 detail pin pull-up/

pull-down resistor recommendations for the PCI 9052

and PCI 9050.

Table 1-1. Resistor Recommendations for PCI 9052 and PCI 9050 Input Pins

Pin Signal PCI 9052 PCI 9050

129 BTERM# Internal 80K-Ohm pull-up; if used,

add external pull-up

Internal 100K-Ohm pull-up; if used,

add external pull-up

45 CHRDY/NC None internal, pull or tie high No Connect

143 EEDO Pull-up required, if no EEPROM or blank serial

EEPROM is present Internal 100K-Ohm pull-up

135 LCLK 50-Ohm series resistor from BCLKO None

134 LHOLD None internal, drive or tie low Internal 50K-Ohm pull-down

136, 137 LINTi[2:1] None internal, pull to inactive state Internal 100K-Ohm pull-up

128 LRDYi# Internal 80K-Ohm pull-up; if used,

add external pull-up

Internal 100K-Ohm pull-up; if used,

add external pull-up

68 MODE None internal, tie high or low Internal 100K-Ohm pull-up

67 NOWS#/NC Internal 80K-Ohm pull-up No Connect

99 TEST Internal 50K-Ohm pull-down Internal 50K-Ohm pull-down

Table 1-2. Resistor Recommendations for PCI 9052 and PCI 9050 Output Pins

Pin Signal PCI 9052 PCI 9050

123 ADS# None needed if always Local Master If used, pull-up recommended

64 ALE/BALE None needed if always Local Master If used, pull-down recommended

63 BCLKO 50-Ohm series resistor to LCLK None (always driven)

124 BLAST# None needed if always Local Master If used, pull-up recommended

131, 130 CS[1:0]#/

MEMWR#/MEMRD# None (always driven) None (always driven)

142 EECS None (always driven) None (always driven)

145 EEDI None (always driven) None (always driven)

144 EESK None (always driven) None (always driven)

122,

119-105,

102-100,

98-92

LA[27:2] None needed if always Local Master If used, pull-ups recommended

46-49 LBE[3:0]#/

SBHE#/ISAA[1:0] None needed if always Local Master If used, pull-ups recommended

133 LHOLDA None (always driven) None (always driven)

132 LRESET#/

LRESET None (always driven) None (always driven)

127 LW/R# None needed if always Local Master If used, pull-up recommended

126 RD# None needed if always Local Master None (always driven)

125 WR# None needed if always Local Master If used, pull-up recommended

Section 1

Introduction PCI 9052 and PCI 9050 Compatibility

PCI 9052 Data Book, Version 2.0

Table 1-3. Resistor Recommendations for PCI 9052 and PCI 9050 I/O Pins

Pin Signal PCI 9052 PCI 9050

52-62,

69-79,

82-91

LAD[31:0] Pull-downs recommended for unused Pull-downs recommended for unused

138

USER0/

WAITO#/

IORD#

If USER0 input, pull to known state

If WAITO#, pull-up if not sole Master

If IORD#, pull-up if not sole Master

If USER0 input, pull to known state

If USER0 output, none needed

If WAITO# is used, pull-up recommended

139

USER1/

LLOCKo#/

IOWR#

If USER1 input, pull to known state

If LLOCKo#, pull-up if not sole Master

If IOWR#, pull-up if not sole Master

If USER1 input, pull to known state

If USER1 output, none needed

If LLOCKo# is used, pull-up recommended

140 USER2/CS2# If USER2 input, pull to known state

If CS2#, none (always driven)

If USER2 input, pull to known state

If CS2#, none (always driven)

141 USER3/CS3# If USER3 input, pull to known state

If CS3#, none (always driven)

If USER3 input, pull to known state

If CS3#, none (always driven)

Section 1

PCI 9052 Comparison with Other PLX Chips Introduction

PCI 9052 Data Book, Version 2.0

1—Introduction

1.5 PCI 9052 COMPARISON WITH OTHER PLX CHIPS

Table 1-4. PCI 9030, PCI 9050, and PCI 9052 Comparison

Feature PCI 9030 PCI 9050 PCI 9052

Pin Count and Type 176 PQFP/180 µBGA 160 PQFP 160 PQFP

Package Size 27 x 27 mm 31 x 31 mm 31 x 31 mm

Local Address Spaces 555

PCI Initiator Mode No No No

Number of FIFOs 222

FIFO Depth—PCI Target Write 32 Lwords (128 bytes) 16 Lwords (64 bytes) 16 Lwords (64 bytes)

FIFO Depth—PCI Target Read 16 Lwords (64 bytes) 8 Lwords (32 bytes) 8 Lwords (32 bytes)

LLOCKo# Pin for Lock Cycles Yes Yes Yes

WAITO# Pin for Wait State Generation Yes Yes Yes

BCLKO (BCLKo) Pin; Buffered PCI Clock Yes Yes Yes

ISA Interface No No Yes

Identical to the PCI 9050

and PCI 9052, but contains

additional registers for

increased functionality

——

Big Endian ! Little Endian Conversion Yes Yes Yes

Direct Slave Delayed Read Transactions Yes Yes Yes

Direct Slave Delayed Write Transactions Yes No No

PCI Bus Power Management Interface r1.1 Yes No No

PCI r2.2 VPD Support Yes No No

Programmable Prefetch Counter Yes Yes Yes

Programmable Wait States Yes Yes Yes

Programmable Local Bus READY# Timeout Yes No No

Programmable GPIOs 944

Additional Device and Vendor ID Registers Yes Yes Yes

Core and Local Bus VCC 3.3V 5V 5V

PCI Bus VCC 3.3V 5V 5V

3.3V PCI Bus and Local Bus Signaling Yes No No

5V Tolerant PCI Bus and Local Bus Signaling Yes Yes Yes

Serial EEPROM Support 2K-, 4K-bit devices 1K-bit devices 1K-bit devices

Serial EEPROM Read Control

Reads allowed via

VPD function and

Serial EEPROM Control

Reads allowed via

Serial EEPROM Control

Reads allowed via

Serial EEPROM Control

Direct Slave Read Ahead Mode Yes Yes Yes

CompactPCI Hot Swap Capability Ready Capable Capable

PCI 9052 Data Book, Version 2.0

2—Bus Operation

2 BUS OPERATION

This section discusses PCI and Local Bus operation.

2.1 PCI BUS

2.1.1 PCI Bus Interface and Bus Cycles

The PCI 9052 is compliant with PCI r2.1. Refer to it for

specific PCI Bus functions as a Direct Slave Interface

chip.

2.1.1.1 PCI Target (Direct Slave)

Command Codes

As a Target, the PCI 9052 allows access to the

PCI 9052 internal registers and the Local Bus, using

the commands listed in Table 2-1.

All Read or Write accesses to the PCI 9052 can be

Byte, Word, or Lword (32-bit data). All Memory

commands are aliased to basic Memory commands.

All PCI 9052 I/O accesses are decoded to an Lword

boundary.

Note: If no PCI Byte Enables (C/BE[3:0]#) are asserted with an I/O

Command access, the PCI 9052 issues a Target Abort.

2.1.1.2 Wait States—PCI Bus

The PCI Bus Master throttles IRDY# and the PCI Bus

Slave throttles TRDY# to insert PCI Bus wait state(s).

2.1.1.3 PCI Bus Little Endian Mode

The PCI Bus is a Little Endian Bus (that is, the

address is invariant and data is Lword-aligned to the

lowermost byte lane).

2.1.1.4 PCI Prefetchable

Memory Mapping

PCI Memory Address spaces assigned to the

PCI 9052 for its Local Address spaces can be mapped

as either prefetchable or non-prefetchable memory

within the system. Configuration software (PCI BIOS)

checks the PCI 9052 PCI Configuration register

Prefetchable bit(s) (PCIBARx[3], where x is the

number of the PCIBAR register) to determine whether

the Target memory is prefetchable. This value of this

bit(s) is set according to Local Configuration register

settings (as configured by serial EEPROM values) at

boot time.

When set to 1, the Prefetchable bit(s) signals that the

Memory space can operate under a prefetching

protocol, for improved performance. If a PCI Master

initiates a read to a location that is mapped in the

prefetchable address range, a Host-to-PCI or

PCI-to-PCI bridge is permitted to extend the Read

Transaction burst length in anticipation of the Master

consuming the additional data. The Prefetchable bit(s)

should normally be set if all the following conditions

are met:

•Multiple Memory reads of an Lword result in the

same data

•If Read data is discarded by the PCI Master,

no negative side effects occur

•Address space is not mapped as I/O

•Local Target must be able to operate with

byte merging

Table 2-1. Direct Slave Command Codes

Command Type Code (C/BE[3:0]#)

I/O Read 0010 (2h)

I/O Write 0011 (3h)

Memory Read 0110 (6h)

Memory Write 0111 (7h)

Configuration Read 1010 (Ah)

Configuration Write 1011 (Bh)

Memory Read Multiple 1100 (Ch)

Memory Read Line 1110 (Eh)

Memory Write and Invalidate 1111 (Fh)

Table 2-2. PCI Bus Little Endian Byte Lanes

Byte Number Byte Lane

0 AD[7:0]

1 AD[15:8]

2 AD[23:16]

3 AD[31:24]

Section 2

Bus Operation Local Bus

PCI 9052 Data Book, Version 2.0

Byte merging is an optional function of a Host-to-PCI

or PCI-to-PCI bridge in which bytes or combinations of

bytes written in any order by multiple individual

Memory Write cycles to one Lword address can be

merged within the bridge’s Posted Memory Write

buffer into a single Lword Write cycle. Byte merging is

possible when any of the bytes to be merged are

written only once, and the Prefetchable bit(s) is set

to 1 (PCIBARx[3]=1).

The Prefetchable bit(s) setting has no effect on

prefetching initiated by the PCI 9052. PCI 9052

prefetching is disabled, by default, in the Local

Configuration registers, and should be enabled to

support highest performance with Direct Slave Burst

reads and Direct Slave Read Ahead mode. (Refer to

Section 4.2.1.3.)

2.1.1.5 PCI Target (Direct Slave)

Accesses to an 8- or 16-Bit

Local Bus Device

Direct PCI access to an 8- or 16-bit Local Bus device

results in the PCI Bus Lword being broken into multiple

Local Bus transfers. For each 8-bit transfer, byte

enables are encoded to provide Local Address bits LA1

and LA0. For each 16-bit transfer, byte enables are

encoded to provide BLE#, BHE#, and LA1.

Do not use direct PCI access to an 8-bit bus with

nonadjacent byte enables in a PCI Lword.

Nonadjacent byte enables cause an incorrect LA1 and

LA0 address sequence when bursting to memory.

Therefore, for each Lword written to an 8-bit bus, the

PCI 9052 does not write data after the first gap. Direct

PCI accesses to an 8-bit bus with nonadjacent byte

enables are not terminated with a Target Abort.

Therefore, for nonadjacent bytes (illegal byte enables),

the PCI Master must perform single cycles.

2.2 LOCAL BUS

2.2.1 Introduction

The Local Bus provides a data path between the PCI

Bus and non-PCI devices, including memory devices

and peripherals. The Local Bus is a 32-bit

Non-Multiplexed or Multiplexed mode bus, with Bus

Memory regions that can be programmed for 8-, 16-,

or 32-bit widths.

The PCI 9052 is the Local Bus Master. The PCI 9052

can transfer data between the Local Bus, internal

registers and FIFOs. Burst lengths are not limited. The

bus width depends upon the Local Address Space

one default space (the Expansion ROM that can be

used as another address space). Each space contains

a set of Configuration registers that determine all Local

Bus characteristics when that space is accessed.

Figure 2-1. Local Bus Block Diagram

Direct Slave

FIFOs

Local Address/

Data Bus

Local Master

Controller

Local Arbiter

Configuration

Registers

Local Control

Feature Control

Address/Data

Data

Local/Data Control

LA[27:2]

LAD[31:0]

From PCI Bus

To PCI Bus

Config Data_Inbound

Config Data_Outbound

Data

To PCI Bus

Address/Data

From PCI Bus

From PCI Bus PCI Control

Section 2

Local Bus Bus Operation

PCI 9052 Data Book, Version 2.0

2—Bus Operation

2.2.1.1 Transactions

Four types of transactions can occur on a Local Bus:

•Read

•Write

•Read Burst

•Write Burst

A Bus access is a transaction which is bounded by the

assertion of ADS# at the beginning and de-assertion

of BLAST# at the end. A Bus access consists of an

Address cycle followed by one or more Data transfers.

During each Clock cycle of an access, the Local Bus is

in one of four basic states defined in Section 2.2.1.2.

A Clock cycle consists of one Local Bus clock period.

2.2.1.2 Basic Bus States

The four basic bus states are idle, address, data/wait,

and recovery. Once the Local Bus Master owns the

Bus and needs to start a Bus access, the address

state is entered, ADS# or ALE is asserted, and a valid

address is presented on the Address/Data Bus. Data

is then transferred while in a data/wait state. LRDYi#

or the internal wait state generator is used to insert

wait states. BLAST# is asserted during the last data/

wait state to signify the last transfer of the access. In

Multiplexed mode only, after all data is transferred, the

Bus enters the recovery state to allow the Bus devices

to recover. The Bus then enters the idle state and

waits for another access.

2.2.2 Local Bus Signals Used

in Timing Diagrams

The key Local Bus control signals listed in most timing

diagram examples are as follows:

•ADS# or ALE indicates the start of an access

•LRDYi#, WAITO#, and BTERM# are used to

insert wait states and terminate Burst cycles

during Data transfers

•LW/R# indicates the Data transfer direction

•BLAST# and BTERM# indicate the end of

an access

The key data signals are:

•LA Address Bus

•LAD Address, Data Bus

•LBE[3:0]# Local Byte Enables, indicating valid

byte lanes

2.2.3 Local Bus Signals

Signal usage varies upon application. There are four

groups of Local Bus signals:

•Clock

•Address/Data

•Control/Status

•Arbitration

2.2.3.1 Clock

LCLK, the Local Bus clock, operates at frequencies up

to 40 MHz, and is asynchronous to the PCI Bus clock.

Most Local Bus signals are driven and sampled on the

rising edge of LCLK. Setup and hold times, with

respect to LCLK, must be observed. (Refer to

Section 10.2, “Local Inputs,” on page 10-2 for setup

and hold timing requirements.)

2.2.3.2 Address/Data

2.2.3.2.1 LA[27:2]

LA[27:2] contains the transfer word address.

2.2.3.2.2 LAD[31:0]

In Non-Multiplexed mode, the LAD[31:0] Bus is a

32-bit Non-Multiplexed Data Bus. During Data phases,

LAD[31:0], LAD[15:0], or LAD[7:0] contain transfer

data for a 32-, 16-, or 8-bit bus, respectively. If the bus

is 8 or 16 bits wide, data supplied by the PCI 9052 is

replicated across the entire 32-bit wide bus.

In Multiplexed mode, the LAD[31:0] Bus is a 32-bit

Multiplexed Address/Data Bus. During an Address

phase, LAD[27:0] contains the transfer word address.

LAD[1:0] have the same address value as LBE[1:0]#,

for use with 8- or 16-bit bus width addressing.

Note: Dedicated address pins are available.

Section 2

Bus Operation Local Bus

PCI 9052 Data Book, Version 2.0

During Data phases, LAD[31:0], LAD[15:0], or

LAD[7:0] contain transfer data for a 32-, 16-, or 8-bit

bus, respectively. If the bus is 8 or 16 bits wide, data

supplied by the PCI 9052 is replicated across the

entire 32-bit wide bus.

2.2.3.3 Control/Status

The control/status signals control the address latches

and flow of data across the Local Bus.

2.2.3.3.1 ADS#, ALE

A Local Bus access starts when ADS# (address

strobe) is asserted during an address state by the

PCI 9052 as the Local Bus Master. ALE is used to

strobe the LA/LAD Bus into an external address latch.

Refer to Figure 10-3 on page 10-4 for ALE timing

specifications.

2.2.3.3.2 LBE[3:0]#

During an Address phase, the LBE[3:0]# Local Byte

Enables denote which byte lanes are being used

during access of a 32-bit bus. They remain asserted

until the end of the Data transfer.

2.2.3.3.3 LLOCKo#

When the PCI 9052 owns the Local Bus, LLOCKo# is

asserted to indicate that an atomic operation for a

Direct Slave access may require multiple transactions

to complete. LLOCKo# is asserted during the Address

phase of the first transaction of the atomic operation,

and de-asserted one clock after the last transaction of

the atomic operation completes. If enabled, the Local

Bus arbiter does not grant the Bus to another Master

until the atomic operation is complete.

2.2.3.3.4 LRDYi#

The LRDYi# input pin has a corresponding Enable bit

in the Bus Region Descriptor register for each Local

address space. If LRDYi# is enabled, this indicates

that Write data is being accepted or Read data is

being provided by the Bus Slave. If a Bus Slave needs

to insert wait states, it can de-assert LRDYi# until it is

ready to accept or provide data. If LRDYi# is disabled,

then the Local Bus transfer length can be determined

by internal wait state generators. LRDYi# is not

sampled until address-to-data or data-to-data wait

states have expired. (Refer to Table 2-3.)

When BTERM# input is enabled for a Local Address

space in the corresponding Bus Region Descriptor

in place of LRDYi#. When BTERM# is enabled and

asserted, LRDYi# input is ignored. Further information

regarding BTERM# is provided in Section 2.2.4.3.

2.2.3.3.5 LW/R#

During an Address phase, LW/R# is driven to a

valid state, and signifies the data transfer

direction. Because the PCI 9052 is the Local Bus

Master, LW/R# is driven high when the PCI 9052 is

writing data to the Local Bus, and low when it is

reading the bus.

2.2.3.3.6 RD#

RD# is a general purpose read output strobe. The

timing is controlled by the current Bus Region

Descriptor register. The RD# strobe is asserted during

the entire Data transfer. Normally, it is also asserted

during NRAD wait states, unless Read Strobe Delay

clocks are programmed in bits [27:26]. RD# remains

asserted throughout Burst and NRDD wait states.

2.2.3.3.7 WAITO#

WAITO# is an output that provides status of the

internal wait state generators. It is asserted while

internal wait states are being inserted. LRDYi# input is

not sampled until WAITO# is de-asserted.

Table 2-3. LRDYi# Data Transfers, with PCI 9052 as Master Device

Slave

Device

LRDYi#

DescriptionInput Enable Signal

Address

Spaces

0 Ignored

LRDYi# is not sampled by the PCI 9052. Data transfers determined by the internal wait state

generator. LRDYi# is ignored and the Data transfer occurs after the internal wait state

counter expires.

1 Sampled

LRDYi# is sampled by the PCI 9052. Data transfers are determined by an external device,

which asserts LRDYi# to indicate a Data transfer is occurring. LRDYi# is not sampled until

address-to-data or data-to-data wait states have expired.

Section 2

Local Bus Bus Operation

PCI 9052 Data Book, Version 2.0

2—Bus Operation

2.2.3.3.8 WR#

WR# is a general purpose write output strobe. The

timing is controlled by the current Bus Region

Descriptor register. The WR# strobe is asserted during

the entire Data transfer. WR# is normally asserted

during NWAD wait states, unless Write Strobe Delay

clocks are programmed in bits [29:28]. WR# remains

asserted throughout Burst and NWDD wait states.

The LAD data bus hold time can be extended beyond

WR# de-assertion if Write Cycle Hold clocks are

programmed in bits [31:30].

2.2.3.4 Local Bus Arbitration

The PCI 9052 is the Local Bus Master. When the PCI

Bus initiates a new transfer request, the PCI 9052

takes control of the Local Bus. Another device can

gain control of the Local Bus by asserting LHOLD. If

the PCI 9052 has no cycles to run, it asserts LHOLDA,

transferring control to the external Master. If the

PCI 9052 requires the Local Bus before the external

Master completes, LHOLDA is de-asserted (preempt

condition).

LHOLD can be pulled low or grounded to provide

permanent Local Bus ownership to the PCI 9052.

2.2.3.4.1 LHOLD

LHOLD is asserted by a Local Bus Master to request

Local Bus use. The PCI 9052 can be made master of

the Local Bus by pulling or driving LHOLD low (or by

grounding LHOLD).

2.2.3.4.2 LHOLDA

LHOLDA is asserted by the PCI 9052 to grant Local

Bus control to a Local Bus Master. When the PCI 9052

requires the Local Bus, it signals a preempt by

de-asserting LHOLDA.

2.2.4 Local Bus Interface

and Bus Cycles

The PCI 9052 is the Local Bus Master. The PCI 9052

interfaces a PCI Host Bus to a Non-Multiplexed or

Multiplexed Local Bus, selected by the MODE pin, as

listed in Table 2-4.

Notes: No PCI Initiator (Direct Master) capability.

Internal registers are not readable/writable from the Local Bus.

The internal registers are accessible from the Host CPU on the

PCI Bus or from the serial EEPROM.

2.2.4.1 Bus Cycles

In both Non-Multiplexed and Multiplexed modes, the

LA[27:2] Address Bus drives an access address valid,

beginning one clock prior to ADS# assertion (which

signals the start of the Bus cycle) and continues until

the cycle ends (signaled by BLAST# de-assertion). In

Multiplexed mode (MODE=1), the LAD[31:0]

Multiplexed Address/Data Bus also drives the access

address valid onto LAD[27:0], beginning one clock

prior to ADS# assertion and continuing until ADS#

de-assertion one clock later, after which data is driven.

The LAD[31:0] Data Bus drives Write data valid one

clock after ADS# assertion when ADS# de-asserts,

and continues until the cycle ends or until data-to-

address wait states (or data-to-data wait states if burst

is enabled) begin, if programmed. BLAST# assertion

indicates the last Data cycle of an access. (Refer to

Figure 2-2 and Figure 2-3.)

Table 2-4. Local Bus Types

MODE Pin Mode Bus Width

0Non-Multiplexed

32-, 16-, and/or 8-bit

Non-ISA

and/or 16- or 8-bit ISA

1Multiplexed 32-, 16-, and/or 8-bit

Section 2

Bus Operation Local Bus

PCI 9052 Data Book, Version 2.0

Figure 2-2. PCI 9052 Single Cycle Write

Note: NWDD is relevant only in a Burst cycle, where it determines

the wait state between successive Data cycles.

Figure 2-3. PCI 9052 Single Cycle Read

Note: NRDD is relevant only in a Burst cycle, where it determines

the wait state between successive Data cycles.

Write Cycle Hold, Example=3

Write Strobe Delay, Example=1

NWAD, Example=2

NXDA, Example=2

ADDR

DATA

ADDR

DATA

Data Transferred

0ns 250ns 500ns

LCLK

ADS#

BLAST#

LA[27:2]

LAD[31:0]

WAITO#

WR#

LW/R#

LRDYi#

ADDR

DATA

ADDR

DATA

0ns 100ns 200ns 300ns 400ns

LCLK

ADS#

BLAST#

LA[27:2]

LAD[31:0]

WAITO#

RD#

LW/R#

LRDYi#

NXDA, Example=2

Read Strobe Delay, Example=1

NRAD, Example=2

Data Transferred

Section 2

Local Bus Bus Operation

PCI 9052 Data Book, Version 2.0

2—Bus Operation

Write cycle data valid time and Read cycle data time

can be extended with internally generated address-to-

data wait states and/or by delaying LRDYi# ready

input assertion if LRDYi# input is enabled for the

Space. When enabled, LRDYi# input assertion

indicates to the PCI 9052 that Read data on the bus is

valid to accept or a Write Data transfer has completed.

LRDYi# input is not sampled until address-to-data wait

states (and/or data-to-data wait states with burst),

which are signaled by WAITO# output assertion,

expire (WAITO# output de-asserted). LRDYi# is

ignored during the Address cycle (ADS# assertion),

internally generated data-to-address wait states, and

idle cycles between transfers. BTERM# input, if

enabled, is used to break up a Burst access and also

serves as a ready input. (Refer to Section 2.2.4.3.)

For non-ISA spaces, the RD# and WR# strobes can

be independently programmed for each Local Address

Space. RD# and/or WR# strobe assertion can be

optionally delayed during address-to-data wait states.

For non-ISA spaces, Write Cycle Hold clocks can be

selectively programmed to extend data hold time

beyond WR# strobe de-assertion.

Recovery (idle) cycles can be optionally programmed

for each Space, using data-to-address wait states to

extend time between Local bus accesses to allow

sufficient time for an external device to float its data

pins after a Read request.

2.2.4.2 Wait State Control

The PCI 9052 as a Local Bus Master signals internal

wait states with the WAITO# signal. Local Bus devices

can insert external wait states by delaying LRDYi#

input assertion. (Refer to Figure 2-2 and Figure 2-3.)

The following figure illustrates wait state control.

Figure 2-4. Wait States

Note: The figure represents a sequence of Bus cycles.

2.2.4.2.1 Internal Wait State Generator

The Local Address Space Bus Region Descriptor can

be used to program the number of wait states (if any)

generated by the internal wait state generator. (Refer

to Table 2-5.)

NXDA wait states are inserted only after the last Data

transfer of a Bus request. For example, for a Direct

Slave single Cycle access to an 8-bit burst Local Bus,

NXDA wait states are inserted only after the fourth

byte, rather than after every byte.

2.2.4.2.2 Ready Signaling

If LRDYi# mode is disabled, the external LRDYi# input

signal has no effect on wait states for a Local access.

Wait states between Data cycles are inserted

internally by a wait state counter. The wait state

counter is initialized with its Configuration register

value at the start of each Data access.

If LRDYi# mode is enabled and the internal wait state

counter is zero (default value), the LRDYi# input

controls the number of additional wait states.

If LRDYi# mode is enabled and the internal wait state

counter is programmed to a non-zero value, LRDYi#

has no effect until the wait state counter reaches 0.

When it reaches 0, the LRDYi# input controls the

number of additional wait states.

The BTERM# input can also be used as a ready input.

(Refer to Section 2.2.4.3.) If the internal wait state

counter is programmed to a non-zero value and

BTERM# is enabled, BTERM# input is not sampled

until the wait state counter reaches 0.

PCI

9052

Accessing PCI 9052

from PCI Bus

PCI 9052

accessing Local Bus

Local Bus can respond

to PCI 9052 requests

with LRDYi#

PCI Bus Local Bus

PCI 9052 de-asserts

TRDY# when waiting

on the Local Bus

PCI Bus de-asserts IRDY#

for wait states or

simply ends the cycle

when it is not ready

PCI 9052 generates wait

states with WAITO#

(programmable)

Section 2

Bus Operation Local Bus

PCI 9052 Data Book, Version 2.0

2.2.4.3 Burst Mode and Continuous

Burst Mode (Bterm “Burst

Terminate” Mode)

Note: In the following sections, Bterm refers to the

PCI 9052 internal register bit and BTERM# refers to the

PCI 9052 external signal.

2.2.4.3.1 Burst and Bterm Modes

As an input, BTERM# is asserted by external logic.

It instructs the PCI 9052 to break up a Burst cycle.

On the Local Bus, BLAST# and BTERM# perform the

following:

•If Local Bus bursting is enabled for a Local Address

space (LASxBRD[0]=1 and/or EROMBRD[0]=1,

where x is the Local Address Space number),

but Bterm mode (continuous burst) and the

BTERM# input are disabled (LASxBRD[2]=0 and/or

EROMBRD[2]=0), the PCI 9052 bursts (up to four

Data phases). BLAST# is asserted at the beginning

of the fourth Lword Data phase (LA[3:2]=11) and

a new ADS# is asserted at the first Lword

(LA[3:2]=00) of the next burst.

•If Bterm mode and the BTERM# input are enabled

(LASxBRD[2]=1 and/or EROMBRD[2]=1) and

asserted, the PCI 9052 terminates the Burst cycle

at the end of the current Data phase without

generating BLAST#. The PCI 9052 generates

a new Burst transfer, starting with a new ADS#,

and terminating it normally using BLAST#.

•The BTERM# input is valid only when the PCI 9052

is performing a Direct Slave transaction.

•BTERM# is used to indicate a Memory access

is crossing a page boundary or requires a new

Address cycle.

•If the internal wait state counter is programmed

to a non-zero value and Bterm mode and

the BTERM# input are enabled (LASxBRD[2]=1

and/or EROMBRD[2]=1), the BTERM# input is not

sampled until the wait state counter reaches 0.

•BTERM# always overrides LRDYi#, even if

both signals are asserted. BTERM# executes the

ongoing transaction and causes the PCI 9052

to initiate a new Address/Data cycle for Burst

transactions.

Note: If the Bterm mode (continuous burst) and the BTERM# input

are disabled (LASxBRD[2]=0 and/or EROMBRD[2]=0), the

PCI 9052 performs the following:

•32-bit Local Bus—Bursts up to four Lwords

•16-bit Local Bus—Bursts up to two Lwords

•8-bit Local Bus—Bursts up to one Lword

In every case, it performs four data beats.

Table 2-5. Local Address Space Bus Region Descriptor Internal Wait States

Wait State Bits Description

NRAD LASxBRD[10:6]

EROMBRD[10:6]

Number of Read Address-to-Data wait states (0-31). (Wait states between the Address

cycle and first Read Data cycle.)

NRDD LASxBRD[12:11]

EROMBRD[12:11]

Number of Read Data-to-Data wait states (0-3). (Wait states between consecutive

Data cycles of a Burst read.)

NXDA LASxBRD[14:13]

EROMBRD[14:13]

Number of Read/Write Data-to-Address wait states (0-3). LAD Bus Write data is not valid

during NXDA wait states. (Wait states between consecutive bus requests. NXDA wait

states are inserted only after the last Data transfer of a Direct Slave access.)

NWAD LASxBRD[19:15]

EROMBRD[19:15]

Number of Write Address-to-Data wait states (0-31). LAD Bus data is valid during

NWAD wait states. (Wait states between the Address cycle and first Write Data cycle.)

NWDD LASxBRD[21:20]

EROMBRD[21:20]

Number of Write Data-to-Data wait states (0-3). (Wait states between consecutive

Data cycles of a Burst write.)

Table 2-6. Burst and Bterm on the Local Bus

Mode Burst Bterm Result

Single Cycle

One ADS# per data

(default)

One ADS# per data

Burst-4

Lword 10

One ADS# per four data

Continuous

Burst 11

One ADS# per

BTERM# (refer to

Section 2.2.4.3.2.1)

Section 2

Local Bus Bus Operation

PCI 9052 Data Book, Version 2.0

2—Bus Operation

2.2.4.3.2 Burst-4 Lword Mode

If Bterm mode (continuous burst) and the BTERM#

input are disabled, and Local Bus bursting is enabled

for a Local Address space (LASxBRD[2,0]=01 and/or

EROMBRD[2,0]=01, respectively), bursting can start

on any Lword boundary and continue up to a 16-byte

address boundary. After data up to the boundary is

transferred, the PCI 9052 asserts a new Address cycle

(ADS#).

2.2.4.3.2.1 Continuous Burst Mode

(Bterm “Burst Terminate”

Mode)

If Bterm mode and the BTERM# input are enabled,

and Local Bus bursting for a Local Address space is

enabled (LASxBRD[2, 0]=11 and/or EROMBRD[2, 0]

=11, respectively), the PCI 9052 can operate beyond

Burst-4 Lword mode.

Bterm mode enables the PCI 9052 to perform long

bursts to devices that can accept bursts of longer than

four Lwords. The PCI 9052 asserts one Address cycle

and continues to burst data. If a device requires a new

Address cycle (ADS#), it can assert the BTERM# input

to cause the PCI 9052 to assert a new Address cycle.

The BTERM# input acknowledges the current Data

transfer (replacing LRDYi#) and requests that a new

Address cycle be asserted (ADS#). The new address

is for the next Data transfer.

If Bterm mode and BTERM# input are enabled

(LASxBRD[2]=1 and/or EROMBRD[2]=1) and the

BTERM# signal is asserted, the PCI 9052 asserts

BLAST# only if its Read FIFO is full, its Write FIFO is

empty, or a transfer is complete.

2.2.4.3.3 Partial Lword Accesses

Partial Lword accesses are Lword accesses in which

not all byte enables are asserted.

Burst Start addresses can be any Lword boundary. If

the Burst Start address in a Direct Slave transfer is not

aligned to an Lword boundary, the PCI 9052 first

performs a single cycle. It then starts to burst on the

Lword boundary.

2.2.4.4 Recovery States

In Non-Multiplexed mode, the PCI 9052 uses the

NXDA (data-to-address wait states) value in the Bus

Region Descriptor register(s) (LASxBRD[14:13] and/or

EROMBRD[14:13], where x is the Local Address

Space number) to determine the number of recovery

states to insert between the last data transfer and next

address cycle. This value can be programmed

between 0 and 3 clock cycles (default value is 0).

In Multiplexed mode, the PCI 9052 inserts a minimum

of one recovery state between the last data transfer

and the next address cycle. Add recovery states by

programming values greater than one into the NXDA

bits of the Bus Region Descriptor register(s)

(LASxBRD[14:13] and/or EROMBRD[14:13], where x

is the Local Address Space number).

Note: The PCI 9052 does not support the i960J function that

uses the LRDYi# input to add recovery states. No additional

recovery states are added if the LRDYi# input remains asserted

during the last Data cycle.

Table 2-7. Burst-4 Lword Mode

Bus Width Burst

32 bit Four Lwords or up to a quad-Lword boundary

(LA[3:2]=11)

16 bit Four words or up to a quad-word boundary

(LA[2:1]=11)

8 bit Four bytes or up to a quad-byte boundary

(LA[1:0]=11)

Table 2-8. Direct Slave Single and Burst Reads

Bus Direct Slave

Single Reads

Direct Slave

Burst Reads

32-, 16-, or 8-bit

Local Bus

Passes the

byte enables

Ignores the byte

enables and all

32-bit data is passed

Section 2

Bus Operation Local Bus

PCI 9052 Data Book, Version 2.0

2.2.4.5 Local Bus Read Accesses

For all single cycle Local Bus Read accesses, the

PCI 9052 reads only bytes corresponding to byte

enables requested by a PCI Master. For all Burst

Read cycles, the PCI 9052 can be programmed to:

•Perform Direct Slave Delayed Reads

•Perform Direct Slave Read Ahead

•Generate internal wait states

•Enable external wait control (LRDYi# input)

•Enable type of Burst mode to perform

2.2.4.6 Local Bus Write Accesses

For Local Bus writes, only bytes specified by a

PCI Bus Master are written. For all Burst Write cycles,

the PCI 9052 can be programmed to:

•Generate internal wait states

•Enable external wait control (LRDYi# input)

2.2.5 Local Bus Big/Little Endian Mode

The PCI 9052 Local Bus can be independently

programmed to operate in Little or Big Endian mode

for each of the following transfer types:

•Direct Slave accesses to Local Address Space 0

•Direct Slave accesses to Local Address Space 1

•Direct Slave accesses to Local Address Space 2

•Direct Slave accesses to Local Address Space 3

•Direct Slave accesses to Expansion ROM

Notes: The PCI Bus is always Little Endian.

Only byte lanes are swapped, not individual bits.

The PCI 9052 Local Bus can be programmed to

operate in Big or Little Endian mode, as listed in

Table 2-9.

Big/Little Endian Control bits are as follows:

•LAS0BRD[24]—Space 0

•LAS1BRD[24]—Space 1

•LAS2BRD[24]—Space 2

•LAS3BRD[24]—Space 3

•EROMBRD[24]—Expansion ROM

In Big Endian mode, the PCI 9052 transposes data

byte lanes. Data is transferred as listed in Table 2-10

through Table 2-14.

2.2.5.1 32-Bit Local Bus—

Big Endian Mode

Data is Lword-aligned to the uppermost byte lane

(Address Invariance).

Figure 2-5. Big/Little Endian—32-Bit Local Bus

Table 2-9. Big/Little Endian Byte Number and

Lane Cross-Reference

Byte Number

Byte LaneBig Endian Little Endian

3 0 LAD[7:0]

2 1 LAD[15:8]

1 2 LAD[23:16]

0 3 LAD[31:24]

Table 2-10. Lword Lane Transfer—32-Bit Local Bus

Burst Order Byte Lane

First Transfer

PCI Byte 0 appears on Local Data [31:24]

PCI Byte 1 appears on Local Data [23:16]

PCI Byte 2 appears on Local Data [15:8]

PCI Byte 3 appears on Local Data [7:0]

Little Endian

Big Endian

BYTE 3

BYTE 0

BYTE 2

BYTE 1

BYTE 2

BYTE 0

BYTE 3

31 0

Section 2

Local Bus Bus Operation

PCI 9052 Data Book, Version 2.0

2—Bus Operation

2.2.5.2 16-Bit Local Bus—

Big Endian Mode

For a 16-bit Local Bus, the PCI 9052 can be

programmed to use upper or lower word lanes.

Figure 2-6. Big/Little Endian—16-Bit Local Bus

2.2.5.3 8-Bit Local Bus—

Big Endian Mode

For an 8-bit Local Bus, the PCI 9052 can be

programmed to use upper or lower byte lanes.

Figure 2-7. Big/Little Endian—8-Bit Local Bus

Table 2-11. Upper Word Lane Transfer—

16-Bit Local Bus

Burst Order Byte Lane

First Transfer

Byte 0 appears on Local Data [31:24]

Byte 1 appears on Local Data [23:16]

Second Transfer

Byte 2 appears on Local Data [31:24]

Byte 3 appears on Local Data [23:16]

Table 2-12. Lower Word Lane Transfer—

16-Bit Local Bus

Burst Order Byte Lane

First Transfer

Byte 0 appears on Local Data [15:8]

Byte 1 appears on Local Data [7:0]

Second Transfer

Byte 2 appears on Local Data [15:8]

Byte 3 appears on Local Data [7:0]

Little Endian

Big Endian

BYTE 3 BYTE 2

BYTE 0 BYTE 1

BYTE 1 BYTE 0

BYTE 0 BYTE 1

31 0

First Cycle

Second Cycle

15 0

Table 2-13. Upper Byte Lane Transfer—

8-Bit Local Bus

Burst Order Byte Lane

First Transfer Byte 0 appears on Local Data [31:24]

Second Transfer Byte 1 appears on Local Data [31:24]

Third Transfer Byte 2 appears on Local Data [31:24]

Fourth Transfer Byte 3 appears on Local Data [31:24]

Table 2-14. Lower Byte Lane Transfer—

8-Bit Local Bus

Burst Order Byte Lane

First Transfer Byte 0 appears on Local Data [7:0]

Second Transfer Byte 1 appears on Local Data [7:0]

Third Transfer Byte 2 appears on Local Data [7:0]

Fourth Transfer Byte 3 appears on Local Data [7:0]

Little Endian

Big Endian

BYTE 3 BYTE 2

BYTE 0

BYTE 1 BYTE 0

BYTE 0

31 0

First

Cycle

Second

Cycle

Third

Cycle

Fourth

Cycle

15 8

23 16

31 24

Section 2

Bus Operation Arbitration Timing Diagram

PCI 9052 Data Book, Version 2.0

2.3 ARBITRATION TIMING DIAGRAM

Timing Diagram 2-1. PCI 9052 Local Bus Arbitration

Should not be re-asserted until LHOLDA goes low

Local Bus Master

Drives the Bus

PCI 9052 Drives the Local BusPCI 9052 Drives

the Local Bus

0ns 250ns 500ns

LCLK

LHOLD

LHOLDA

LOCAL BUS

PCI 9052 Data Book, Version 2.0

3—Reset & Serial EEPROM

3 RESET AND SERIAL EEPROM INITIALIZATION

3.1 INITIALIZATION

During power-on, the PCI RST# signal resets the

default values of the PCI 9052 internal registers. In

return, the PCI 9052 outputs the local LRESET# signal

and checks for a serial EEPROM. If a serial EEPROM

exists, and the first 48 bits are not all ones (1), the

PCI 9052 loads the internal registers from the serial

EEPROM. Otherwise, default values are used. The

PCI 9052 Configuration registers can be written only

by the optional serial EEPROM or PCI Host processor.

During serial EEPROM initialization, the PCI 9052

response to Direct Slave accesses is Retrys.

3.2 RESET

3.2.1 PCI Bus RST# Input

PCI Bus RST# input assertion causes all PCI Bus

outputs to float, resets the entire PCI 9052, asserts

Local reset output LRESET#, and floats all other Local

Bus output and I/O pins except BCLKO, EECS, EEDI,

EESK, and LHOLDA, and Local Data Bus signals

(LAD[31:0]) which the PCI 9052 drives to a random

power-up state during reset. (Refer to PCI 9052

Design Notes #8.)

3.2.2 Software Reset

A PCI host can set the PCI Adapter Software Reset

bit (CNTRL[30]=1) to reset the PCI 9052,

assert LRESET#/LRESET, and float Local Bus output

and I/O pins as described in Section 3.2.1. (Refer to

PCI 9052 Design Notes #8.) The PCI and Local

Configuration register contents are not reset. When

the PCI Adapter Software Reset bit is set, the

PCI 9052 responds only to Configuration register

accesses, and not to Local Bus accesses. The

PCI 9052 remains in this reset condition until the PCI

Host clears the PCI Adapter Software Reset bit

(CNTRL[30]=0). The PCI Interface is not reset.

Note: If Direct Slave Read Ahead mode is enabled (CNTRL[16]=1),

disable it prior to a software reset, or if following a software reset,

perform a Direct Slave read of any valid Local Bus address, except

the next sequential Lword referenced from the last Direct Slave

read, to flush the Direct Slave Read FIFO.

3.2.3 Local Bus Output LRESET#

LRESET# is asserted when the PCI Bus RST# input is

asserted (4 to 10 ns delay) or the PCI Adapter

Software Reset bit is set (CNTRL[30]=1).

3.3 SERIAL EEPROM

After reset, the PCI 9052 attempts to read the serial

EEPROM to determine its presence. An active low

Start bit indicates the serial EEPROM is present.

(Refer to the manufacturer’s data sheet for the

particular serial EEPROM being used.) If the first

48 bits in the serial EEPROM are not all ones (1), then

the PCI 9052 assumes the device is not blank, and

continues reading.

For blank serial EEPROM conditions, the PCI 9052

reverts to the default values. (Refer to Table 3-1.)

When the Serial EEPROM Present bit is set to 1

(CNTRL[28]=1), if programmed, real or random data is

detected in the serial EEPROM.

A serial data Start bit set to 1 indicates that a serial

EEPROM is not present. For missing serial EEPROM

conditions, the PCI 9052 stops the serial EEPROM

load and reverts to the default values. If no serial

EEPROM is present, pull EEDO high through a

resistor to prevent false detection of a low Start bit. If

no serial EEPROM is present and EEDO is not pulled

high through a resistor, the PCI 9052 may load all

zeros (0) into its registers, rather than chip default

values.

The 5V serial EEPROM clock is derived from the PCI

clock. The PCI 9052 generates the serial EEPROM

clock by internally dividing the PCI clock by 32.

Section 3

Reset and Serial EEPROM Initialization Serial EEPROM

PCI 9052 Data Book, Version 2.0

Notes: 2K-bit devices, such as the FM93CS56, are not

compatible.

The PCI 9052 does not support serial EEPROMs that do not support

sequential reads (such as the FM93C46L).

A PCI Bus host can read or program the serial

EEPROM. Register bits CNTRL[29:24] control the

PCI 9052 pins, enabling reading or writing of the serial

EEPROM bits. (Refer to the manufacturer’s data sheet

for the particular serial EEPROM being used.)

To reload serial EEPROM data into the PCI 9052

internal registers, write 1 to the Reload Configuration

Registers bit (CNTRL[29]=1).

The following steps are necessary, to read or write to

the serial EEPROM:

1. Enable the serial EEPROM Chip Select, EECS,

by writing 1 to the Serial EEPROM Chip Select

bit (CNTRL[25]=1).

2. Generate the serial EEPROM clock by writing 0

and then 1. The data is read or written during

the zero-to-one transition. (Refer to

CNTRL[24].)

3. Send the command code to the serial EEPROM.

4. If the serial EEPROM is present, 0 is returned

as a Start bit after the command code.

5. Read or write the data.

6. Write 0 to CNTRL[25] to end serial EEPROM

access (the serial EEPROM EECS pin

goes low).

3.3.1 Serial EEPROM Load Sequence

The serial EEPROM load sequence, listed in

Table 3-2, uses the following abbreviations:

•MSW = Most Significant Word bits [31:16]

•LSW = Least Significant Word bits [15:0]

3.3.1.1 Serial EEPROM Load

The registers listed in Table 3-2 are loaded from the

serial EEPROM after a PCI reset is de-asserted. The

serial EEPROM is organized in words (16-bit). The

PCI 9052 first loads the Most Significant Word bits

(MSW[31:16]), starting from the most significant bit

([31]). The PCI 9052 then loads the Least Significant

Word bits (LSW[15:0]), starting again from the most

significant bit ([15]). Therefore, the PCI 9052 loads the

Device ID, Vendor ID, Class Code, and so forth.

The serial EEPROM values can be programmed using

a serial EEPROM programmer or PLXMon™ software.

The CNTRL register allows programming of the serial

EEPROM, one bit at a time. Values should be

programmed in the order listed in Table 3-2. The 50,

16-bit words listed in the table are stored sequentially

in the serial EEPROM.

3.3.1.2 Recommended Serial EEPROMs

The PCI 9052 is designed to use serial EEPROMs

with a three-wire serial interface, powered at 5V, and

that support 1 MHz clocking and sequential reads.

For specific EEPROM recommendations, refer to the

EEPROM Guidelines posted on the PLX website,

http://www.plxtech.com/products/default.htm.

Figure 3-1. Serial EEPROM Memory Map

Table 3-1. Serial EEPROM Guidelines

Serial

EEPROM

PCI 9052

System Boot Condition

None Uses default values (Start bit is 1).

Programmed Boots with serial EEPROM values

(Start bit is 0).

Blank Detects a blank device and reverts

to default values (Start bit is 0).

Load Data

800 32h

1024 40h

# of bits

Empty

# of words

(16-bit data)

Section 3

Serial EEPROM Reset and Serial EEPROM Initialization

PCI 9052 Data Book, Version 2.0

3—Reset & Serial EEPROM

Note: Serial EEPROM values shown are register values for the PCI 9052RDK.

Table 3-2. Serial EEPROM Register Load Sequence

Serial

EEPROM

Offset

Serial

EEPROM

Value Description

0h PCI 02h 5201 Device ID

2h PCI 00h 10B5 Vendor ID

4h PCI 0Ah 0680 Class Code

6h PCI 08h 00xx Class Code (revision is not loadable)

8h PCI 2Eh 9050 Subsystem ID

Ah PCI 2Ch 10B5 Subsystem Vendor ID

Ch PCI 3Eh xxxx (Maximum Latency and Minimum Grant are not loadable)

Eh PCI 3Ch 01xx Interrupt Pin (Interrupt Line Routing is not loadable)

10h LOCAL 02h FFF0 MSW of Range for PCI-to-Local Address Space 0 (1 MB)

12h LOCAL 00h 0000 LSW of Range for PCI-to-Local Address Space 0 (1 MB)

14h LOCAL 06h FFFF MSW of Range for PCI-to-Local Address Space 1

16h LOCAL 04h FFF1 LSW of Range for PCI-to-Local Address Space 1

18h LOCAL 0Ah FFFE MSW of Range for PCI-to-Local Address Space 2

1Ah LOCAL 08h 0000 LSW of Range for PCI-to-Local Address Space 2

1Ch LOCAL 0Eh FFF0 MSW of Range for PCI-to-Local Address Space 3

1Eh LOCAL 0Ch 0000 LSW of Range for PCI-to-Local Address Space 3

20h LOCAL 12h 0000 MSW of Range for PCI-to-Local Expansion ROM (64 KB)

22h LOCAL 10h 0000 LSW of Range for PCI-to-Local Expansion ROM (64 KB)

24h LOCAL 16h 0000 MSW of Local Base Address (Remap) for PCI-to-Local Address Space 0

26h LOCAL 14h 0001 LSW of Local Base Address (Remap) for PCI-to-Local Address Space 0

28h LOCAL 1Ah 0000 MSW of Local Base Address (Remap) for PCI-to-Local Address Space 1

2Ah LOCAL 18h 0001 LSW of Local Base Address (Remap) for PCI-to-Local Address Space 1

2Ch LOCAL 1Eh 0100 MSW of Local Base Address (Remap) for PCI-to-Local Address Space 2

2Eh LOCAL 1Ch 0001 LSW of Local Base Address (Remap) for PCI-to-Local Address Space 2

30h LOCAL 22h 0200 MSW of Local Base Address (Remap) for PCI-to-Local Address Space 3

32h LOCAL 20h 0001 LSW of Local Base Address (Remap) for PCI-to-Local Address Space 3

34h LOCAL 26h 0000 MSW of Local Base Address (Remap) for PCI-to-Local Expansion ROM

36h LOCAL 24h 0000 LSW of Local Base Address (Remap) for PCI-to-Local Expansion ROM

38h LOCAL 2Ah 0040 MSW of Bus Region Descriptors for Local Address Space 0

3Ah LOCAL 28h 0022 LSW of Bus Region Descriptors for Local Address Space 0

3Ch LOCAL 2Eh 0000 MSW of Bus Region Descriptors for Local Address Space 1

3Eh LOCAL 2Ch 0022 LSW of Bus Region Descriptors for Local Address Space 1

40h LOCAL 32h 0080 MSW of Bus Region Descriptors for Local Address Space 2

42h LOCAL 30h 0001 LSW of Bus Region Descriptors for Local Address Space 2

44h LOCAL 36h 5421 MSW of Bus Region Descriptors for Local Address Space 3

46h LOCAL 34h 38E9 LSW of Bus Region Descriptors for Local Address Space 3

48h LOCAL 3Ah 0000 MSW of Bus Region Descriptors for Expansion ROM

4Ah LOCAL 38h 0000 LSW of Bus Region Descriptors for Expansion ROM

4Ch LOCAL 3Eh 0008 MSW of Chip Select (CS) 0 Base and Range

4Eh LOCAL 3Ch 0001 LSW of Chip Select (CS) 0 Base and Range

50h LOCAL 42h 0000 MSW of Chip Select (CS) 1 Base and Range

Section 3

Reset and Serial EEPROM Initialization Internal Registers

PCI 9052 Data Book, Version 2.0

3.4 INTERNAL REGISTERS

The PCI 9052 chip provides several internal registers,

allowing maximum flexibility in bus interface design

and performance. The register types are as follows:

•PCI Configuration registers (accessible from the

PCI Bus and serial EEPROM)

•Local Configuration registers (accessible from the

PCI Bus and serial EEPROM)

Note: Local Configuration register access can be limited to

Memory- or I/O-Mapped. Access can also be disabled by way of the

PCIBAR1 and PCIBAR0 Enable bits (CNTRL[13:12]). These bits

should not be disabled for the PC platform.

3.4.1 PCI Configuration Registers

Device and Vendor IDs. There are two sets of Device

and Vendor IDs. The Device ID and Vendor ID are

located at offset 00h of the PCI Configuration registers

(PCIIDR[31:16] and PCIIDR[15:0], respectively). The

Subsystem ID and Subsystem Vendor ID are located

at offsets 2Eh and 2Ch, respectively, of the PCI

Configuration registers (PCISID[15:0] and PCISVID

[15:0], respectively). The Device ID and Vendor ID

identify the particular device and its manufacturer. The

Subsystem Vendor ID and Subsystem ID provide a

way to distinguish between PCI interface chip vendors

and add-in board manufacturers, using a PCI chip.

Note: Subsystem ID and Subsystem Vendor ID registers at

Configuration offset 2Ch are writable by serial EEPROM only.

However, if a PCI master writes to these read-only registers,

the value is written to offset 3Ch, the PCI Interrupt Line register

(PCIILR), possibly disabling PCI interrupts originating from the

PCI 9052. (Refer to PCI 9052 Errata #3.)

Status. This register contains PCI Bus-related events

information.

Command. This register controls the ability of a

device to respond to PCI accesses. It controls whether

the device responds to I/O or Memory Space

accesses.

Class Code. This register identifies the general

function of the device. (Refer to PCI r2.2 for further

details.)

Revision ID. The value read from this register

represents the PCI 9052 current silicon revision.

Header Type. This register defines the device

configuration header format and whether the device is

single function or multi-function.

Note: Multiple functions are not supported.

Cache Line Size. This register defines the system

cache line size in units of 32-bit Lwords.

PCI Base Address for Memory Accesses to Local

Configuration Registers. The system BIOS uses this

Memory accesses to the PCI 9052 Local Configuration

registers. The PCI Address Range occupied by these

Configuration registers is fixed at 128 bytes. During

initialization, the Host writes FFFFFFFF to this

required Memory space of 128 bytes. The Host then

writes the base address to PCIBAR0[31:7].

52h LOCAL 40h 0009 LSW of Chip Select (CS) 1 Base and Range

54h LOCAL 46h 0101 MSW of Chip Select (CS) 2 Base and Range

56h LOCAL 44h 0001 LSW of Chip Select (CS) 2 Base and Range

58h LOCAL 4Ah 0208 MSW of Chip Select (CS) 3 Base and Range

5Ah LOCAL 48h 0001 LSW of Chip Select (CS) 3 Base and Range

5Ch LOCAL 4Eh 0000 MSW of Interrupt Control/Status

5Eh LOCAL 4Ch 1043 LSW of Interrupt Control/Status

60h LOCAL 52h 007C MSW of User I/O, Direct Slave Response, Serial EEPROM, and Initialization Control

62h LOCAL 50h 4252 LSW of User I/O, Direct Slave Response, Serial EEPROM, and Initialization Control

Table 3-2. Serial EEPROM Register Load Sequence (Continued)

Serial

EEPROM

Offset

Serial

EEPROM

Value Description

Section 3

Internal Registers Reset and Serial EEPROM Initialization

PCI 9052 Data Book, Version 2.0

3—Reset & Serial EEPROM

PCI Base Address for I/O Accesses to Local

Configuration Registers. The system BIOS uses

this register to assign a PCI address space segment

for I/O accesses to the PCI 9052 Local Configuration

registers. The PCI address range occupied by these

Configuration registers is fixed at 128 bytes. During

initialization, the host writes FFFFFFFF to this register,

then reads back FFFFFF81, determining a required

128 bytes of I/O space. The Host then writes the base

address to PCIBAR1[31:7].

PCI Base Address for Accesses to Local Address

Spaces 0, 1, 2, and 3. The system BIOS uses these

registers to assign a PCI address space segment for

accesses to Local Address Space 0, 1, 2, and 3. The

PCI address range occupied by this space is

determined by the Local Address Space Range

registers. During initialization, the host writes

FFFFFFFF to these registers, then reads back a value

determined by the range. The Host then writes the

base address to the upper bits of these registers.

PCI Expansion ROM Base Address. The system

BIOS uses this register to assign a PCI address space

segment for accesses to the Expansion ROM. The

PCI address range occupied by this space is

determined by the Expansion ROM Range register.

During initialization, the host writes FFFFFFFF to this

range. The Host then writes the base address to the

upper bits of this register.

PCI Interrupt Line. This register identifies where the

device interrupt line connects on the system interrupt

controller(s).

PCI Interrupt Pin. This register specifies the interrupt

request pin (if any) to be used.

3.4.2 PCI Bus Access to

Internal Registers

The PCI 9052 PCI Configuration registers are

accessed from the PCI Bus with a Type 0

Configuration cycle.

The PCI 9052 Local Configuration registers are

accessed by one of the following:

•A Memory cycle, with the PCI Bus address

matching the base address specified in the PCI

Base Address register for Memory Accesses to

Local Configuration registers (PCIBAR0)

•An I/O cycle, with the PCI Bus address matching

the base address specified in the PCI Base

Address register for I/O Accesses to Local

Configuration registers (PCIBAR1)

All PCI Read or Write accesses to the PCI 9052

registers can be Byte, Word, or Lword accesses.

Memory accesses to the PCI 9052 registers can be

burst or non-burst. The PCI 9052 responds with a PCI

Bus disconnect for all Burst I/O accesses to the

PCI 9052 registers.

Section 3

Reset and Serial EEPROM Initialization Timing Diagrams

PCI 9052 Data Book, Version 2.0

3.5 TIMING DIAGRAMS

Note: Serial EEPROM initialization completes in approximately 780 µs, with a 33.3 MHz PCI clock.

Timing Diagram 3-1. Initialization from Serial EEPROM

Timing Diagram 3-2. PCI RST# Asserting Local Output LRESET#

1 1 0 A5A4A3A2A1

D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D

D15 D14 D13 D12D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 D15

DEVICE ID (PCIIDR[31:16])

VENDOR ID (PCIIDR[15:0])

D14 D13 D12 D11 D10D9 D8 D7 D6 D5 D4 D3

CLASS CODE (PCICR[31:16])

CONTINUES

D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

START BIT 0 INDICATES SERIAL EEPROM PRESENT ----|

LAST WORD (CNTRL[15:0])

CONTINUES

0us 5us 10us 15us 20us 25us

EESK

LRESETo#

EECS

EEDI

EEDO

EESK

EEDO

EESK (continues)

EECS

EEDO

Asynchronous

Asynchronous to LCLK

0ns 50ns 100ns 150ns 200ns

CLK

RST#

LCLK

LRESET#

PCI 9052 Data Book, Version 2.0

4—PCI Target (Direct Slave)

4 DIRECT SLAVE OPERATION

The functional operation described can be modified

through the PCI 9052 programmable internal

registers.

4.1 OVERVIEW

Direct Slave operations originate on the PCI Bus, go

through the PCI 9052, and finally access the Local

Bus. The PCI 9052 is a PCI Bus slave and a Local Bus

master.

4.2 DIRECT DATA TRANSFER MODE

The PCI 9052 supports Direct Slave accesses to Local

Memory by way of Memory or I/O transfers.

4.2.1 Direct Slave Operation (PCI

Master-to-Local Bus Access)

The PCI 9052 supports Burst Memory-Mapped

Transfer accesses and single Memory- or I/O-Mapped

Transfer accesses to the Local Bus from the PCI Bus

through an 8-Lword (32-byte) Direct Slave Read FIFO

and a 16-Lword (64-byte) Direct Slave Write FIFO.

The PCI Base Address registers are provided to set up

the adapter location in the PCI Memory and I/O space.

In addition, Local Mapping registers allow address

translation from the PCI Address Space to the Local

Address Space. The following five spaces

are available:

•Space 0

•Space 1

•Space 2

•Space 3

•Expansion ROM

Expansion ROM is intended to support a bootable

ROM device for the Host.

For single cycle Direct Slave reads, the PCI 9052

reads a single Local Bus Lword or partial Lword. The

PCI 9052 disconnects after one transfer for all

Direct Slave I/O accesses.

Note: If no PCI Byte Enables (C/BE[3:0]#) are asserted with an I/O

Command access, the PCI 9052 issues a Target Abort.

For higher data transfer rates, the PCI 9052 can be

programmed to prefetch data during a PCI Burst read.

The Prefetch size, when enabled, can be 4, 8, or 16

Lwords, or until the PCI Bus stops requesting. When

the PCI 9052 prefetches, if enabled, it drops the Local

Bus read after reaching the prefetch count. In

Continuous Prefetch mode, the PCI 9052 prefetches

as long as FIFO space is available and stops

prefetching when the PCI Bus terminates the request.

If Read prefetching is disabled, the PCI 9052 stops

after one Read transfer.

In addition to Prefetch mode, the PCI 9052 supports

Direct Slave Read Ahead mode. (Refer to

Section 4.2.1.3.)

Each Local space can be programmed to operate in

an 8-, 16-, or 32-bit Local Bus width. The PCI 9052

contains an internal wait state generator and external

wait state input, LRDYi#. LRDYi# can be disabled or

enabled by way of the Internal Configuration registers.

With or without wait state(s), the Local Bus,

independent of the PCI Bus, can:

•Burst as long as data is available

(Continuous Burst mode)

•Burst four Lwords at a time (Burst-4 Lword mode)

•Perform continuous single cycles

4.2.1.1 Direct Slave Lock

The PCI 9052 supports direct PCI-to-Local Bus

Exclusive accesses (locked atomic operations). A

PCI-locked operation to the Local Bus results in the

entire Local Address Spaces 0, 1, 2, and 3, and

Expansion ROM being locked until they are released by

the PCI Bus Master. Locked operations are enabled or

disabled with the Direct Slave LOCK# Enable bit

(CNTRL[23]) for PCI-to-Local accesses.

It is the responsibility of external arbitration logic to

monitor the LLOCKo# pin and enforce the meaning for

an atomic operation. For example, if a local master

initiates a locked operation, the local arbiter may

choose to not grant use of the Local Bus to other

masters until the locked operation is complete.

Section 4

Direct Slave Operation Direct Data Transfer Mode

PCI 9052 Data Book, Version 2.0

4.2.1.2 PCI r2.1 Features Enable

The PCI 9052 can be programmed through the

PCI r2.1 Features Enable bit (CNTRL[14]) to perform

all PCI Read/Write transactions in compliance with

PCI r2.1. The following PCI 9052 behavior occurs

when CNTRL[14]=1.

4.2.1.2.1 Direct Slave Delayed Read Mode

Operation

PCI Bus single cycle aligned or unaligned 32-bit

Direct Slave Read transactions always result in a

one-Lword single-cycle transfer on the Local Bus, with

corresponding Local Byte Enables (LBE[3:0]#)

asserted to reflect PCI Byte Enables (C/BE[3:0]#),

unless the PCI Read No Flush Mode bit is enabled

(CNTRL[16]=1). (Refer to Section 4.2.1.3.) This

causes the PCI 9052 to Retry all PCI Bus Read

requests that follow, until the original PCI Address

and/or Byte Enables (C/BE[3:0]#) are matched. (Refer

to Figure 4-1.)

Figure 4-1. Direct Slave Delayed Read Mode

Note: The figure represents a sequence of Bus cycles.

4.2.1.2.2 32000 PCI Clock Timeout

If the PCI Master does not complete the originally

requested Direct Slave Delayed Read transfer, the

PCI 9052 flushes the Direct Slave Read FIFO after

32000 PCI clocks and grants an access to a new

Direct Slave Read access. The PCI 9052 Retries all

other Direct Slave Read accesses that occur before

the 32000 PCI clock timeout.

4.2.1.2.3 PCI r2.1 16- and 8-Clock Rule

The PCI 9052 guarantees that if the first Direct Slave

Write data cannot be accepted by the PCI 9052 and/or

the first Direct Slave Read data cannot be returned by

the PCI 9052 within 16 PCI clocks from the beginning

of the Direct Slave cycle (FRAME# asserted), the

PCI 9052 issues a Retry (STOP# asserted) to the

PCI Bus.

During successful Direct Slave Read and/or Write

accesses, the subsequent data after the first access is

accepted for writes or returned for reads in eight PCI

clocks (TRDY# asserted). Otherwise, the PCI 9052

issues a PCI disconnect (STOP# asserted) to the PCI

Master.

In addition, setting the PCI r2.1 Features Enable bit

[CNTRL[14]=1) allows optional enabling of the

following PCI r2.1 functions:

•No write while a Delayed Read is pending

(PCI Retries for writes) (CNTRL[17])

•Write and flush pending Delayed Read

(CNTRL[15])

4.2.1.3 Direct Slave Read Ahead Mode

The PCI 9052 also supports Direct Slave Read Ahead

mode (CNTRL[16]), where prefetched data can be

read from the PCI 9052 internal FIFO instead of the

Local Bus. The address must be subsequent to the

previous address and 32-bit aligned (next address =

current address + 4). The Direct Slave Read Ahead

mode functions can be used with or without

Direct Slave Delayed Read mode. (Refer to

Figure 4-2.)

Read Ahead mode requires that Prefetch be enabled

in the LASxBRD registers (where x is the Local

Address Space number) for the Memory-Mapped

spaces that use Read Ahead mode. The PCI 9052

flushes its Read FIFO for each I/O-Mapped access.

PCI r2.1

Features Enable

bit set in

Internal registers

Data is stored

in 16-Lword

Internal FIFO

PCI 9052 returns

prefetched data

immediately

PCI Read request

PCI 9052

instructs PCI Host

to Retry Read

cycle later

PCI Bus is free to

perform other

cycles during

this time

PCI Host returns to

fetch Read data

again

Read data is now

ready for Host

PCI 9052 request

Read data from

Local Bus

Local memory

returns requested

data to PCI 9052

PCI Bus Local Bus

PCI 9052

Section 4

Direct Data Transfer Mode Direct Slave Operation

PCI 9052 Data Book, Version 2.0

4—PCI Target (Direct Slave)

Figure 4-2. Direct Slave Read Ahead Mode

Note: The figure represents a sequence of Bus cycles.

4.2.1.4 Direct Slave Transfer

A PCI Bus Master addressing the Memory space

decoded for the Local Bus initiates transactions. Upon

a PCI Read/Write, the PCI 9052 being a Local Bus

Master executes a transfer, at which time it reads data

into the Direct Slave Read FIFO or writes data to the

Local Bus.

For a PCI Direct access to the Local Bus, the

PCI 9052 has a 16-Lword (64-byte) Write FIFO

and an 8-Lword (32-byte) Read FIFO. The FIFOs

enable the Local Bus to operate independently of the

PCI Bus.

For Write transfers, if the Write FIFO becomes full, the

PCI 9052 is programmable to disconnect, or retain the

PCI Bus while generating wait states (TRDY#

de-asserted) (CNTRL[18]).

For PCI Read transactions from the Local Bus, the

PCI 9052 holds off TRDY# while gathering data from

the Local Bus. For Read accesses mapped to PCI

Memory space, the PCI 9052 prefetches up to

16 Lwords (in Continuous Prefetch mode) from the

Local Bus. Unused Read data is flushed from the

FIFO. For Read accesses mapped to PCI I/O space,

the PCI 9052 does not prefetch Read data. Rather, it

breaks each read of a Burst cycle into a single

Address/Data cycle on the Local Bus.

The PCI Direct Slave Retry Delay Clocks bits

(CNTRL[22:19]) can be used to program the period of

time in which the PCI 9052 holds off TRDY#. The

PCI 9052 issues a Retry to the PCI Bus Transaction

Master when the programmed time period expires.

This occurs when the PCI 9052 cannot gain Local Bus

control and return TRDY# within the programmed time

period or the Local Bus is slowly emptying the Write

FIFO, and filling the Read FIFO.

The PCI 9052 supports on-the-fly Endian conversion

for Local Address Spaces 0, 1, 2, and 3, and

Expansion ROM. The Local Bus can be Big/Little

Endian by using the programmable internal register

configuration.

Note: The PCI Bus is always Little Endian.

Figure 4-3. Direct Slave Write

Figure 4-4. Direct Slave Read

Note: The figures represent a sequence of Bus cycles.

PCI Read request

Read data

PCI Master read

returns with

“Sequential Address”

PCI 9052 prefetches

data from Local Bus

device

Direct Slave

Read Ahead mode

is set in

Internal Registers

Prefetched data

is stored in

internal FIFO

PCI 9052 returns

prefetched data

immediately from

internal FIFO

without reading again

from local side

PCI 9052 prefetches

more data if FIFO

space is available

PCI 9052 prefetches

more data from

Local memory

PCI Bus Local Bus

PCI 9052

PCI

9052

LA, ADS#,

LW/R#. WR#

IRDY#, AD (data)

PCI Bus

Local Bus

LRDYi#

DEVSEL#, TRDY#

FRAME#, C/BE#,

AD (addr)

Slave Master

Master Slave

LD, BLAST#

PCI

9052

LA, ADS#, LW/R#,

WR#, BLAST#

TRDY#, AD (data)

PCI Bus

LRDYi#, LD

DEVSEL#

FRAME#, C/BE#,

AD (addr)

IRDY#

Slave Master

Master Slave

PCI Bus

Local Bus

Section 4

Direct Slave Operation Direct Data Transfer Mode

PCI 9052 Data Book, Version 2.0

4.2.1.5 Direct Slave PCI-to-Local

Address Mapping

Five Local Address spaces—Spaces 0, 1, 2, and 3,

and Expansion ROM—are accessible from the PCI

Bus. Each is defined by a set of three registers:

•Local Address Range—LAS0RR, LAS1RR,

LAS2RR, LAS3RR, and/or EROMRR

•Local Base Address—LAS0BA, LAS1BA,

LAS2BA, LAS3BA, and/or EROMBA

•PCI Base Address—PCIBAR2, PCIBAR3,

PCIBAR4, PCIBAR5, and/or PCIERBAR

A fourth register, the Bus Region Descriptor register

for PCI-to-Local Accesses (LAS0BRD, LAS1BRD,

LAS2BRD, LAS3BRD, and/or EROMBRD), defines

the Local Bus characteristics for the Direct Slave

regions. (Refer to Figure 4-5.)

Each PCI-to-Local Address space is defined as part of

reset initialization. (Refer to Section 4.2.1.5.1.) These

Local Bus characteristics can be modified at any time

before actual data transactions.

4.2.1.5.1 Direct Slave Local Bus

Initialization

Range—Specifies the PCI Address bits to use for

decoding a PCI access to Local Bus space. Each bit

corresponds to a PCI Address bit. Bit 31 corresponds

to address bit 31. Write 1 to all bits required to be

included in decode, and 0 to all others.

Remap PCI-to-Local Addresses into a Local

Address Space—Bits in this register remap (replace)

the PCI Address bits used in decode as the Local

Address bits.

Local Bus Region Descriptor—Specifies the Local

Bus characteristics.

4.2.1.5.2 Direct Slave Initialization

After a PCI reset and serial EEPROM load, the

software determines the amount of required address

space by writing all ones (1) to a PCI Base Address

PCI 9052 returns zeros (0) in the Don’t Care Address

bits, effectively specifying the address space required,

at which time the PCI software maps the Local

Address space into the PCI Address space by

programming the PCI Base Address register.

Section 4

Direct Data Transfer Mode Direct Slave Operation

PCI 9052 Data Book, Version 2.0

4—PCI Target (Direct Slave)

Figure 4-5. Local Bus Direct Slave Access

PCI Bus

Master

Serial

EEPROM

FIFOs

64-Byte Deep Write

32-Byte Deep Read

Range for PCI-to-Local Address Space 0, 1, 2, and 3

Local Base Address (Remap) for PCI-to-Local Address

Space 0, 1, 2, and 3

Bus Region Descriptors for PCI-to-Local Accesses

Range for PCI-to-Local Expansion ROM

Local Base Address (Remap) for PCI-to-Local Expansion ROM

PCI Base Address-to-Local Address Space 0, 1, 2, or 3

Bus Region Descriptors for PCI-to-Local Accesses

PCI Base Address-to-Local Expansion ROM

Initialize Local

Configuration

Registers

Initialize PCI

Base Address

PCI

Address

Space

PCI

Base

Address

Local Bus

Access

Local

Memory

Local

Base

Address

Range

PCI Bus

Access

Local Bus

Hardware

Characteristics

Section 4

Direct Slave Operation Direct Data Transfer Mode

PCI 9052 Data Book, Version 2.0

4.2.1.5.3 Direct Slave Example

A 1 MB prefetchable Local Address Space

encompassing Local Bus Addresses 01200000h

through 012FFFFFh is to be configured for Local

Address Space 0. Assume the BIOS System

Resource Manager allocates 1 MB with a PCI Base

Address of 34500000h. The Local memory is then

accessible at PCI Addresses 34500000h through

345FFFFFh.

a. Program the serial EEPROM as follows:

•Range—FFF00008h [1 MB, decode the upper

12 PCI Address bits, and set the Prefetchable

bit (LAS0RR[3]=1)].

•Local Base Address (Remap)—01200001h

(Local Base Address for PCI-to-Local

accesses). Bit 0 must be set to enable address

decoding (LAS0BA[0]=1).

b. PCI Initialization software writes all ones (1) to the

PCI Base Address register, then reads it back.

•The PCI 9052 returns a value of FFF00008h,

after which the PCI software writes the base

address it assigned into the PCI Base Address

•PCI Base Address—34500008h (PCI Base

Address for Access to Local Address Space 0

always aligned on a boundary determined by

address space size. The Prefetchable bit is set

(PCIBAR2[3]=1).

4.2.1.5.4 Direct Slave Byte Enables

(Non-Multiplexed Mode)

During a Direct Slave transfer, each of five spaces—

Spaces 0, 1, 2, and 3, and Expansion ROM—can be

programmed to operate in an 8-, 16-, or 32-bit Local

Bus width by encoding the Local Byte Enables

(LBE[3:0]#).

LBE[3:0]# are encoded, based on the configured bus

width, as follows.

32-Bit Bus—The four byte enables indicate which of

the four bytes are active during a Data cycle:

•LBE3# Byte Enable 3—LAD[31:24]

•LBE2# Byte Enable 2—LAD[23:16]

•LBE1# Byte Enable 1—LAD[15:8]

•LBE0# Byte Enable 0—LAD[7:0]

16-Bit Bus—LBE[3, 1:0]# are encoded to provide

BHE#, LA1, and BLE#, respectively:

•LBE3# Byte High Enable (BHE#)—LAD[15:8]

•LBE2# not used

•LBE1# Address bit 1 (LA1)

•LBE0# Byte Low Enable (BLE#)—LAD[7:0]

8-Bit Bus—LBE[1:0]# are encoded to provide LA1

and LA0, respectively:

•LBE3# not used

•LBE2# not used

•LBE1# Address bit 1 (LA1)

•LBE0# Address bit 0 (LA0)

Note: In ISA Interface mode (MODE=0 and INTCSR[12]=1), pins

46 through 49 have dual functionality, providing LBE[3:0]# for Local

Address Spaces 2 and 3 and Expansion ROM, while providing

ISAA0, ISAA1, and SBHE# signals for Local Address Spaces 0

and 1 (ISA Memory and I/O).

4.2.1.5.5 Direct Slave Byte Enables

(Multiplexed Mode)

During a Direct Slave transfer, each of five spaces—

Spaces 0, 1, 2, and 3, and Expansion ROM—can be

programmed to operate in an 8-, 16-, or 32-bit Local

Bus width by encoding the Local Byte Enables

(LBE[3:0]#).

LBE[3:0]# are encoded, based on the configured Bus

width, as follows.

32-Bit Bus—The four byte enables indicate which of

the four bytes are active during a Data cycle:

•LBE3# Byte Enable 3—LAD[31:24]

•LBE2# Byte Enable 2—LAD[23:16]

•LBE1# Byte Enable 1—LAD[15:8]

•LBE0# Byte Enable 0—LAD[7:0]

16-Bit Bus—LBE[3, 1:0]# are encoded to provide

BHE#, LAD1, and BLE#, respectively:

•LBE3# Byte High Enable (BHE#)—LAD[15:8]

•LBE2# not used

•LBE1# Address bit 1 (LAD1)

•LBE0# Byte Low Enable (BLE#)—LAD[7:0]

Section 4

Response to FIFO Full or Empty Direct Slave Operation

PCI 9052 Data Book, Version 2.0

4—PCI Target (Direct Slave)

8-Bit Bus—LBE[1:0]# are encoded to provide

LAD[1:0], respectively:

•LBE3# not used

•LBE2# not used

•LBE1# Address bit 1 (LAD1)

•LBE0# Address bit 0 (LAD0)

During the address phase, LAD[1:0] are valid address

bits with the same value as LBE[1:0]#.

4.3 RESPONSE TO FIFO

FULL OR EMPTY

Table 4-1 lists the PCI 9052 response to full or empty

FIFOs.

Table 4-1. Response to FIFO Full or Empty

Mode Direction FIFO PCI Bus Local Bus

Direct Slave Write PCI-to-Local

Full Disconnect or Throttle TRDY#1

1. Throttle TRDY# depends on the PCI Direct Slave Retry Delay Clocks (CNTRL[22:19]).

De-assert LHOLDA if Local Bus is busy

and wait for LHOLD to be de-asserted

Empty Normal Normal, assert BLAST#

Direct Slave Read Local-to-PCI

Full Normal Normal, assert BLAST#

Empty Disconnect or Throttle TRDY#1Normal

Section 4

Direct Slave Operation Timing Diagrams

PCI 9052 Data Book, Version 2.0

4.4 TIMING DIAGRAMS

Timing Diagram 4-1. PCI 9052 Local Bus Arbitration

Should not be re-asserted until LHOLDA goes low

Local Bus Master

Drives the Bus

PCI 9052 Drives the Local BusPCI 9052 Drives

the Local Bus

0ns 250ns 500ns

LCLK

LHOLD

LHOLDA

LOCAL BUS

Section 4

Timing Diagrams Direct Slave Operation

PCI 9052 Data Book, Version 2.0

4—PCI Target (Direct Slave)

4.4.1 Serial EEPROM and Configuration Initialization

Timing Diagram 4-2. PCI RST# Asserting Local Output LRESET#

Note: Serial EEPROM initialization completes in approximately 780 µs, with a 33.3 MHz PCI clock.

Timing Diagram 4-3. Initialization from Serial EEPROM

Asynchronous

Asynchronous to LCLK

0ns 50ns 100ns 150ns 200ns

CLK

RST#

LCLK

LRESET#

1 1 0 A5A4A3A2A1

D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D00

D15 D14 D13 D12D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 D15

DEVICE ID (PCIIDR[31:16])

VENDOR ID (PCIIDR[15:0])

D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3

CLASS CODE (PCICR[31:16])

CONTINUES

D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

START BIT 0 INDICATES SERIAL EEPROM PRESENT ----|

LAST WORD (CNTRL[15:0])

CONTINUES

0us 5us 10us 15us 20us 25us

EESK

LRESETo#

EECS

EEDI

EEDO

EESK

EEDO

EESK (continues)

EECS

EEDO

Section 4

Direct Slave Operation Timing Diagrams

PCI 9052 Data Book, Version 2.0

Timing Diagram 4-4. PCI Configuration Write to PCI Configuration Register

Timing Diagram 4-5. PCI Configuration Read from PCI Configuration Register

1 2 3

ADDR

5 6 7

CMD=B

Data

0ns 50ns 100ns 150ns 200ns 250ns

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

1 2 3

ADDR

5 6 7

CMD=A

Data Read

0ns 50ns 100ns 150ns 200ns 250ns 300

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

Section 4

Timing Diagrams Direct Slave Operation

PCI 9052 Data Book, Version 2.0

4—PCI Target (Direct Slave)

Timing Diagram 4-6. PCI Memory Write to Local Configuration Register

Timing Diagram 4-7. PCI Memory Read from Local Configuration Register

123

ADDR

5 6 7

CMD=7

Data

0ns 50ns 100ns 150ns 200ns 250ns

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

1 2 3

ADDR

5 6 7

CMD=6

Data Read

0ns 50ns 100ns 150ns 200ns 250ns

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

Section 4

Direct Slave Operation Timing Diagrams

PCI 9052 Data Book, Version 2.0

Timing Diagram 4-8. Local Level-Triggered LINTi/LINTi2 Asserting PCI Output INTA#

CMD BYTE ENABLES

ADDR

LINTi1, LINTi2 ARE ACTIVE HIGH

RESPONSE ON THE PCI BUS

DATA

INTCSR[2]=1 INDICATES LINTi1 IS ACTIVE

LINTi1, LINTi2 ARE ACTIVE LOW

0ns 100ns 200ns 300ns 400ns

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

INTA#

LCLK

LINTi1, LINTi2

Section 4

Timing Diagrams Direct Slave Operation

PCI 9052 Data Book, Version 2.0

4—PCI Target (Direct Slave)

Timing Diagram 4-9. Local Edge-Triggered Interrupt Asserting PCI Interrupt

CMD BE

ADDR

Response on the PCI Bus

DATA

Cleared by Configuration Register

0ns 100ns 200ns 300ns 400ns 500

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

INTA#

LCLK

LINTi[2:1]

is asynchronous to both PCI and Local Clocks

Section 4

Direct Slave Operation Timing Diagrams

PCI 9052 Data Book, Version 2.0

Timing Diagram 4-10. USER[3:0] as Inputs

CMD

A D D

CMD

BIT[2]=1 A

CMD

USER0 IS INPUT

USER[3:0] PINS ARE INPUTS

DATA DATA

BIT[2]=0

0ns 250ns 500ns 750ns 1000ns 1250ns

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

LCLK

LHOLD

LHOLDA

ADS#

BLAST#

LA[27:2]

LAD[31:0]

LRDYi#

USER[3:0]

Section 4

Timing Diagrams Direct Slave Operation

PCI 9052 Data Book, Version 2.0

4—PCI Target (Direct Slave)

Timing Diagram 4-11. USER[3:0] as Outputs

CMD

A D D

CMD

BIT[5]=0 A

CMD

BIT[5]=1A

USER0 SET AS OUTPUT

USER[3:0] PINS ARE OUTPUTS

DATA DATA

0ns 250ns 500ns 750ns 1000ns 1250ns

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

LCLK

LHOLD

LHOLDA

ADS#

BLAST#

LA[27:2]

LAD[31:0]

LRDYi#

USER[3:0]

Section 4

Direct Slave Operation Timing Diagrams

PCI 9052 Data Book, Version 2.0

Note: CS[3:0]# Base Address is in the range of Spaces 3 through 0

Timing Diagram 4-12. Chip Select [3:0]#

CMD BE

ADDR D0 D1 D2 D3

ADDR +4 +8 +12

D0 D1 D2 D3

LBE

0ns 100ns 200ns 300ns 400ns

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

LCLK

LHOLD

LHOLDA

ADS#

BLAST#

LA[27:2]

LAD[31:0]

LRDYi#

CS[3:0]#

LBE[3:0]#

WR#

RD#

LW/R#

Section 4

Timing Diagrams Direct Slave Operation

PCI 9052 Data Book, Version 2.0

4—PCI Target (Direct Slave)

4.4.2 Non-Multiplexed Mode Local Bus

Note: Single write, 32-bit Local Bus, without wait states

Space 0 is mapped to I/O

Address-to-data = zero wait states

Data-to-data = zero wait states

Read strobe delay = zero wait states

Timing Diagram 4-13. Non-Multiplexed Mode, Direct Slave Single Write without Wait States (32-Bit Local Bus)

ADDR

CMD BE

DATA

ADDR A+4

LBE

0ns 100ns 200ns 300ns

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

PERR#

STOP#

LCLK

LHOLD

LHOLDA

ADS#

BLAST#

LA[27:2]

LAD[31:0]

LBE[3:0]#

LRDYi#

USER0/WAITO#

RD#

WR#

LW/R#

Section 4

Direct Slave Operation Timing Diagrams

PCI 9052 Data Book, Version 2.0

Note: Single read, 32-bit Local Bus, without wait states

Space 0 is mapped to I/O

Address-to-data = zero wait states

Data-to-data = zero wait states

Read strobe delay = zero wait states

Timing Diagram 4-14. Non-Multiplexed Mode, Direct Slave Single Read without Wait States (32-Bit Local Bus)

ADDR

CMD BE

ADDR A+4

LBE

DATA

0ns 100ns 200ns 300ns 400ns

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

PERR#

STOP#

LCLK

LHOLD

LHOLDA

ADS#

BLAST#

LA[27:2]

LAD[31:0]

LBE[3:0]#

LRDYi#

USER0/WAITO#

RD#

WR#

LW/R#

Section 4

Timing Diagrams Direct Slave Operation

PCI 9052 Data Book, Version 2.0

4—PCI Target (Direct Slave)

Note: Single read, 32-bit Local Bus, with wait states

Space 0 is mapped to I/O

Address-to-data = zero wait states (NRAD)

Data-to-data = zero wait states (NRDD)

Read strobe delay = zero wait states

Timing Diagram 4-15. Non-Multiplexed Mode, Direct Slave Single Read with External (LRDYi#)

Wait States (32-Bit Local Bus)

ADDR

CMD BE

ADDR +4

LBE

0ns 100ns 200ns 300ns 400ns

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

PERR#

STOP#

LCLK

LHOLD

LHOLDA

ADS#

ALE

BLAST#

LA[27:2]

LAD[31:0]

LBE[3:0]#

LRDYi#

USER0/WAITO#

RD#

WR#

LW/R#

Section 4

Direct Slave Operation Timing Diagrams

PCI 9052 Data Book, Version 2.0

Note: Non-Burst write of four Lwords

32-bit Local Bus, BTERM# is disabled

Address-to-data = five NWAD wait states

Data-to-data = one NWDD wait state

Write strobe delay = three wait states

Write cycle hold = two wait states

Timing Diagram 4-16. Non-Multiplexed Mode, Direct Slave Non-Burst Write with Wait States (32-Bit Local Bus)

ADDR

CMD

ADDR

LBE

D1D2 D3

ADDRESS-TO-DATA WAIT STATES

WRITE STROBE DELAY

+4 +8 +C

D3D2D1

0ns 250ns 500ns 750ns 1000ns 1250ns

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

PERR#

STOP#

LCLK

LHOLD

LHOLDA

ADS#

ALE

BLAST#

LA[27:2]

LAD[31:0]

LBE[3:0]#

LRDYi#

WAITO#

RD#

WR#

LW/R#

Section 4

Timing Diagrams Direct Slave Operation

PCI 9052 Data Book, Version 2.0

4—PCI Target (Direct Slave)

Note: Non-Burst write of five Lwords

8-bit Local Bus

Address-to-data = one NWAD wait state

Data-to-data = zero NWDD wait states

Write strobe delay = two wait states, WR# not asserted because the delay is not ≤ NWAD

Write hold cycle = one wait state

Timing Diagram 4-17. Non-Multiplexed Mode, Direct Slave Non-Burst Write (8-Bit Local Bus)

ADDR

CMD

ADDR

D1 D2 D3

C D E

F C D E

0ns 250ns 500ns 750ns 1000ns

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

PERR#

STOP#

LCLK

LHOLD

LHOLDA

ADS#

BLAST#

LA[27:2]

LAD[31:0]

LBE[3:0]#

LRDYi#

BTERM#

RD#

WR#

LW/R#

WAITO#

Section 4

Direct Slave Operation Timing Diagrams

PCI 9052 Data Book, Version 2.0

Note: Direct Slave read from Space 1

Burst disabled

Local Bus: Little Endian, 32-bit

Data-to-address = three NXDA wait states

Write strobe delay = zero wait states

Write cycle hold = zero wait states

Timing Diagram 4-18. Non-Multiplexed Mode, Direct Slave Non-Burst Read (32-Bit Local Bus)

ADDR

CMD

D0 D1

ADDR +4 +8 +c +10

3 DATA-TO-ADDRESS WAIT STATES

D0 D1

D2 D4D3

D2 D3

LBE

<------- 12 PCI CLK if no prefetch ------------------------>

<------- 14 PCI CLK if 4 Lword prefetch -------------->

<------- 15 PCI CLK if 8 or more Lword prefetch -->

0ns 250ns 500ns 750ns

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

LCLK

LHOLD

LHOLDA

ADS#

ALE

BLAST#

LA[27:2]

LAD[31:0]

LRDYi#

LBE[3:0]#

BTERM#

RD#

WR#

LW/R#

Section 4

Timing Diagrams Direct Slave Operation

PCI 9052 Data Book, Version 2.0

4—PCI Target (Direct Slave)

Note: Address-to-data = two NRAD wait states

Data-to-data = zero wait states

Read strobe delay = zero wait states

Timing Diagram 4-19. Non-Multiplexed Mode, Direct Slave Non-Burst Read

with Unaligned PCI Address (16-Bit Local Bus)

ADDR

CMD C/BE[3:0]#

ADDR

DATA

ONLY ONE LWORD TRANSFERRED

ADDRESS-TO-DATA WAIT STATES

D0[15:0] D0[31:16]

A+4

LBE LBE LBE

0ns 250ns 500ns

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

PERR#

STOP#

LCLK

LHOLD

LHOLDA

ADS#

BLAST#

LA[27:2]

LAD[31:0]

LBE[3:0]#

LRDYi#

WAITO#

BTERM#

RD#

WR#

LW/R#

Section 4

Direct Slave Operation Timing Diagrams

PCI 9052 Data Book, Version 2.0

Note: 16-bit Local Bus

Non-burst read of four Lwords

Prefetch four Lwords

Address-to-data = one NRAD wait state

Data-to-data = one NRDD wait state

Read strobe delay = one wait state

Timing Diagram 4-20. Non-Multiplexed Mode, Direct Slave Non-Burst Read with Prefetch (16-Bit Local Bus)

CMD

ADDR

A+4 A+8

6 4 6 4 6 4

D0[15:0] D0[31:16] D1[15:0] D1[31:16] D2[15:0] D2[31:16] D3[15:0] D3[31:16]

D0 D1 D2 D3

READ STROBE DELAY

ADDRESS-TO-DATA WAIT STATE

BE BE BE

A+C

0ns 250ns 500ns 750ns 1000ns

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

PERR#

STOP#

LCLK

LHOLD

LHOLDA

ADS#

ALE

BLAST#

LA[27:2]

LAD[31:0]

LBE[3:0]#

LRDYi#

LW/R#

WAITO#

BTERM#

RD#

WR#

Section 4

Timing Diagrams Direct Slave Operation

PCI 9052 Data Book, Version 2.0

4—PCI Target (Direct Slave)

Timing Diagram 4-21. Non-Multiplexed Mode, Direct Slave Non-Burst Read

with Continuous Prefetch (8-Bit Local Bus)

ADDR

CMD

ADDR

D1 D2 D3

C D E F C D E F C D E F C D E F C D E F C D E F

0ns 500ns 1000ns 1500ns

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

PERR#

STOP#

LCLK

LHOLD

LHOLDA

ADS#

ALE

BLAST#

LA[27:2]

LAD[31:0]

LBE[3:0]#

LRDYi#

BTERM#

WR#

RD#

LW/R#

WAITO#

Section 4

Direct Slave Operation Timing Diagrams

PCI 9052 Data Book, Version 2.0

Timing Diagram 4-22. Non-Multiplexed Mode, Direct Slave Burst Write

with Delayed Local Bus (32-Bit Local Bus)

CMD BE

ADDR +4 +8 +C

ADDR D0 D1 D2 D3

D0 D1 D2 D3

+10

LBE

DELAYED LOCAL BUS

0ns 250ns 500ns

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

LCLK

LHOLD

LHOLDA

ADS#

BLAST#

LA[27:2]

LAD[31:0]

LBE[3:0]#

LRDYi#

RD#

WR#

LW/R#

Section 4

Timing Diagrams Direct Slave Operation

PCI 9052 Data Book, Version 2.0

4—PCI Target (Direct Slave)

Note: Burst enabled (Burst write of four Lwords)

Address-to-data = four NWAD wait states

Data-to-data = two NWDD wait states

Write strobe delay = one wait state

Write cycle hold = zero wait states

Timing Diagram 4-23. Non-Multiplexed Mode, Direct Slave Burst Write with Wait States (16-Bit Local Bus)

ADDR

CMD

ADDR

D1 D2 D3

4 6 4 6 4 6 4 6

D0[15:0] D0[31:16] D1[15:0] D1[31:16] D2[15:0] D2[31:16] D3[15:0] D3[31:16]

+4 +8 +C

0ns 250ns 500ns 750ns 1000ns

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

PERR#

STOP#

LCLK

LHOLD

LHOLDA

ADS#

BLAST#

LA[27:2]

LAD[31:0]

LBE[3:0]#

LRDYi#

WAITO#

RD#

WR#

LW/R#

Section 4

Direct Slave Operation Timing Diagrams

PCI 9052 Data Book, Version 2.0

Note: Local Bus: Little Endian, 32-bit

Burst enabled (Burst write of four Lwords)

BTERM# disabled

Data-to-address = two NXDA wait states

Timing Diagram 4-24. Non-Multiplexed Mode, Direct Slave Burst Write

with BTERM# Disabled and Wait States (32-Bit Local Bus)

ADDR

CMD

D4 D5 D6

D4 D6 D7

LBE

D0 D1 D2 D3 D7 D8 D9 D10 D11

D0 D1 D2 D3

ADDR +4 +8 +C +10 +14 +18

D5 D8 D9 D10 D11

+1C +20 +24 +28 +2C

2 DATA-TO-ADDRESS WAIT STATES

LBE LBE LBE LBE

0ns 250ns 500ns 750ns

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

LCLK

LHOLD

LHOLDA

ADS#

ALE

BLAST#

LA[27:2]

LAD[31:0]

LRDYi#

RD#

WR#

LW/R#

LBE[3:0]#

Section 4

Timing Diagrams Direct Slave Operation

PCI 9052 Data Book, Version 2.0

4—PCI Target (Direct Slave)

Note: Local Bus: Little Endian, 32-bit

Burst enabled (Burst write of five Lwords), BTERM# enabled

Address-to-data = zero wait states

Data-to-data = zero wait states

Write strobe delay = zero wait states

Write cycle hold = zero wait states

Timing Diagram 4-25. Non-Multiplexed Mode, Direct Slave Burst Write with BTERM# Enabled (32-Bit Local Bus)

ADDR

CMD BE

D0 D1

ADDR +4 +8 +C +10

D0 D1

D2 D3 D4

D3 D4

LBE

0ns 100ns 200ns 300ns 400ns

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

LCLK

LHOLD

LHOLDA

ADS#

ALE

BLAST#

LA[27:2]

LAD[31:0]

LBE[3:0]#

LRDYi#

LW/R#

RD#

WR#

BTERM#

Section 4

Direct Slave Operation Timing Diagrams

PCI 9052 Data Book, Version 2.0

Note: Burst enabled (Burst write of four Lwords)

BTERM# enabled

Timing Diagram 4-26. Non-Multiplexed Mode, Direct Slave Burst Write with BTERM# Enabled (8-Bit Local Bus)

ADDR

CMD

BYTE ENABLE

ADDR

D1 D2 D3

C D E F C D E F C D E F C D E F

A+8 A+CA+4

0ns 250ns 500ns 750ns

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

PERR#

STOP#

LCLK

LHOLD

LHOLDA

ADS#

ALE

BLAST#

LA[27:2]

LAD[31:0]

LBE[3:0]#

LRDYi#

USER0/WAITO#

BTERM#

RD#

WR#

LW/R#

Section 4

Timing Diagrams Direct Slave Operation

PCI 9052 Data Book, Version 2.0

4—PCI Target (Direct Slave)

Note: Local burst

Address-to-data = zero wait states

Data-to-data = zero wait states

Read strobe delays = zero wait states

Timing Diagram 4-27. Non-Multiplexed Mode, Direct Slave Burst Read

with Prefetch of Four Lwords (32-Bit Local Bus)

ADDR

CMD

ADDR +4

LBE

+8 +C

D1 D2 D3

D0 D1 D2 D3

0ns 250ns 500ns

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

PERR#

STOP#

LCLK

LHOLD

LHOLDA

ADS#

ALE

BLAST#

LA[27:2]

LAD[31:0]

LBE[3:0]#

LRDYi#

USER0/WAITO#

BTERM#

RD#

WR#

LW/R#

Section 4

Direct Slave Operation Timing Diagrams

PCI 9052 Data Book, Version 2.0

Note: Burst read eight Lwords

Address-to-data = one NRAD wait state

Data-to-data = zero wait states

Read strobe delay = one wait state

Timing Diagram 4-28. Non-Multiplexed Mode, Direct Slave Burst Read

with Prefetch of Eight Lwords (16-Bit Local Bus)

CMD

ADDR

DP0 DP1 DP2 DP3 DP4 DP5 DP6

D0 D1 D2 D3 D4 D5 D6

READ STROBE DELAY

46464646

ADDRESS-TO-DATA WAIT STATE

D8 D9 D10 D11 D12 D13 D14 D15

646464 64

0ns 250ns 500ns 750ns

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

PERR#

STOP#

LCLK

LHOLD

LHOLDA

ADS#

ALE

BLAST#

LA[27:2]

LAD[31:0]

LBE[3:0]#

LRDYi#

LW/R#

WAITO#

RD#

WR#

Section 4

Timing Diagrams Direct Slave Operation

PCI 9052 Data Book, Version 2.0

4—PCI Target (Direct Slave)

Note: Burst read four Lwords

Address-to-data = one NRAD wait state

Data-to-data = one NRDD wait state

Read strobe delay = zero wait states

Timing Diagram 4-29. Non-Multiplexed Mode, Direct Slave Burst Read

with Prefetch of Four Lwords (8-Bit Local Bus)

ADDR

CMD

ADDR A+4 A+8 A+C

D0 D1 D2

C D E F C D E F C D E F C D E F

0ns 250ns 500ns 750ns 1000ns 1250ns

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

PERR#

STOP#

LCLK

LHOLD

LHOLDA

ADS#

BLAST#

LA[27:2]

LAD[31:0]

LBE[3:0]#

LRDYi#

WAITO#

BTERM#

RD#

WR#

LW/R#

Section 4

Direct Slave Operation Timing Diagrams

PCI 9052 Data Book, Version 2.0

Note: Direct Slave read for Space 0 (same for Spaces 1, 2, and 3 and Expansion ROM)

Prefetch eight Lwords, 32-bit Local Bus

Timing Diagram 4-30. Non-Multiplexed Mode, Direct Slave Read

with Direct Slave Read Ahead Mode Enabled (CNTRL[16]=1)

ADDR

CMD

ADDR

D1 D2 D3

CMD

A+4 D1 D2 D3 D4

+10 +14 +1C

D4 D5 D6 D7

LBE

+4 +C +18

READS PREFETCHED DATA IN FIFO

0ns 250ns 500ns 750ns

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

PERR#

STOP#

LCLK

LHOLD

LHOLDA

ADS#

ALE

BLAST#

LA[27:2]

LAD[31:0]

LRDYi#

RD#

LW/R#

USER0/WAITO#

BTERM#

LBE[3:0]#

Section 4

Timing Diagrams Direct Slave Operation

PCI 9052 Data Book, Version 2.0

4—PCI Target (Direct Slave)

Timing Diagram 4-31. Non-Multiplexed Mode, Direct Slave Burst Write

with PCI Write Release Bus Mode Enabled (CNTRL[18]=1)

CMD

DISCONNECT

RELEASE BUS MODE

D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 10 11 12 13 14 15

+4 +8 +C +10 14 18 1C 20 24 28 2C 30 34 38 3C

D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 10 11 12 13 1514

LBE

DELAYED LOCAL BUS

0ns 250ns 500ns 750ns 1000ns 1250ns

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

PERR#

STOP#

LCLK

LHOLD

LHOLDA

ADS#

ALE

BLAST#

LA[27:2]

LAD[31:0]

LBE[3:0]#

LRDYi#

LW/R#

RD#

WR#

Section 4

Direct Slave Operation Timing Diagrams

PCI 9052 Data Book, Version 2.0

Note: Disconnect immediately for a read

Does not affect pending reads when Write cycle occurs

Does not flush the Read FIFO if PCI Read cycle completes

Force Retry on write if read is pending

De-assert TRDY# until space is available in the Direct Slave Write FIFO

Timing Diagram 4-32. Non-Multiplexed Mode, Direct Slave Burst Read with PCI Write Release Bus Mode

Disabled (PCI Write Hold Bus Mode Enabled), PCI Read No Write Mode and PCI Read No Flush Mode

(Direct Slave Read Ahead Mode) Enabled, PCI Read with Write Flush Mode Disabled, and

PCI r2.1 Features Enabled (CNTRL[18:14]=01101)

CMD

ADDR

ADDR ADDR

LBE

RETRY

ADDR

CMDCMD

WRITE IS NOT ALLOWED DURING

DELAYED READ

RETRY

DELAYED READ ENTRIES

D0 D1 D2 D3 D4 D5 D6 D7 D8

READS DATA

+4 +8 +C +10 +14 +18 +1C

D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 D15

+20 +24 +28 +2C +30 +34 +38 +3C

ADDR

CMD

WRITE RETRIES AND

COMPLETES

0ns 250ns 500ns 750ns

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

PERR#

STOP#

LCLK

LHOLD

LHOLDA

ADS#

ALE

BLAST#

LA[27:2]

LAD[31:0]

LBE[3:0]#

LRDYi#

WR#

RD#

LW/R#

Section 4

Timing Diagrams Direct Slave Operation

PCI 9052 Data Book, Version 2.0

4—PCI Target (Direct Slave)

4.4.3 Big Endian Mode and Multiplexed Mode Local Bus

Timing Diagram 4-33. Multiplexed Mode, Direct Slave Single Write, Local Bus Big Endian (32-Bit)

ADDR

CMD BE

12345678

ADDR

78563412

LBE

0ns 100ns 200ns 300ns

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

PERR#

STOP#

LCLK

LHOLD

LHOLDA

ADS#

BLAST#

LAD[31:0]

LBE[3:0]#

LRDYi#

USER0/WAITO#

RD#

WR#

LW/R#

Section 4

Direct Slave Operation Timing Diagrams

PCI 9052 Data Book, Version 2.0

Note: Space 0 is mapped to I/O

Address-to-data = zero wait states

Data-to-data = zero wait states

Read strobe delay = zero wait states

Timing Diagram 4-34. Multiplexed Mode, Direct Slave Single Read, Local Bus Big Endian (32-Bit)

ADDR

CMD BE

ADDR

78563412

LBE

12345678

0ns 100ns 200ns 300ns 400ns

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

PERR#

STOP#

LCLK

LHOLD

LHOLDA

ADS#

BLAST#

LAD[31:0]

LBE[3:0]#

LRDYi#

USER0/WAITO#

RD#

WR#

LW/R#

Section 4

Timing Diagrams Direct Slave Operation

PCI 9052 Data Book, Version 2.0

4—PCI Target (Direct Slave)

Note: Local Bus: Big Endian, 32 bit

Burst enabled (burst write of five Lwords), BTERM# enabled

Address-to-data = zero wait states (NWAD)

Write strobe delay = zero wait states

Write cycle hold = zero wait states

Timing Diagram 4-35. Multiplexed Mode, Direct Slave Burst Write, Local Bus Big Endian (32-Bit)

ADDR

CMD BE

ADDR D0 D1 D2 D3

D0 D1 D2 D3 D4

LBE

D0 D1 D2 D3 D4

PCI Bus 12345678 AABBCCDD 87654321 EEFFGGHH 12345678

Local Bus 78563412 DDCCBBAA 21436587 HHGGFFEE 78563412

0ns 100ns 200ns 300ns 400ns

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

LCLK

LHOLD

LHOLDA

ADS#

ALE

BLAST#

LAD[31:0]

LBE[3:0]#

LRDYi#

LW/R#

RD#

WR#

BTERM#

Section 4

Direct Slave Operation Timing Diagrams

PCI 9052 Data Book, Version 2.0

Note: Local Bus: Big Endian, 16 bit

Burst enabled (burst write of four Lwords), BTERM# enabled

Address-to-data = zero wait states

Write strobe delay = zero wait states

Write cycle hold = zero wait states

Timing Diagram 4-36. Multiplexed Mode, Direct Slave Burst Write, Local Bus Big Endian (16-Bit)

ADDR

CMD

ADDR DL0 DL1 DL2 DL3

D0 D1

PCI Bus 12345678 AABBCCDD

DL0 DL1 DL2 DL3

Local Bus 78XXXX56 34XXXX12 DDXXXXCC BBXXXXAA

6 4 6

0ns 100ns 200ns 300ns 400ns

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

LCLK

LHOLD

LHOLDA

ADS#

ALE

BLAST#

LAD[31:0]

LBE[3:0]#

LRDYi#

LW/R#

RD#

WR#

BTERM#

Section 4

Timing Diagrams Direct Slave Operation

PCI 9052 Data Book, Version 2.0

4—PCI Target (Direct Slave)

Note: Prefetch four Lwords, Local burst

Address-to-data = zero wait states (NRAD)

Data-to-data = zero wait states (NRDD)

Read strobe delay = zero wait states

Timing Diagram 4-37. Multiplexed Mode, Direct Slave Burst Read, Local Bus Big Endian (32-Bit)

ADDR

CMD

ADDR D0

LBE

D0 D1 D2 D3

D2 D3

D0 D1 D2 D3

PCI Bus 12345678 AABBCCDD 87654321 EEFFGGHH

Local Bus 78563412 DDCCBBAA 21436587 HHGGFFEE

0ns 250ns 500ns

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

PERR#

STOP#

LCLK

LHOLD

LHOLDA

ADS#

ALE

BLAST#

LAD[31:0]

LBE[3:0]#

LRDYi#

USER0/WAITO#

BTERM#

RD#

WR#

LW/R#

Section 4

Direct Slave Operation Timing Diagrams

PCI 9052 Data Book, Version 2.0

Note: Burst enabled (Burst read of four words)

Address-to-data = one NRAD wait state

Data-to-data = zero wait states

Read strobe delay = three wait states

Timing Diagram 4-38. Multiplexed Mode, Direct Slave Burst Read, Local Bus Big Endian (16-Bit)

CMD

ADDR

ADDR ADDR

LBE

RETRY

ADDR

CMDCMD

WRITE IS NOT ALLOWED DURING

DELAYED READ

RETRY

DELAYED READ ENTRIES

D0 D1 D2 D3 D4 D5 D6 D7 D8

READS DATA

+4 +8 +C +10 +14 +18 +1C

D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 D15

+20 +24 +28 +2C +30 +34 +38 +3C

ADDR

CMD

WRITE RETRIES AND

COMPLETES

0ns 250ns 500ns 750ns

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

PERR#

STOP#

LCLK

LHOLD

LHOLDA

ADS#

ALE

BLAST#

LA[27:2]

LAD[31:0]

LBE[3:0]#

LRDYi#

WR#

RD#

LW/R#

PCI 9052 Data Book, Version 2.0

5—ISA Interface Mode

5 ISA INTERFACE MODE

5.1 ARCHITECTURE

A major architectural feature of the PCI 9052 is the

inclusion of a glueless ISA logic interface, which

provides for a smooth ISA-to-PCI conversion. It

supports 8- and 16-bit wide ISA slave devices, which

can be Memory- or I/O-mapped. Direct Slave Read

Ahead mode can be used to improve memory-mapped

Read data throughput. The PCI 9052 performs only

single cycles to ISA Interface Memory and I/O. The

PCI 9052 ISA Interface does not support ISA Bus

Master transfers nor ISA DMA.

The PCI 9052 ISA Interface is designed for ISA

compatibility, using an approximately 8 MHz external

clock input to the LCLK pin. ISA Interface mode

requires that the PCI 9052 be configured for Non-

Multiplexed mode (MODE pin low), and a programmed

serial EEPROM be present with the ISA Interface

Mode Enable bit set (INTCSR[12]=1). This bit is

writable only by serial EEPROM.

In ISA Interface mode, Local Address Space 0

is assigned for Memory command access to the

ISA interface, and Local Address Space 1 is assigned

for I/O command access to the ISA interface. At boot

time, the PCI BIOS writes the PCI base address it

assigned for Local Address Space 0 (if enabled) into

PCI Base Address register 2 (PCIBAR2), and the PCI

base address it assigned for Local Address Space 1

(if enabled) into PCI Base Address register 3

(PCIBAR3). System I/O addressing typically uses 16

address lines ([15:0]) for addressing up to 64 KB;

therefore, the PCIBAR3 value is generally a 16-bit

rather than a 32-bit address.

A Memory access to an offset from the PCI base

address that BIOS assigned in PCIBAR2 generates an

ISA interface Memory access to the Local Address

having the same offset referenced from the Local

Base Address programmed in LAS0BA. An I/O access

to an offset from the PCI Base Address that BIOS

assigned in PCIBAR3 generates an ISA interface I/O

access to the Local Address having the same offset

referenced from the Local Base Address programmed

in LAS1BA.

In ISA Interface mode, Local Addresses Spaces 2 and

3 and Expansion ROM can be used for additional

8-, 16-, and 32-bit Memory and/or I/O spaces, which

can be accessed with Local Bus control and the

Non-Multiplexed Address and Data Buses (LA[27:2]

and LAD[31:0], respectively). Refer to Figure 11-2,

“PCI 9052 Adapter Block Diagram,” on page 11-2 and

Figure 11-4, “Pin Assignments, ISA and

Non-Multiplexed/ISA Interface Modes,” on page 11-5

for Non-Multiplexed/ISA signals used for Local

Address Spaces 2 and 3 and Expansion ROM.

5.2 PIN DEFINITIONS

In ISA Interface mode, the functionality of seven Local

Bus pins changes. (Refer to Table 5-1 for pin

definitions.)

In ISA Interface mode, four Local Bus pins have dual

functionality. (Refer to Table 5-2 for pins with dual

functionality.)

Table 5-1. ISA and Non-ISA Interface Mode

Pin Definitions

Non-ISA

Interface Mode ISA Interface Mode

45 NC CHRDY

67 NC NOWS#

130 CS0# MEMRD#

131 CS1# MEMWR#

132 LRESET# LRESET

138 USER0/WAITO# IORD#

139 USER1/LLOCKo# IOWR#

Table 5-2. Pin Functionality in ISA Interface Mode

Local Address

Spaces 0 and 1

Local Address

Spaces 2 and 3

and Expansion ROM

46 SBHE# LBE3#

48 ISAA1 LBE1#

49 ISAA0 LBE0#

64 BALE ALE

Section 5

ISA Interface Mode Pin Definitions

PCI 9052 Data Book, Version 2.0

5.2.1 LRESET#/LRESET

In ISA Interface mode, the LRESET# pin polarity is

switched from active-low to active-high to redefine the

signal as LRESET. At boot time, LRESET is

de-asserted during PCI reset, asserts a pulse width of

approximately 750 µs, and de-asserts shortly before

serial EEPROM initialization completes and PCI BIOS

configuration is allowed (time assumes a 33.3 MHz

PCI clock effecting a 960 ns serial EEPROM clock

period, and INTCSR register loading to enable ISA

Interface mode occurs after 780 serial EEPROM

clocks).

Software reset (CNTRL[30]=1) asserts LRESET until

cleared by software.

5.2.2 CS0#/MEMRD# and

CS1#/MEMWR#

The CS0# and CS1# Chip Select signals are not

available in ISA Interface mode, even if ISA Memory is

not configured, as these pins are redefined as

MEMRD# and MEMWR#, respectively. These pins are

driven high, until an ISA Memory access causes

assertion, and continue to be driven high when the

PCI 9052 does not own the Local Bus (LHOLD input

asserted by a Local Bus master).

For 16-bit transactions, MEMRD# and MEMWR#

assert on the rising clock edge when BALE de-asserts.

For 8-bit transactions, MEMRD# and MEMWR# assert

on the falling clock edge after BALE de-asserts.

Some 8-bit ISA memory cards use SMEMRD#

(System Memory Read) and SMEMWR# (System

Memory Write) signals instead of MEMRD# and

MEMWR#, respectively. These signals assert only if

the address is within the lowest 1 MB of address

space. For such cards, the PCI 9052 MEMRD# and

MEMWR# signals can be used for SMEMRD# and

SMEMWR# command strobes if the entire ISA

memory is mapped below 1 MB. If only part of the

memory is mapped below 1 MB, either of the

PCI 9052 Chip Selects CS[3:2]# can be programmed

for the lower 1 MB, and the signals ANDed with

MEMRD# or MEMWR#, to generate SMEMRD# and

SMEMWR#.

5.2.3 USER0/WAITO#/IORD# and

USER1/LLOCKo#/IOWR#

The USER0/WAITO# and USER1/LLOCKo# signals

are not available in ISA Interface mode, even if the ISA

I/O space is not configured, as these pins (138 and

139, respectively) are redefined as IORD# and

IOWR#, respectively. The associated register bits,

CNTRL[5:0], must be x10x10b to set configuration as

USER0 and USER1 outputs. The pins are initially

USER0 and USER1 inputs, which are floated until ISA

Interface mode is enabled by serial EEPROM

initialization, approximately 750 µs after PCI reset

de-assertion (assuming the PCI clock frequency is

33 MHz).

For 16-bit I/O and all 8-bit transactions, IORD# and

IOWR# assert on the falling clock edge after BALE

de-asserts.

5.2.4 ALE/BALE

In ISA Interface mode, the ALE signal remains

defined as ALE for Local Address Spaces 2 and 3

and Expansion ROM, and is renamed BALE for

Local Address Spaces 0 and 1 (ISA Interface Memory

and I/O). BALE asserts on the falling edge of LCLK,

and de-asserts on the next rising edge. BALE pulse

width is dependent upon LCLK frequency.

ALE asserts during the same clock as ADS# assertion.

BALE asserts in the following clock period; therefore,

the address and byte enables are valid for a minimum

of two clocks prior to BALE de-assertion. (Refer to

Figures 10-3 and 10-4 for ALE and BALE timing,

respectively.)

5.2.5 NC/CHRDY

In ISA Interface mode, pin 45 provides CHRDY input,

and should be pulled high (in legacy ISA systems, the

motherboard provides the pull-up resistor). An ISA

slave device de-asserts CHRDY to insert wait states.

A standard 16-bit transaction lasts for three clock

cycles, but can be extended by de-asserting CHRDY

within one clock cycle after MEMRD#, MEMWR#,

IORD#, or IOWR# assertion. A standard 8-bit

transaction lasts for six clock cycles, but can be

extended by de-asserting CHRDY within three clock

cycles after MEMRD#, MEMWR#, IORD#, or IOWR#

assertion.

Section 5

Configuring Local Registers for ISA Interface Mode ISA Interface Mode

PCI 9052 Data Book, Version 2.0

5—ISA Interface Mode

In non-ISA Interface mode, pin 45 is a No Connect

(NC); however, as a floating input, it should be

tied high.

5.2.6 NC/NOWS#

In ISA Interface mode, pin 67 provides NOWS# input,

which can be asserted by an ISA slave device to

reduce the number of wait states.

A standard 16-bit Memory transaction lasts for three

clock cycles, but can be shortened to two clock cycles

by asserting both CHRDY and NOWS# within about

one-half clock cycle after MEMRD# or MEMWR#

assertion (one-half clock period, less command strobe

output delay and NOWS# setup time). A standard

16-bit I/O transaction lasts for three clock cycles, but

can be shortened to two clock cycles by asserting both

CHRDY and NOWS# prior to IORD# or IOWR#

assertion at the falling edge of the clock. A standard

8-bit transaction lasts for six clock cycles, but can be

shortened to as few as two clock cycles by asserting

both CHRDY and NOWS# within two clock cycles after

MEMRD#, MEMWR#, IORD#, or IOWR# assertion

(number of clock cycles between command strobe

assertion and NOWS# assertion, less command

strobe output delay and NOWS# setup time).

The NOWS# signal is clocked into an internal register

on the falling edge of the clock. The internal state

machine then samples the registered version of

NOWS# on the next rising edge of the clock.

NOWS# input is ignored if CHRDY is de-asserted to

insert wait states. NOWS# is not used by 16-bit I/O

legacy ISA devices. This signal is held normally

de-asserted by an internal 80K-Ohm pull-up resistor.

In Non-ISA Interface mode, this pin is a No Connect

(NC) and can be left unterminated or tied high.

5.2.7 Other Local Bus Signals

Non-ISA mode Local bus signals ADS#, LW/R#, RD#,

WR# and BLAST# are active during ISA transactions.

Configuring the RD# and WR# strobes in LAS0BRD

and LAS1BRD (for ISA spaces) does not affect ISA

signaling.

The ISA state machine generates an internal ready

signal, ISARDY, for which timing is determined by

CHRDY, NOWS#, and the width of the ISA

transaction. ISARDY is a one-clock wide pulse, and is

only sampled if the internal wait state generator has

counted down to zero. If the internal wait state

generator has not reached zero when ISARDY pulses,

the pulse is missed and the Local Master state

machine locks up. The duration of the ISA cycle is

intended to be controlled only by IOCHRDY and

NOWS#, not by the internal wait state generator.

5.3 CONFIGURING LOCAL

REGISTERS FOR

ISA INTERFACE MODE

Address space sizes are fixed at boot time and

configured by programming the Local Address Space

Range registers in the serial EEPROM. The LAS0RR

space size. The LAS1RR register is used to program

the ISA Interface I/O space size. I/O space size is

restricted to 256 bytes maximum, per PCI r2.2.

The Local base address (address generated on the

Local Bus for the lowest address in the Space) must

be programmed in the LAS0BA and LAS1BA registers

for the ISA Interface Memory and I/O spaces,

respectively. Chip Select 0 and 1 Base Address

registers (CS0BASE and CS1BASE, respectively)

must be programmed to match Local Address Space 0

configuration for ISA Interface Memory and Local

Address Space 1 configuration for ISA Interface I/O,

respectively; otherwise, the ISA Interface is never

acknowledged.

In the Local Address Space Bus Region Descriptor

registers (LAS0BRD for ISA Interface Memory and

LAS1BRD for ISA Interface I/O), LRDYi# must be

enabled, burst disabled, and internal wait state fields

must be zero (0) for ISA Interface mode to properly

function. Bus width for the ISA Interface Memory- and

I/O-mapped spaces are independently configurable

as 8 or 16 bit. Prefetch can be enabled in LAS0BRD

for the ISA Interface Memory-Mapped Address space.

I/O-Mapped Address space is not prefetched.

Section 5

ISA Interface Mode Configuring Local Registers for ISA Interface Mode

PCI 9052 Data Book, Version 2.0

For unused spaces, program the serial EEPROM with

associated LASxRR, LASxBA and LASxBRD

registers, as well as the CSxBASE register for the

unused ISA Interface Memory or I/O space (where x is

the Local Address Space number or Chip Select

number, as appropriate).

Notes: For ISA Interface mode register settings, use the

following:

•INTCSR Register Settings—Table 5-3 and the INTCSR register

description (Register 8-43)

•CNTRL Register Settings—Table 5-4 and the CNTRL register

description (Register 8-44)

•LAS0RR and LAS1RR Register Settings—Table 5-5 and the

LASxRR register descriptions (Registers 8-24 and 8-25)

•LAS0BA and LAS1BA Register Settings—LASxBA register

descriptions (Registers 8-29 and 8-30)

•LAS0BRD and LAS1BRD Register Settings—Table 5-6 and

the LASxBRD register descriptions (Registers 8-34 and 8-35)

•CS0BASE and CS1BASE Register Settings—Section 6 and

the CSxBASE register descriptions (Registers 8-39 and 8-40)

Local Base Addresses must be a multiple of the

address space size (which is a power of 2) or 0h. This

restriction may require increasing the range, lowering

the base address, and adding a software offset to

generate the desired ISA Interface addresses. Each of

the Local Address Spaces should be configured to not

overlap, by programming the Local Address Space

Base Address registers (LASxBA) with unique base

addresses. It is possible for the Local Address Spaces

to share common addresses, as independent sets of

Read and Write control signals are provided

(MEMRD# and MEMWR# for ISA Interface Memory,

IORD# and IOWR# for ISA Interface I/O, and RD# and

WR# and/or LW/R# for Spaces 2 and 3 and Expansion

ROM in ISA Interface mode).

Also, if either of the available chip selects CS[3:2]# are

programmed to enable access to shared Local

addresses, each might enable multiple devices. For

example, if LW/R# is used for Space 2 read/write

access and MEMRD# is used for ISA Interface

Memory, and the Local Address Spaces overlap, a

read of Space 0 could cause a simultaneous write to

the shared Local Address in Space 2.

Note: Serial EEPROM value of “X” represents “don’t care.”

Table 5-3. INTCSR Register Settings

in ISA Interface Mode

Bit Description

Value after Serial

EEPROM Load

9:0 Refer to the INTCSR register

(Register 8-43). —

12 ISA_MODE feature enabled.

Must be set to 1. 1

Table 5-4. CNTRL Register Serial EEPROM Settings

Bit Value Description

5:0 x10x10b Enable USER[1:0] as outputs for

IORD# and IOWR#.

11:6 xxxxxxb USER2/CS#2 and USER3/CS3#

configuration.

13:12 00b Must be 0 for PC platform.

14 1Must be 1 for PCI r2.1 protocol.

15 xFlush pending read for write.

16 xRecommend 1 to enable

Memory Read Ahead.

17 xPCI Retries for Writes.

18 1Disconnect PCI when Write FIFO

is full.

22:19 3h to Fh

Used for reads only if

CNTRL[14]=0. Used for writes

only if CNTRL[18]=0.

31:23 000000000b Refer to CNTRL register

description (Register 8-44).

Table 5-5. LAS0RR and LAS1RR Register

Serial EEPROM Settings

Bit

Memory

LAS0RR

I/O

LAS1RR Comments

0 0 1 Memory- or I/O-mapping.

1 0 0 —

2 0 x I/O space size of 4 bytes, 1;

otherwise, 0.

3 x x

Memory, 1, unless not

prefetchable.

I/O, 1, only for space size of

4 or 8 bytes.

27:4 xxxxxxh FFFFFxh Range, I/O maximum

is 256 bytes.

31:28 xxxx xxxx Don’t Care.

Section 5

Design Considerations ISA Interface Mode

PCI 9052 Data Book, Version 2.0

5—ISA Interface Mode

5.4 DESIGN CONSIDERATIONS

5.4.1 Interrupts

Legacy ISA cards configure a particular IRQ for

interrupt routing, typically selected using jumpers. The

selected IRQ signal (if any) should be routed to one of

the LINTi[2:1] input pins.

Legacy ISA systems use a positive edge-triggered

interrupt controller input to latch the interrupt, and the

legacy ISA device is not required to hold an interrupt

request asserted until serviced (although it may). The

LINTi[2:1] pins are configured by default as active-low

level-triggered inputs, for which an interrupt clears

when the interrupt source is de-asserted. However, for

ISA compatibility, either or both of the LINT[2:1] inputs

can be configured as positive edge-triggered latched

inputs, for which an interrupt can be cleared only

by software.

Refer to Section 7 for additional interrupt information.

Refer to Section 9.2.1 for pull-up/pull-down resistor

recommendations for the LINT[2:1]# pins.

5.4.2 Address and Control Signals

In Legacy ISA cards, addressing is determined on the

card (typically by jumpers). A legacy ISA design also

contains address decode/comparator circuitry to

enable read/write access within a range of addresses.

When converting an ISA slave design to PCI, often the

ISA address generation and comparator circuitry can

be removed as the PCI 9052 performs the address

decoding. Also the legacy ISA address can be

replaced by a programmed base address, with a more

convenient value for software (such as 0).

Legacy ISA addresses, such as those for COM ports,

are not available in PCI I/O space because typically

the first 1 KB of I/O addresses are reserved for PC

compatibility, and the host bridge does not forward

accesses in this range to the PCI Bus. However, each

Local Address Space can be configured to generate a

specific Local Bus base address for a PCI access to

the address in a PCIBAR register for a Local Address

Space, by programming the address into the Local

Base Address register (each Local base address must

always be a multiple of the size of its Local Address

Space). Therefore, while legacy ISA hardware can be

easily converted to a PCI 9052 design, any legacy ISA

software for the design must be modified to obtain the

base address PCI BIOS assigns, rather than use a

fixed base address.

Table 5-6. LAS0BRD and LAS1BRD Register Serial EEPROM Settings

Bit Memory LAS0BRD I/O LAS1BRD Comments

0 0 0 Burst is disabled on the Local Bus.

1 1 1 Enable internal ready logic for ISA interface.

2 0 0 BTERM# feature is not used.

4:3 xx 00b

Memory, non-zero Prefetch Count if bit [5]=1

for Read Ahead if CNTRL[16]=1.

I/O, prefetch disabled with bits [5:3]=100b.

5 1 1 Prefetch enabled for Memory Read Ahead.

10:6 00000 00000 No NRAD Read Address-to-Data wait states.

12:11 00 00 No NRDD Read Data-to-Data wait states.

14:13 00 00 No NXDA Data-to-Address wait states.

19:15 00000 00000 No NWAD Write Address-to-Data wait states.

21:20 00b 00b No NWDD Write Data-to-Data wait states.

23:22 0xb 0xb Bus width, 00 for 8-bit or 01 for 16-bit.

25:24 xxb xxb Big/Little Endian and byte ordering.

27:26 xxb xxb RD# strobe delay is not used in ISA spaces.

29:28 xxb xxb WR# strobe delay is not used in ISA spaces.

31:30 xxb xxb Write Cycle Hold is not used in ISA spaces.

Section 5

ISA Interface Mode Design Considerations

PCI 9052 Data Book, Version 2.0

Often when converting an ISA slave design to PCI,

additional chip select logic can be removed and

replaced by PCI 9052 Chip Selects CS[3:2]#. With

much of the front-end ISA logic removed, the simplicity

of the core design may become apparent.

Consideration should be given toward converting the

design to a Non-ISA Interface mode Local Bus. Some

advantages of Non-ISA Interface mode over ISA

Interface mode are as follows:

•Bus width can be expanded to 32-bit

•CS[1:0]# chip select pins become available

•USER[1:0] general purpose I/O pins become

available

•RD# and WR# strobe timing can be programmed

•Internal wait state generator can be used

In converting a legacy ISA design to PCI, ISA IORD#

and IOWR# or MEMRD# and MEMWR# signals can

be replaced with the PCI 9052 RD# and WR# signals.

The ISA BALE address latch signal is the same as the

ALE signal; however, the ADS# address strobe is

recommended for address latching, because the pulse

width is longer than BALE (which retains a shorter

pulse width at 33 or 40 MHz than at 8 MHz). Legacy

ISA CHRDY signaling can be inverted to drive the

LRDYi# ready input signal, or ready logic can be

eliminated by using the internal wait state generator if

timing parameters are known and constant.

5.4.3 Ready Signaling Protocol

and Timing

Converting a legacy ISA slave design to PCI 9052 ISA

or Non-ISA Interface modes should include an

analysis of the legacy ISA, PCI 9052 ISA Interface,

and PCI 9052 Non-Multiplexed mode protocols and

timings for optimal design. The ensuing sections

summarize NOWS# and CHRDY signaling for legacy

ISA slave devices, and NOWS# and CHRDY sampling

by the PCI 9052 ISA Interface. For a description

of PCI 9052 non-ISA LRDYi# sampling, refer to

Section 2.2.4.1.

5.4.3.1 Legacy ISA

A standard ISA Bus cycle for 8-bit devices includes

four wait states. ISA protocol for sampling CHRDY and

NOWS# for 8-bit Memory and I/O devices is to not

sample during the first data time, and sample on the

falling clock edge during the second, third, and fourth

data times. If NOWS# and CHRDY were not

previously asserted together to end the cycle, sample

CHRDY—not NOWS# (because standard 8-bit

Memory and I/O cycles use four wait states and

therefore can no longer be shortened) at the rising

clock edge of the fifth and any additional data times.

A standard ISA bus cycle for 16-bit devices includes

one wait state. ISA protocol for sampling CHRDY# and

NOWS# for 16-bit Memory devices is to sample on the

falling edge during the first data time, and if NOWS#

and CHRDY were not previously asserted together to

end the cycle, sample CHRDY—not NOWS#

(because a standard 16-bit Memory cycle uses one

wait state and therefore can no longer be shortened)

at the rising clock edge of the second and any

additional data times.

ISA protocol for sampling CHRDY for 16-bit I/O

devices is to not sample during the first data time, and

to sample CHRDY at the rising clock edge of the

second and any additional data times. CHRDY is not

sampled during the first data time, and NOWS# is

ignored because only 16-bit Memory devices are

allowed zero wait state operation.

5.4.3.2 ISA Interface Mode

A standard 16-bit transaction lasts for three clock

cycles, but can be extended by de-asserting CHRDY

within one clock cycle after MEMRD#, MEMWR#,

IORD#, or IOWR# assertion. A standard 8-bit

transaction lasts for six clock cycles, but can be

extended by de-asserting CHRDY within three clock

cycles after MEMRD#, MEMWR#, IORD#, or IOWR#

assertion.

A standard 16-bit Memory transaction lasts for three

clock cycles, but can be shortened to two clock cycles

by asserting both CHRDY and NOWS# within about

one-half clock cycle after MEMRD# or MEMWR#

assertion (one-half clock period, less command strobe

output delay and NOWS# setup time). A standard

16-bit I/O transaction lasts for three clock cycles, but

Section 5

Design Considerations ISA Interface Mode

PCI 9052 Data Book, Version 2.0

5—ISA Interface Mode

can be shortened to two clock cycles by asserting both

CHRDY and NOWS# prior to IORD# or IOWR#

assertion at the falling edge of the clock. A standard

8-bit transaction lasts for six clock cycles, but can be

shortened to as few as two clock cycles by asserting

both CHRDY and NOWS# within two clock cycles after

MEMRD#, MEMWR#, IORD#, or IOWR# assertion.

The NOWS# signal is clocked into an internal register

on the falling edge of the clock. The internal state

machine then samples the registered version of

NOWS# on the next rising edge of the clock.

5.4.3.2.1 NOWS# Input Sampling

ISA protocol for reducing the number of wait states

(from the default of four wait states for 8-bit transfers

or one wait state for 16-bit transfers) during a Bus

cycle is as follows—sample NOWS# halfway through

the second data time as well as halfway through each

subsequent data time, except for 16-bit memory

accesses, in which case sampling begins halfway

through the first data time (for possible zero wait state

operation if both NOWS# and CHRDY are asserted).

ISA protocol for 16-bit I/O transfers is to ignore

NOWS#, and not compress such cycles.

The PCI 9052 samples its NOWS# input halfway

through the first data time and halfway through each

subsequent data time, for all accesses. This allows all

accesses to be truly “zero wait state,” even though ISA

protocol allows Zero Wait State transfers for 16-bit

Memory transactions only. Sampling of NOWS#

during the first data time may cause conflict with ISA

designs that expect the signal to be first sampled

during the second data time for all 8-bit accesses, or

which expect no sampling for 16-bit I/O accesses

(providing a minimum of one wait state in either case).

Usually there is no conflict, as ISA designs typically

generate NOWS# from the command strobe along

with the address, and PCI 9052 command strobe

assertion occurs after the first NOWS# sampling

(following BALE de-assertion) for 16-bit I/O and all

8-bit transactions.

If a conflict does exist, one solution is to assert

NOWS# after the command strobe (MEMRD#,

MEMWR#, IORD#, or IOWR#) is asserted,

guaranteeing a minimum of one wait state. Another

solution is to delay recognition of the NOWS# signal.

The circuit illustrated in Figure 5-1 may be

incorporated into designs to delay recognition of the

NOWS# signal. However, this circuit also adds a wait

state to “zero wait state” 16-bit Memory accesses, or

to other accesses where the NOWS# signal is

dynamically asserted.

Using this circuit, when BALE is inactive (low), the

signal to the PCI 9052 (the modified NOWS# signal) is

unimportant. Once BALE goes active, for its half cycle

duration, it presets the signal to the PCI 9052. The

flip-flop is clocked with the rising edge of the Bus

clock, so when NOWS# is asserted early, it is delayed

one clock and therefore not sensed by the PCI 9052

until the ISA card expects it to be sensed.

Designers should look at the components involved to

determine whether the system may benefit from early

detection of NOWS#, or if this or some other method

should be implemented to delay its detection.

Figure 5-1. Circuit for Delaying NOWS# Recognition

SET

CLR

BALE

ISA

NOWS#

to PCI 9052

NOWS#

BCLKO

Section 5

ISA Interface Mode Timing Diagrams

PCI 9052 Data Book, Version 2.0

5.5 TIMING DIAGRAMS

Timing Diagram 5-1. 8-Bit Memory Read/Write Standard ISA Cycle (6 LCLK Shown)

Timing Diagram 5-2. 8-Bit Memory Read/Write Extended ISA Cycle (7 LCLK Shown)

0ns 250ns 500ns 750ns 1000ns 1250ns

LCLK

BALE

LA[23:2]

ISAA[1:0],SBHE#

MEMRD#/MEMWR#

IORD#/IOWR#

NOWS#

CHRDY

LAD[15:0] (Read)

LAD[15:0] (Write)

0ns 250ns 500ns 750ns 1000ns 1250ns

LCLK

BALE

LA[23:2]

ISAA[1:0],SBHE#

MEMRD#/MEMWR#

IORD#/IOWR#

NOWS#

CHRDY

LAD[15:0] (Read)

LAD[15:0] (Write)

Section 5

Timing Diagrams ISA Interface Mode

PCI 9052 Data Book, Version 2.0

5—ISA Interface Mode

Timing Diagram 5-3. 8-Bit Memory Read/Write Compressed ISA Cycle (3 LCLK Shown)

0ns 250ns 500ns 750ns 1000ns 1250ns

LCLK

BALE

LA[23:2]

ISAA[1:0],SBHE#

MEMRD#/MEMWR#

IORD#/IOWR#

NOWS#

CHRDY

LAD[15:0] (Read)

LAD[15:0] (Write)

Section 5

ISA Interface Mode Timing Diagrams

PCI 9052 Data Book, Version 2.0

Timing Diagram 5-4. 8-Bit I/O Read/Write Standard ISA Cycle (6 LCLK Shown)

Timing Diagram 5-5. 8-Bit I/O Read/Write Extended ISA Cycle (7 LCLK Shown)

0ns 250ns 500ns 750ns 1000ns 1250ns

LCLK

BALE

LA[23:2]

ISAA[1:0],SBHE#

MEMRD#/MEMWR#

IORD#/IOWR#

NOWS#

CHRDY

LAD[15:0] (Read)

LAD[15:0] (Write)

0ns 250ns 500ns 750ns 1000ns 1250ns

LCLK

BALE

LA[23:2]

ISAA[1:0],SBHE#

MEMRD#/ MEMWR#

IORD#/IOWR#

NOWS#

CHRDY

LAD[15:0] (Read)

LAD[15:0] (Write)

Section 5

Timing Diagrams ISA Interface Mode

PCI 9052 Data Book, Version 2.0

5—ISA Interface Mode

Timing Diagram 5-6. 8-Bit I/O Read/Write Compressed ISA Cycle (3 LCLK Shown)

0ns 250ns 500ns 750ns 1000ns 1250ns

LCLK

BALE

LA[23:2]

ISAA[1:0],SBHE#

MEMRD#/MEMWR#

IORD#/IOWR#

NOWS#

CHRDY

LAD[15:0] (Read)

LAD[15:0] (Write)

Section 5

ISA Interface Mode Timing Diagrams

PCI 9052 Data Book, Version 2.0

Timing Diagram 5-7. 16-Bit Memory Read/Write Standard ISA Cycle (3 LCLK Shown)

Timing Diagram 5-8. 16-Bit Memory Read/Write Extended ISA Cycle (4 LCLK Shown)

0ns 250ns 500ns 750ns 1000ns 1250ns

LCLK

BALE

LA[23:2]

ISAA[1:0],SBHE#

MEMRD#/MEMWR#

IORD#/IOWR#

NOWS#

CHRDY

LAD[15:0] (Read)

LAD[15:0] (Write)

0ns 250ns 500ns 750ns 1000ns 1250ns

LCLK

BALE

LA[23:2]

ISAA[1:0],SBHE#

MEMRD#/MEMWR#

IORD#/IOWR#

NOWS#

CHRDY

LAD[15:0] (Read)

LAD[15:0] (Write)

Section 5

Timing Diagrams ISA Interface Mode

PCI 9052 Data Book, Version 2.0

5—ISA Interface Mode

Timing Diagram 5-9. 16-Bit Memory Read/Write Compressed ISA Cycle (2 LCLK Shown)

0ns 250ns 500ns 750ns 1000ns 1250ns

LCLK

BALE

LA[23:2]

ISAA[1:0],SBHE#

MEMRD#/MEMWR#

IORD#/IOWR#

NOWS#

CHRDY

LAD[15:0] (Read)

LAD[15:0] (Write)

Section 5

ISA Interface Mode Timing Diagrams

PCI 9052 Data Book, Version 2.0

Timing Diagram 5-10. 16-Bit I/O Read/Write Standard ISA Cycle (3 LCLK Shown)

Timing Diagram 5-11. 16-Bit I/O Read/Write Extended ISA Cycle (4 LCLK Shown)

0ns 250ns 500ns 750ns 1000ns 1250ns

LCLK

BALE

LA[23:2]

ISAA[1:0],SBHE#

MEMRD#/MEMWR#

IORD#/IOWR#

NOWS#

CHRDY

LAD[15:0] (Read)

LAD[15:0] (Write)

0ns 250ns 500ns 750ns 1000ns 1250ns

LCLK

BALE

LA[23:2]

ISAA[1:0],SBHE#

MEMRD#/MEMWR#

IORD#/IOWR#

NOWS#

CHRDY

LAD[15:0] (Read)

LAD[15:0] (Write)

PCI 9052 Data Book, Version 2.0

6—Local Chip Select

6 LOCAL CHIP SELECT

6.1 OVERVIEW

The PCI 9052 provides four chip select outputs to

selectively enable devices on its Local Bus. Each

active-low chip select is programmable and

independent of any local address space. Without this

feature, external address decoding logic is required to

implement chip selects.

6.2 CHIP SELECT BASE

ADDRESS REGISTERS

There are four Chip Select Base Address registers.

These registers control the four chip select pins on

the PCI 9052. [For example, Chip Select 0 Base

Address register (CS0BASE) controls CS0#, Chip

Select 1 Base Address register (CS1BASE) controls

CS1#, and so forth.]

Chip Select 0 and Chip Select 1 (CS0# and CS1#,

respectively) are available in non-ISA Interface mode

only (INTCSR[12]=0). In ISA Interface mode

(INTCSR[12]=1), CS0BASE must be programmed to

match valid LAS0RR and LAS0BA register

configuration for ISA Memory (Space 0),

and CS1BASE must be programmed to match

valid LAS1RR and LAS1BA register configuration for

ISA I/O (Space 1).

The Chip Select Base Address registers serve four

purposes:

1. To enable or disable chip select functions within

the PCI 9052. If enabled, the chip select signal

is active if the Local Bus Address falls within the

address specified by the range and base

address. If disabled, the chip select signal

is not active.

2. To set the range of the Local Bus Addresses

for which the chip select signal(s) is active.

3. To set the Local Base Address, at which the

range starts.

4. To configure ISA interface logic when in

ISA Interface mode, for access to Space 0

Memory and Space 1 I/O addresses.

The three rules used to program the Chip Select Base

Address registers are as follows:

1. Range must be a power of 2 (only the most

significant bit is 1).

2. Base address must be a multiple of the range

or 0.

3. Address range must be encompassed by one

or more Local Address Spaces. Otherwise, the

chip select decoder does not see addresses

which have not been claimed by the PCI 9052

on behalf of a Local Address Space, and a chip

select is not asserted.

Chip selects are not bound to any particular

Local Address Space unless programmed

accordingly in the CSxBASE, LASxRR, and

LASxBA registers (where x is the Chip Select

number or Local Address Space number,

as appropriate).

Each 28-bit Chip Select Base Address register is

programmed, as listed in the following table.

The Y bit (bit 0) enables or disables the chip select

signal. X bits are used to determine the range and

base address of where the CS# pin is asserted.

To program the base and range, the X bits are set

as follows:

•Device length or range is specified by the first bit

set above the Y bit. Determined by setting a bit

in the register, calculated by shifting the range

value (a power of 2) one bit to the right (range

divided by 2).

•Base Address is determined by the bit(s) set above

the range bit. The address is not shifted from its

original value. The base address uses all bits in the

of the bits in the register at or below (to the right of)

the range bit.

Table 6-1. Chip Select Base Address Register

Signal Programming

MSB=27 LSB=0

XXXX XXXX XXXX XXXX XXXX XXXX XXXY

Section 6

Local Chip Select Procedure for Using Chip Select Base Address Registers

PCI 9052 Data Book, Version 2.0

Figure 6-1. Chip Select Base Address and Range

6.3 PROCEDURE FOR USING

CHIP SELECT BASE

ADDRESS REGISTERS

The following describes the procedure for using the

Chip Select Base Address registers.

1. Determine the range in hex. The range must be

a power of 2 (only the highest order bit is set).

2. Set a bit in the Chip Select Base Address

value by shifting the range value one bit to the

right (range divided by 2). Only one bit may be

set to encode the range.

3. Determine the base address. The base address

must be a multiple of the range [the base

address cannot contain ones (1) at or below (to

the right of) the encoded range bit]. Set the base

address directly into the bits above the range bit.

The base address is not shifted from its original

value.

4. Set the Enable bit (bit 0) in the Chip Select Base

Address register to 1.

6.3.1 Chip Select Base Address

A 16 KB SRAM device is attached to the Local Bus

and a chip select is provided. The base address is

specified to be 24000h. The following figure illustrates

this example.

Figure 6-2. Memory Map Example

1. Determine the range in hex and divide the value

by 2 (for example, 16 KB is equivalent to 4000h,

leaving the range encoding at 2000h).

2. Determine the base address (for example,

24000h). Verify that the base address does not

overwrite the range bit or any lower bits.

3. Set the base address into the bits above the

range encoding. The base address is not shifted

from its original value.

4. Set the Enable bit (bit 0).

The following is a complete example of setting the

Chip Select Base Address register with a range of

4000h, a base address of 24000h, and enabled:

Base Address

FFFFFFFh

Range—Address

at which CS#

is asserted

{

MSB=27 LSB=0

0000 0000 0010 0110 0000 0000 0001

24000h

FFFFFFFh

27FFFh

Section 6

Local Chip Select Timing Diagram

PCI 9052 Data Book, Version 2.0

6.4 TIMING DIAGRAM

Note: CS[3:0]# Base Address is in the range of Spaces 3 through 0

Timing Diagram 6-1. Chip Select [3:0]#

CMD BE

ADDR D0 D1 D2 D3

ADDR +4 +8 +12

D0 D1 D2 D3

LBE

0ns 100ns 200ns 300ns 400ns

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

LCLK

LHOLD

LHOLDA

ADS#

BLAST#

LA[27:2]

LAD[31:0]

LRDYi#

CS[3:0]#

LBE[3:0]#

WR#

RD#

LW/R#

PCI 9052 Data Book, Version 2.0

7—Interrupts & User I/O

7 PCI/LOCAL INTERRUPTS AND USER I/O

7.1 OVERVIEW

The PCI 9052 provides two Local interrupt input

pins (LINTi[2:1]) and a bit in the Interrupt Control/

Status register (INTCSR[7]) that can optionally trigger

PCI interrupt INTA# output. The interrupt input pins

have an associated register bit to enable or disable the

pin (INTCSR[3, 0], respectively), and each has a

Status bit to indicate whether an interrupt source is

active (INTCSR[5, 2], respectively). The LINTi[2:1]

pins are programmable for active-low or active-high

polarity in the default Level-Sensitive mode. They can

be optionally configured as a positive edge-triggered

interrupt (such as for ISA compatibility).

Level-sensitive interrupts are cleared when the

interrupt source is no longer active, or the interrupt

input pin is disabled. Edge-triggered (latched)

interrupts remain active until cleared by a software

write, which either asserts the associated Interrupt

Clear bit(s) (INTCSR[11 and/or 10]), or disables the

interrupt input pin(s) (LINT[2:1]). INTA# output can

also be de-asserted by clearing the PCI Interrupt

Enable bit (INTCSR[6]=0).

7.2 INTERRUPTS

Figure 7-1. Interrupt and Error Sources

7.2.1 PCI Interrupts (INTA#)

A PCI 9052 PCI Interrupt (INTA#) can be asserted by

Local Interrupt Input 2 or 1 (LINTi[2:1]), which are

described in the next section. INTA# can also be

asserted by setting the Software Interrupt bit

(INTCSR[7]=1).

INTA# can be enabled or disabled (default

configuration) in the PCI Interrupt Enable bit

(INTCSR[6]). If a PCI interrupt is required, the PCI

Interrupt Pin register must be set to a value of 1h at

boot time by the serial EEPROM (PCIIPR[7:0]=1h), or

chip default value 1h if a blank or no serial EEPROM is

used, so that BIOS can route INTA# to an interrupt

controller interrupt request (IRQ) input. BIOS writes

the assigned IRQ number to the PCI Interrupt Line

system-architecture specific.

An INTA# assertion generated from either LINTi[2:1]

inputs, configured as level-sensitive interrupts, is

cleared when one of the following occurs:

•Interrupt source is no longer active

•Interrupt input pin(s) (LINTi[2:1]) is disabled

•PCI interrupts are disabled (INTCSR[6]=0)

Subsequent to disabling interrupts, if the Local

interrupt input remains asserted and interrupts are

re-enabled, another interrupt is generated.

An INTA# assertion generated from either LINTi[2:1]

inputs, configured as edge-triggered interrupts,

remains active regardless of the LINTi[2:1] input pin

state, until the interrupt is cleared with a software write

that performs one of the following:

•Asserts the associated Interrupt Clear bit(s)

(INTCSR[11 and/or 10])

•Disables the interrupt input pin(s) (LINTi[2:1])

•Disables PCI interrupts (INTCSR[6]=0)

Subsequent to disabling interrupts, if interrupts are

re-enabled, another interrupt is not generated (even if

the LINTi[2:1] input state remains high) until the next

low-to-high transition on the LINTi[2:1] input pin

occurs.

A software interrupt can be enabled by setting the

Software Interrupt bit (INTCSR[7]=1). INTA# is

asserted if the PCI Interrupt Enable bit is also set

(INTCSR[6]=1). INTA# output is subsequently

de-asserted when the Software Interrupt bit or PCI

Interrupt Enable bit is cleared (INTCSR[7 or 6]=0,

respectively).

OR INTA#

LINTi1

LINTi2

Software Interrupt

INTCSR[7]

Section 7

PCI/Local Interrupts and User I/O User I/O

PCI 9052 Data Book, Version 2.0

INTA# is a level output. If INTA# is asserted or

de-asserted in response to LINTi[2:1] input, INTA#

output timing is asynchronous to the PCI and Local

clocks. If INTA# is asserted or de-asserted by

software, INTA# output timing is referenced to a rising

edge of the PCI clock.

Note: Regarding PLXMon, if PCI interrupts are enabled and the

PCI 9052 generates an INTA#, the interrupt status displayed in

PLXMon does not show the bit in the INTCSR runtime register as

“active.” This occurs because the PCI 9052 driver responds to the

PCI interrupt and clears it. To test a PCI interrupt assertion and view

active status with PLXMon, disable the PCI Interrupt Enable bit

(INTCSR[6]=0), while keeping all other bit(s) required to generate

the interrupt active. Then the driver does not see an INTA#

assertion. After the screen is refreshed, following interrupt assertion,

the active status can be seen in PLXMon.

7.2.2 Local Interrupt Input (LINTi[2:1])

The PCI 9052 provides two local interrupt input pins,

LINTi[2:1]. The Local interrupts can be used to

generate a PCI interrupt, and/or software can poll the

Interrupt Status bit(s) (INTCSR[5 and/or 2]). LINTi[2:1]

are programmable for active-low or active-high polarity

(INTCSR[4, 1]) in the default Level-Sensitive mode

(INTCSR[9, 8]=00). Each pin can be optionally

configured as a positive edge-triggered interrupt

(INTCSR[8, 1, 0]=111b and INTCSR[9, 4, 3]=111b),

such as, for ISA compatibility. Level-sensitive

interrupts are cleared when the interrupt source is no

longer active, or the interrupt input pin is disabled.

Edge-triggered (latched) interrupts remain active until

cleared by a software write, which asserts the

associated Interrupt Clear bit(s) (INTCSR[11,

10]=11b), or disables the interrupt input pin

(INTCSR[3, 0]=0). If the PCI Interrupt Enable bit is set

(INTCSR[6]=1) and INTA# is asserted for a Local

interrupt input assertion, INTA# can be de-asserted by

clearing the PCI Interrupt Enable bit (INTCSR[6]=0).

PCI 9052 sampling of enabled LINTi[2:1] inputs, and

INTA# output state changes (if PCI interrupts are

enabled) in response to enabled LINT[2:1] input, are

asynchronous to the PCI and Local clocks.

7.2.3 All Modes PCI SERR# (PCINMI)

The PCI 9052 asserts an SERR# pulse if Parity Error

Response is enabled (PCICR[6]=1) and it detects an

address parity error.

The SERR# output can be enabled or disabled with

the SERR# Enable bit (PCICR[8]).

7.3 USER I/O

The PCI 9052 supports four user I/O pins, USER[3:0].

All are multiplexed with other functional pins—USER0/

WAITO#, USER1/LLOCKo#, USER2/CS2#, and

USER3/CS3#. Pin configuration is defined by bits in

the CNTRL register. The default functionality for each

of these pins is USERx. Default I/O configuration for

all USER[3:0] pins is input.

The PCI 9052 USER[3:0] I/O pins are active,

regardless of whether the PCI 9052 owns the Local

Bus.

It is recommended that unused USER I/O pins be

configured as outputs, rather than the default setting

as inputs; otherwise, input pins should be pulled to a

known state.

Section 7

Timing Diagrams PCI/Local Interrupts and User I/O

PCI 9052 Data Book, Version 2.0

7—Interrupts & User I/O

7.4 TIMING DIAGRAMS

Timing Diagram 7-1. Local Level-Triggered LINTi/LINTi2 Asserting PCI Output INTA#

CMD BYTE ENABLES

ADDR

LINTi1, LINTi2 ARE ACTIVE HIGH

RESPONSE ON THE PCI BUS

DATA

INTCSR[2]=1 INDICATES LINTi1 IS ACTIVE

LINTi1, LINTi2 ARE ACTIVE LOW

0ns 100ns 200ns 300ns 400ns

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

INTA#

LCLK

LINTi1, LINTi2

Section 7

PCI/Local Interrupts and User I/O Timing Diagrams

PCI 9052 Data Book, Version 2.0

Timing Diagram 7-2. Local Edge-Triggered Interrupt Asserting PCI Interrupt

CMD BE

ADDR

Response on the PCI Bus

DATA

Cleared by Configuration Register

0ns 100ns 200ns 300ns 400ns 500

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

INTA#

LCLK

LINTi[2:1]

is asynchronous to both PCI and Local Clocks

Section 7

Timing Diagrams PCI/Local Interrupts and User I/O

PCI 9052 Data Book, Version 2.0

7—Interrupts & User I/O

Timing Diagram 7-3. USER[3:0] as Inputs

CMD

A D D

CMD

BIT[2]=1 A

CMD

USER0 IS INPUT

USER[3:0] PINS ARE INPUTS

DATA DATA

BIT[2]=0

0ns 250ns 500ns 750ns 1000ns 1250ns

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

LCLK

LHOLD

LHOLDA

ADS#

BLAST#

LA[27:2]

LAD[31:0]

LRDYi#

USER[3:0]

Section 7

PCI/Local Interrupts and User I/O Timing Diagrams

PCI 9052 Data Book, Version 2.0

Timing Diagram 7-4. USER[3:0] as Outputs

CMD

A D D

CMD

BIT[5]=0 A

CMD

BIT[5]=1A

USER0 SET AS OUTPUT

USER[3:0] PINS ARE OUTPUTS

DATA DATA

0ns 250ns 500ns 750ns 1000ns 1250ns

CLK

FRAME#

AD[31:0]

C/BE[3:0]#

IRDY#

DEVSEL#

TRDY#

LCLK

LHOLD

LHOLDA

ADS#

BLAST#

LA[27:2]

LAD[31:0]

LRDYi#

USER[3:0]

PCI 9052 Data Book, Version 2.0

8—Registers

8 REGISTERS

8.1 REGISTER ADDRESS MAPPING

Table 8-1. PCI Configuration Registers

PCI

Configuration

Address

To ensure software compatibility with other versions of the PCI 9052 family

and to ensure compatibility with future enhancements,

write 0 to all unused bits. PCI

Writable

Serial

EEPROM

Writable

31 24 23 16 15 8 7 0

00h Device ID Vendor ID N Y

04h Status Command Y N

08h Class Code Revision ID N Y[31:8]

0Ch Built-In Self Test

(Not Supported) Header Type

PCI Bus

Latency Timer

(Not Supported)

Cache Line Size Y[7:0] N

10h PCI Base Address 0 for Memory Accesses to Local Configuration Registers Y N

14h PCI Base Address 1 for I/O Accesses to Local Configuration Registers Y N

18h PCI Base Address 2 for Accesses to Local Address Space 0 Y N

1Ch PCI Base Address 3 for Accesses to Local Address Space 1 Y N

20h PCI Base Address 4 for Accesses to Local Address Space 2 Y N

24h PCI Base Address 5 for Accesses to Local Address Space 3 Y N

28h PCI Cardbus Information Structure (CIS) Pointer (Not Supported) NN

2Ch Subsystem ID Subsystem Vendor ID N Y

30h PCI Expansion ROM Base Address Y N

34h Reserved NN

38h Reserved NN

3Ch Maximum Latency

(Not Supported)

Minimum Grant

(Not Supported) Interrupt Pin Interrupt Line Y[7:0] Y[15:8]

Section 8

Registers Register Address Mapping

PCI 9052 Data Book, Version 2.0

Table 8-2. Local Configuration Registers

PCI

(Offset

from Local

Base

Address)

To ensure software compatibility with other versions of the PCI 9052 family

and to ensure compatibility with future enhancements,

write 0 to all unused bits.

31 0

PCI

Writable

Serial

EEPROM

Writable

00h Local Address Space 0 Range Y Y

04h Local Address Space 1 Range Y Y

08h Local Address Space 2 Range Y Y

0Ch Local Address Space 3 Range Y Y

10h Expansion ROM Range Y Y

14h Local Address Space 0 Local Base Address (Remap) Y Y

18h Local Address Space 1 Local Base Address (Remap) Y Y

1Ch Local Address Space 2 Local Base Address (Remap) Y Y

20h Local Address Space 3 Local Base Address (Remap) Y Y

24h Expansion ROM Local Base Address (Remap) Y Y

28h Local Address Space 0 Bus Region Descriptors Y Y

2Ch Local Address Space 1 Bus Region Descriptors Y Y

30h Local Address Space 2 Bus Region Descriptors Y Y

34h Local Address Space 3 Bus Region Descriptors Y Y

38h Expansion ROM Bus Region Descriptors Y Y

3Ch Chip Select 0 Base Address Y Y

40h Chip Select 1 Base Address Y Y

44h Chip Select 2 Base Address Y Y

48h Chip Select 3 Base Address Y Y

4Ch Interrupt Control/Status Y Y

50h User I/O, Direct Slave Response, Serial EEPROM, and Initialization Control Y Y

Section 8

PCI Configuration Registers Registers

PCI 9052 Data Book, Version 2.0

8—Registers

8.2 PCI CONFIGURATION REGISTERS

All registers may be written to or read from using Byte, Word, or Lword accesses.

Bit Description Read Write Value after

Reset

15:0 Vendor ID. Identifies manufacturer of device. Defaults to the PCI SIG-issued

Vendor ID of PLX, if blank or no serial EEPROM is present. Yes Serial

EEPROM 10B5h

31:16 Device ID. Identifies particular device. Defaults to PLX part number for

PCI interface chip if blank or no serial EEPROM is present. Yes Serial

EEPROM 9050h

Bit Description Read Write Value after

Reset

0I/O Space. Value of 1 allows the device to respond to I/O space accesses.

Value of 0 disables the device from responding to I/O space accesses. Yes Yes 0

Memory Space. Value of 1 allows the device to respond to Memory Space

accesses. A value of 0 disables the device from responding to Memory Space

accesses.

Yes Yes 0

2Master Enable. Not Supported. Yes No 0

3Special Cycle. Not Supported. Yes No 0

4Memory Write/Invalidate. Not Supported. Yes No 0

5VGA Palette Snoop. Not Supported. Yes No 0

Parity Error Response. Value of 0 indicates a parity error is ignored and

operation continues. Value of 1 indicates parity error response is enabled

[PERR# and SERR#, if SERR# is enabled (PCICR[8]=1)]. Parity error is always

signaled in PCISR[15].

Yes Yes 0

Wait Cycle Control. Controls whether the device does address/data stepping.

Value of 0 indicates the device never does stepping. Value of 1 indicates the

device always does stepping.

Note: Hardwired to 0.

Yes No 0

8SERR# Enable. Value of 1 enables the SERR# driver. Value of 0 disables the

SERR# driver. Yes Yes 0

Fast Back-to-Back Enable. Indicates what type of fast back-to-back

transfers a Master can perform on a bus. Value of 1 indicates fast

back-to-back transfers can occur to any agent on the bus. Value of 0

indicates fast back-to-back transfers can occur only to the same agent

as the previous cycle.

Yes No 0

15:10 Reserved.Yes No 0h

Section 8

Registers PCI Configuration Registers

PCI 9052 Data Book, Version 2.0

Note: Software can distinguish the PCI 9052 from the PCI 9050

using this register value, which is 1h in the PCI 9050.

Bit Description Read Write Value after

Reset

6:0 Reserved. Yes No 0h

Fast Back-to-Back Capable. Value of 1 indicates the adapter can accept fast

back-to-back transactions. Value of 0 indicates the adapter cannot accept fast

back-to-back transactions.

Yes No 1

8Master Data Parity Error Detected. Not Supported. Yes No 0

10:9 DEVSEL Timing. Indicates timing for DEVSEL# assertion. Value of 01

is medium. Yes No 01

11 Signaled Target Abort. Value of 1 indicates the PCI 9052 signaled

a Target Abort. Value of 1 clears the bit (0). Yes Yes/Clr 0

12 Received Target Abort. Value of 1 indicates the PCI 9052 received

a Target Abort signal. Not Supported. Yes No 0

13 Received Master Abort. Value of 1 indicates the PCI 9052 received a Master

Abort signal. Not Supported. Yes No 0

14 Signaled System Error. Value of 1 indicates the PCI 9052 reported a system

error on the SERR# signal. Value of 1 clears the Error Status bit (0). Yes Yes/Clr 0

Detected Parity Error. Value of 1 indicates the PCI 9052 detected a PCI Bus

parity error, even if parity error handling is disabled [the Parity Error Response

bit in the Command register is clear (PCICR[6]=0)].

One of two conditions can cause this bit to be set when the PCI 9052 detects

a parity error:

1) During a PCI Address phase;

2) When it was the Target of a write.

Writing 1 clears this bit to 0.

Yes Yes/Clr 0

Bit Description Read Write Value after

Reset

7:0 Revision ID. PCI 9052 Silicon revision. Yes No 2h

Bit Description Read Write Value after

Reset

7:0 Specific Register Level Programming Interface. None defined. Yes Serial

EEPROM 00h

15:8 Subclass Encoding (80h). (Other Bridge Device).Yes Serial

EEPROM 80h

23:16 Base Class Encoding. (Bridge Device). Yes Serial

EEPROM 06h

Section 8

PCI Configuration Registers Registers

PCI 9052 Data Book, Version 2.0

8—Registers

Bit Description Read Write Value after

Reset

7:0 System Cache Line Size. Specified in units of 32-bit Lwords. Can be written

and read; however, the value does not affect PCI 9052 operation. Yes Yes 0h

Bit Description Read Write Value after

Reset

7:0 PCI Bus Latency Timer. Not Supported.Yes No 0h

Bit Description Read Write Value after

Reset

6:0

Configuration Layout Type. Specifies layout of registers 10h through 3Fh in

configuration space. Header Type 0 is defined for all PCI devices other than

PCI-to-PCI bridges (Header Type 1) and Cardbus bridges (Header Type 2).

Yes No 0h

Multi-Function Device. Value of 1 indicates multiple (up to eight) functions

(logical devices) each containing its own, individually addressable configuration

space, 64 Lwords in size.

Note: Hardwired to 0 (that is, device is single function,

as multi-function = false).

Yes No 0

Bit Description Read Write Value after

Reset

7:0 Built-In Self Test. Value of 0 indicates device passed its test. Not Supported.Yes No 0

Section 8

Registers PCI Configuration Registers

PCI 9052 Data Book, Version 2.0

Note: PCIBAR0 can be enabled or disabled by using CNTRL[13:12].

Note: PCIBAR1 can be enabled or disabled by using CNTRL[13:12].

Bit Description Read Write Value after

Reset

Memory Space Indicator. Value of 0 indicates the register maps into

Memory space. Value of 1 indicates the register maps into I/O space.

Note: Hardwired to 0.

Yes No 0

2:1

00 = Locate anywhere in 32-bit Memory Address space

01 = PCI r2.1, Locate below 1-MB Memory Address space

PCI r2.2, Reserved

10 = Locate anywhere in 64-bit Memory Address space

11 = Reserved

Note: Hardwired to 0.

Yes No 00

3Prefetchable. Value of 1 indicates there are no side effects on reads.

Note: Hardwired to 0. Yes No 0

6:4

Memory Base Address. Memory base address for access to Local

Configuration registers (uses 128 bytes).

Note: Hardwired to 0.

Yes No 000

31:7 Memory Base Address. Memory base address for access to Local

Configuration registers. Yes Yes 0h

Bit Description Read Write Value after

Reset

Memory Space Indicator. Value of 0 indicates the register maps into

Memory space. Value of 1 indicates the register maps into I/O space.

Note: Hardwired to 1.

Yes No 1

1Reserved. Yes No 0

6:2

I/O Base Address. Base Address for I/O access to Local Configuration

registers (uses 128 bytes).

Note: Hardwired to 0.

Yes No 0h

31:7 I/O Base Address. Base Address for I/O access to Local Configuration

registers. Yes Yes 0h

Section 8

PCI Configuration Registers Registers

PCI 9052 Data Book, Version 2.0

8—Registers

Note: If allocated, Local Address Space 0 can be enabled

or disabled by setting or clearing LAS0BA[0].

Note: If allocated, Local Address Space 1 can be enabled

or disabled by setting or clearing LAS1BA[0].

Bit Description Read Write Value after

Reset

Memory Space Indicator. Value of 0 indicates the register maps into

Memory space. Value of 1 indicates the register maps into I/O space.

(Specified in the LAS0RR register.)

Yes No 0

2:1

00 = Locate anywhere in 32-bit Memory Address space

01 = PCI r2.1, Locate below 1-MB Memory Address space

PCI r2.2, Reserved

10 = Locate anywhere in 64-bit Memory Address space

11 = Reserved

(Specified in the LAS0RR register.)

If I/O Space, bit 1 is always 0 and bit 2 is included in the base address.

Yes

Mem: No

I/O:

Bit 1 No,

Bit 2 Yes

Prefetchable (If Memory Space). Value of 1 indicates there are no side

effects on reads. Reflects value of LAS0RR[3] and provides only status to the

system. Does not affect PCI 9052 operation. The associated Bus Region

Descriptor register (LAS0BRD) controls prefetching functions of this address

space.

If I/O Space, bit 3 is included in the base address.

Yes Mem: No

I/O: Yes 0

31:4 Base Address. Base address for access to Local Address Space 0. Yes Yes 0h

Bit Description Read Write Value after

Reset

Memory Space Indicator. Value of 0 indicates the register maps into

Memory space. Value of 1 indicates the register maps into I/O space.

(Specified in the LAS1RR register.)

Yes No 0

2:1

00 = Locate anywhere in 32-bit Memory Address space

01 = PCI r2.1, Locate below 1-MB Memory Address space

PCI r2.2, Reserved

10 = Locate anywhere in 64-bit Memory Address space

11 = Reserved

(Specified in the LAS1RR register.)

If I/O Space, bit 1 is always 0 and bit 2 is included in the base address.

Yes

Mem: No

I/O:

Bit 1 No,

Bit 2 Yes

Prefetchable (If Memory Space). Value of 1 indicates there are no side

effects on reads. Reflects value of LAS1RR[3] and provides only status to the

system. Does not affect PCI 9052 operation. The associated Bus Region

Descriptor register (LAS1BRD) controls prefetching functions of this address

space.

If I/O Space, bit 3 is included in base address.

Yes Mem: No

I/O: Yes 0

31:4 Base Address. Base address for access to Local Address Space 1. Yes Yes 0h

Section 8

Registers PCI Configuration Registers

PCI 9052 Data Book, Version 2.0

Note: If allocated, Local Address Space 2 can be enabled

or disabled by setting or clearing LAS2BA[0].

Note: If allocated, Local Address Space 3 can be enabled

or disabled by setting or clearing LAS3BA[0].

Bit Description Read Write Value after

Reset

Memory Space Indicator. Value of 0 indicates the register maps into

Memory space. Value of 1 indicates the register maps into I/O space.

(Specified in the LAS2RR register.)

Yes No 0

2:1

00 = Locate anywhere in 32-bit Memory Address space

01 = PCI r2.1, Locate below 1-MB Memory Address space

PCI r2.2, Reserved

10 = Locate anywhere in 64-bit Memory Address space

11 = Reserved

(Specified in the LAS2RR register.)

If I/O Space, bit 1 is always 0 and bit 2 is included in the base address.

Yes

Mem: No

I/O:

Bit 1 No,

Bit 2 Yes

Prefetchable (If Memory Space). Value of 1 indicates there are no side

effects on reads. Reflects value of LAS2RR[3] and provides only status to the

system. Does not affect PCI 9052 operation. The associated Bus Region

Descriptor register (LAS2BRD) controls prefetching functions of this address

space.

If I/O Space, bit 3 is included in base address.

Yes Mem: No

I/O: Yes 0

31:4 Base Address. Base address for access to Local Address Space 2. Yes Yes 0h

Bit Description Read Write Value after

Reset

Memory Space Indicator. Value of 0 indicates the register maps into

Memory space. Value of 1 indicates the register maps into I/O space.

(Specified in the LAS3RR register.)

Yes No 0

2:1

00 = Locate anywhere in 32-bit Memory Address space

01 = PCI r2.1, Locate below 1-MB Memory Address space

PCI r2.2, Reserved

10 = Locate anywhere in 64-bit Memory Address space

11 = Reserved

(Specified in the LAS3RR register.)

If I/O Space, bit 1 is always 0 and bit 2 is included in the base address.

Yes

Mem: No

I/O:

Bit 1 No,

Bit 2 Yes

Prefetchable (If Memory Space). Value of 1 indicates there are no side effects

on reads. Reflects value of LAS3RR[3] and provides only status to the system.

Does not affect PCI 9052 operation. The associated Bus Region Descriptor

If I/O Space, bit 3 is included in base address.

Yes Mem: No

I/O: Yes 0

31:4 Base Address. Base address for access to Local Address Space 3. Yes Yes 0h

Section 8

PCI Configuration Registers Registers

PCI 9052 Data Book, Version 2.0

8—Registers

Bit Description Read Write Value after

Reset

31:0 Cardbus Information Structure (CIS) Pointer for PC Cards. Not Supported.Yes No 0h

Bit Description Read Write Value after

Reset

15:0

Subsystem Vendor ID. Unique Add-in Board Vendor ID.

Note: PCISVID is a read-only register. However, a Configuration write to offset

2Ch overwrites the value in the PCI Interrupt Line register (PCIILR), possibly

disabling PCI interrupt capability. (Refer to PCI 9052 Errata #3.)

Yes Serial

EEPROM 0h

Bit Description Read Write Value after

Reset

15:0

Subsystem ID. Unique Add-in Board Device ID.

Note: PCISID is a read-only register. However, a Configuration write to offset

2Ch overwrites the value in the PCI Interrupt Line register (PCIILR), possibly

disabling PCI interrupt capability. (Refer to PCI 9052 Errata #3.)

Yes Serial

EEPROM 0h

Bit Description Read Write Value after

Reset

Address Decode Enable. Value of 1 indicates a device accepts accesses

to the Expansion ROM address. Value of 0 indicates a device does not accept

accesses to Expansion ROM.

Yes Yes 0

10:1 Reserved.Yes No 0h

31:11 Expansion ROM Base Address (upper 21 bits). Yes Yes 0h

Section 8

Registers PCI Configuration Registers

PCI 9052 Data Book, Version 2.0

Bit Description Read Write Value after

Reset

7:0

Interrupt Line Routing Value. Indicates to which system interrupt controller(s)

input the interrupt line is connected. The PCI 9052 does not use this value,

rather the value is used by device drivers and operating systems for priority

and vector information. Values in this register are system-architecture specific.

For x86-based PCs, the values in this register correspond to IRQ numbers

(0 through 15) of the standard dual 8259 interrupt controller configuration.

The value 255 is defined as “unknown” or “no connection” to the interrupt

controller. Values 15 through 255 are reserved.

Yes Yes 0h

Bit Description Read Write Value after

Reset

7:0

Interrupt Pin Register. Indicates which interrupt pin the device uses.

The following values are decoded:

0h = No Interrupt Pin

1h = INTA#

2h = INTB#

3h = INTC#

4h = INTD#

The PCI 9052 supports only INTA#. Because PCIHTR[7]=0, values 2h, 3h,

and 4h have no meaning. All other values (05h through FFh) are reserved

by PCI r2.2.

Yes Serial

EEPROM 1h

Bit Description Read Write Value after

Reset

7:0 Min_Gnt. Specifies the necessary length of a burst period device, assuming a

clock rate of 33 MHz. Value is a multiple of 1/4 µs increments. Not Supported.Yes No 0h

Bit Description Read Write Value after

Reset

7:0 Max_Lat. Specifies how often the device must gain access to the PCI Bus.

Value is a multiple of 1/4 µs increments. Not Supported.Yes No 0h

Section 8

Local Configuration Registers Registers

PCI 9052 Data Book, Version 2.0

8—Registers

8.3 LOCAL CONFIGURATION REGISTERS

Bit Description Read Write Value after

Reset

Memory Space Indicator. Value of 0 indicates Local Address Space 0

maps into PCI Memory space. Value of 1 indicates Local Address Space 0

maps into PCI I/O space.

Yes Yes 0

2:1

When mapped into Memory space, encoding is as follows:

00 = Locate anywhere in 32-bit PCI Address space

01 = PCI r2.1, Locate below 1-MB Memory Address space

PCI r2.2, Reserved

10 = Locate anywhere in 64-bit PCI Address space

11 = Reserved

When mapped into I/O space, bit 1 must be set to 0.

Bit 2 is included with bits [27:3] to indicate the decoding range.

Yes Yes 00

When mapped into Memory space, writing 1 indicates reads are prefetchable

(does not affect PCI 9052 operation, but is used for system status).

When mapped into I/O space, it is included with bits [27:2] to indicate the

decoding range.

Yes Yes 0

27:4

Specifies which PCI Address bits to use for decoding a PCI access to Local

Address Space 0. Each bit corresponds to a PCI Address bit. Bit 27

corresponds to address bit 27. Write 1 to all bits that are to be included in

decode and 0 to all others (used in conjunction with PCIBAR2). Default is

1MB.

Notes: Range (not Range register) must be power of 2. “Range register

value” is two’s complement of range.

User should limit each I/O-mapped space to 256 bytes per PCI r2.2.

Yes Yes FF0000h

31:28 Reserved. (PCI Address bits [31:28] are always included in decoding.) Yes No 0h

Section 8

Registers Local Configuration Registers

PCI 9052 Data Book, Version 2.0

Bit Description Read Write Value after

Reset

Memory Space Indicator. Value of 0 indicates Local Address Space 1

maps into PCI Memory space. Value of 1 indicates Local Address Space 1

maps into PCI I/O space.

Yes Yes 0

2:1

When mapped into Memory space, encoding is as follows:

00 = Locate anywhere in 32-bit PCI Address space

01 = PCI r2.1, Locate below 1-MB Memory Address space

PCI r2.2, Reserved

10 = Locate anywhere in 64-bit PCI Address space

11 = Reserved

When mapped into I/O space, bit 1 must be set to 0.

Bit 2 is included with bits [27:3] to indicate the decoding range.

Yes Yes 00

When mapped into Memory space, writing 1 indicates reads are prefetchable

(does not affect PCI 9052 operation, but is used for system status). When

mapped into I/O space, it is included with bits [27:2] to indicate the decoding

range.

Yes Yes 0

27:4

Specifies which PCI Address bits to use for decoding a PCI access to Local

Address Space 1. Each bit corresponds to a PCI Address bit. Bit 27

corresponds to address bit 27. Write 1 to all bits that are to be included in

decode and 0 to all others (used in conjunction with PCIBAR3).

Notes: Range (not Range register) must be power of 2. “Range register

value” is two’s complement of range.

User should limit each I/O-mapped space to 256 bytes per PCI r2.2.

Yes Yes 0h

31:28 Reserved. (PCI Address bits [31:28] are always included in decoding.) Yes No 0h

Section 8

Local Configuration Registers Registers

PCI 9052 Data Book, Version 2.0

8—Registers

Bit Description Read Write Value after

Reset

Memory Space Indicator. Value of 0 indicates Local Address Space 2

maps into PCI Memory space. Value of 1 indicates Local Address Space 2

maps into PCI I/O space.

Yes Yes 0

2:1

When mapped into Memory space, encoding is as follows:

00 = Locate anywhere in 32-bit PCI Address space

01 = PCI r2.1, Locate below 1-MB Memory Address space

PCI r2.2, Reserved

10 = Locate anywhere in 64-bit PCI Address space

11 = Reserved

When mapped into I/O space, bit 1 must be set to 0.

Bit 2 is included with bits [27:3] to indicate the decoding range.

Yes Yes 00

When mapped into Memory space, writing 1 indicates reads are prefetchable

(does not affect PCI 9052 operation, but is used for system status). When

mapped into I/O space, it is included with bits [27:2] to indicate the decoding

range.

Yes Yes 0

27:4

Specifies which PCI Address bits to use for decoding a PCI access to Local

Address Space 2. Each bit corresponds to a PCI Address bit. Bit 27

corresponds to address bit 27. Write 1 to all bits that are to be included in

decode and 0 to all others (used in conjunction with PCIBAR4).

Notes: Range (not Range register) must be power of 2. “Range register

value” is two’s complement of range.

User should limit each I/O-mapped space to 256 bytes per PCI r2.2.

Yes Yes 0h

31:28 Reserved. (PCI Address bits [31:28] are always included in decoding.) Yes No 0h

Section 8

Registers Local Configuration Registers

PCI 9052 Data Book, Version 2.0

Bit Description Read Write Value after

Reset

Memory Space Indicator. Value of 0 indicates Local Address Space 3

maps into PCI Memory space. Value of 1 indicates Local Address Space 3

maps into PCI I/O space.

Yes Yes 0

2:1

When mapped into Memory space, encoding is as follows:

00 = Locate anywhere in 32-bit PCI Address space

01 = PCI r2.1, Locate below 1-MB Memory Address space

PCI r2.2, Reserved

10 = Locate anywhere in 64-bit PCI Address space

11 = Reserved

When mapped into I/O space, bit 1 must be set to 0.

Bit 2 is included with bits [27:3] to indicate the decoding range.

Yes Yes 00

When mapped into Memory space, writing 1 indicates reads are prefetchable

(does not affect PCI 9052 operation, but is used for system status). When

mapped into I/O space, it is included with bits [27:2] to indicate the decoding

range.

Yes Yes 0

27:4

Specifies which PCI Address bits to use for decoding a PCI access to Local

Address Space 3. Each bit corresponds to a PCI Address bit. Bit 27

corresponds to address bit 27. Write 1 to all bits that are to be included in

decode and 0 to all others (used in conjunction with PCIBAR5).

Notes: Range (not Range register) must be power of 2. “Range register

value” is two’s complement of range.

User should limit each I/O-mapped space to 256 bytes per PCI r2.2.

Yes Yes 0h

31:28 Reserved. (PCI Address bits [31:28] are always included in decoding.) Yes No 0h

Bit Description Read Write Value after Reset

Address Decode Enable. Enabled only from serial EEPROM. To

disable, set the PCI Expansion ROM Address Decode Enable bit to 0

(PCIERBAR[0]=0).

Serial

EEPROM

Only

10:1 Reserved.Yes No 0h

27:11

Specifies PCI Address bits used to decode PCI-to-Local Bus Expansion

ROM. Each of the bits corresponds to an Address bit. Value of 1 indicates

the bits should be included in decode. Write a value of 0 to all others

(used in conjunction with PCIERBAR). Default is 64 KB; minimum range,

if enabled, is 2 KB, and maximum range allowed by PCI r2.2 is 16 MB.

Notes: Range (not Range register) must be power of 2. “Range

EROMRR should normally be programmed by way of the serial EEPROM

to a value of 0h, unless Expansion ROM is present on the Local Bus. If

the value is not 0h (default value is 64 KB), system BIOS may attempt to

allocate Expansion ROM address space and then access it at the local

base address specified in EROMBA (default value is 1 MB) to determine

whether the Expansion ROM image is valid. If the image is not valid,

as defined in Section 6.3.1.1 (PCI Expansion ROM Header Format) of

PCI r2.2, the system BIOS unmaps the Expansion ROM address space

it initially allocated, by writing 0h to PCIERBAR[31:0].

Yes Yes 11111111111100000

31:28 Reserved. (PCI Address bits [31:28] are always included in decoding.) Yes No 0h

Section 8

Local Configuration Registers Registers

PCI 9052 Data Book, Version 2.0

8—Registers

Bit Description Read Write Value after

Reset

Space 0 Enable. Value of 1 enables decoding of PCI addresses for Direct

Slave access to Local Address Space 0. Value of 0 disables decoding.

Note: PCIBAR2 can be enabled or disabled by setting or clearing this bit.

Yes Yes 0

1Reserved. Yes Yes 0

3:2 If Local Address Space 0 is mapped into Memory space, bits are not used.

When mapped into I/O space, included with bits [27:4] for remapping. Yes Yes 00

27:4

Remap PCI Address to Local Address Space 0 into Local Address Space.

Bits in this register remap (replace) PCI Address bits used in decode as Local

Address bits.

Note: Remap Address value must be a multiple of the Range (not the

Range register).

Yes Yes 0h

31:28 Reserved. (Local Address bits [31:28] do not exist in the PCI 9052.) Yes No 0h

Bit Description Read Write Value after

Reset

Space 1 Enable. Value of 1 enables decoding of PCI addresses for Direct

Slave access to Local Address Space 1. Value of 0 disables decoding.

Note: PCIBAR3 can be enabled or disabled by setting or clearing this bit.

Yes Yes 0

1Reserved. Yes Yes 0

3:2 If Local Address Space 1 is mapped into Memory space, bits are not used.

When mapped into I/O space, included with bits [27:4] for remapping. Yes Yes 00

27:4

Remap PCI Address to Local Address Space 1 into Local Address Space.

Bits in this register remap (replace) PCI Address bits used in decode as Local

Address bits.

Note: Remap Address value must be a multiple of the Range (not the

Range register).

Yes Yes 0h

31:28 Reserved. (Local Address bits [31:28] do not exist in the PCI 9052.) Yes No 0h

Section 8

Registers Local Configuration Registers

PCI 9052 Data Book, Version 2.0

Bit Description Read Write Value after

Reset

Space 2 Enable. Value of 1 enables decoding of PCI addresses for Direct

Slave access to Local Address Space 2. Value of 0 disables decoding.

Note: PCIBAR4 can be enabled or disabled by setting or clearing this bit.

Yes Yes 0

1Reserved. Yes No 0

3:2 If Local Address Space 2 is mapped into Memory space, bits are not used.

When mapped into I/O space, included with bits [27:4] for remapping. Yes Yes 00

27:4

Remap PCI Address to Local Address Space 2 into Local Address

Space. Bits in this register remap (replace) PCI Address bits used in decode

as Local Address bits.

Note: Remap Address value must be a multiple of the Range (not the

Range register).

Yes Yes 0h

31:28 Reserved. (Local Address bits [31:28] do not exist in the PCI 9052.) Yes No 0h

Bit Description Read Write Value after

Reset

Space 3 Enable. Value of 1 enables decoding of PCI addresses for Direct

Slave access to Local Address Space 3. Value of 0 disables decoding.

Note: PCIBAR5 can be enabled or disabled by setting or clearing this bit.

Yes Yes 0

1Reserved. Yes No 0

3:2 If Local Address Space 3 is mapped into Memory space, bits are not used.

When mapped into I/O space, included with bits [27:4] for remapping. Yes Yes 00

27:4

Remap PCI Address to Local Address Space 3 into Local Address Space.

Bits in this register remap (replace) PCI Address bits used in decode as Local

Address bits.

Note: Remap Address value must be a multiple of the Range (not the

Range register).

Yes Yes 0h

31:28 Reserved. (Local Address bits [31:28] do not exist in the PCI 9052.) Yes No 0h

Bit Description Read Write Value after Reset

10:0 Reserved. Yes No 0h

27:11

Remap PCI Expansion ROM Space into Local Address Space. Bits in

this register remap (replace) the PCI Address bits used in decode as

Local Address bits. Default base is 1 MB.

Note: Remap Address value must be a multiple of the Range (not the

Range register).

Yes Yes 00000001000000000

31:28 Reserved. (Local Address bits [31:28] do not exist in the PCI 9052.) Yes No 0h

Section 8

Local Configuration Registers Registers

PCI 9052 Data Book, Version 2.0

8—Registers

Note: In ISA Interface mode (MODE=0, INTCSR[12]=1),

bits [23, 21:6, 2, 0] must be 0, and bit 1 must be 1.

Bit Description Read Write Value after

Reset

0Burst Enable. Value of 1 indicates bursting is enabled. Value of 0 indicates

bursting is disabled. Bursting occurs if the prefetch count is not equal to 00. Yes Yes 0

1LRDYi# Input Enable. Value of 1 indicates enabled. Value of 0 indicates

disabled. Yes Yes 0

2BTERM# Input Enable. Value of 1 indicates BTERM# Input is enabled. Value

of 0 indicates BTERM# input is disabled. Burst length limited to four Lwords. Yes Yes 0

4:3

Prefetch Count. Number of Lwords to prefetch during Memory Read cycle.

Used only if bit 5 is high (prefetch count enabled). Values:

00 = Do not prefetch. Only read bytes specified by C/BE lines.

01 = Prefetch 4 Lwords if bit 5 is set.

10 = Prefetch 8 Lwords if bit 5 is set.

11 = Prefetch 16 Lwords if bit 5 is set.

Yes Yes 00

Prefetch Count Enable. Value of 1 prefetches up to the number of Lwords

specified in the prefetch count. Value of 0 ignores the count and prefetching

continues until terminated by the PCI Bus. To disable prefetch, enable the

Prefetch Counter and set the prefetch count to 0 (LAS0BRD[5:3]=100b).

Yes Yes 0

10:6 NRAD Wait States. Number of Read Address-to-Data wait states (0-31).

(Wait states between the Address cycle and first Read Data cycle.) Yes Yes 0h

12:11 NRDD Wait States. Number of Read Data-to-Data wait states (0-3).

(Wait states between consecutive Data cycles of a Burst read.) Yes Yes 00

14:13

NXDA Wait States. Number of Read/Write Data-to-Address wait states (0-3).

(Wait states between consecutive bus requests. NXDA wait states are only

inserted after the last Data transfer of a Direct Slave access.)

Yes Yes 00

19:15

NWAD Wait States. Number of Write Address-to-Data wait states (0-31).

LAD Bus data is valid during NWAD wait states. (Wait states between the

Address cycle and first Write Data cycle.)

Yes Yes 0h

21:20 NWDD Wait States. Number of Write Data-to-Data wait states (0-3).

(Wait states between consecutive Data cycles of a Burst write.) Yes Yes 00

23:22

Bus Width. Values:

00 = 8-bit

01 = 16-bit

10 = 32-bit

11 = Reserved

Yes Yes 10

24 Byte Ordering. Value of 1 indicates Big Endian. Value of 0 indicates

Little Endian. Yes Yes 0

Big Endian Byte Lane Mode. Value of 1 indicates that in Big Endian mode

byte lanes, [31:16] be used for a 16-bit Local Bus, and byte lane [31:24] for

an 8-bit Local Bus. Value of 0 indicates that in Big Endian mode byte lanes,

[15:0] be used for a 16-bit Local Bus, and byte lane [7:0] for an 8-bit Local Bus.

Yes Yes 0

27:26 Read Strobe Delay. Number of clocks from beginning of cycle until RD#

strobe is asserted (0-3). Value must be ≤ NRAD for RD# to be asserted. Yes Yes 00

29:28 Write Strobe Delay. Number of clocks from beginning of cycle until WR#

strobe is asserted (0-3). Value must be ≤ NWAD for WR# to be asserted. Yes Yes 00

31:30

Write Cycle Hold. Number of clocks from WR# de-assertion until end of cycle

(0-3). Data (LAD[31:0]) remains valid, and BLAST# remains asserted, during

Write Cycle Hold bus cycles.

Yes Yes 00

Section 8

Registers Local Configuration Registers

PCI 9052 Data Book, Version 2.0

Note: In ISA Interface mode (MODE=0, INTCSR[12]=1),

bits [23, 21:6, 4:2, 0] must be 0, and bits [5, 1] must be 1.

Bit Description Read Write Value after

Reset

0Burst Enable. Value of 1 indicates bursting is enabled. Value of 0 indicates

bursting is disabled. Bursting occurs if the prefetch count is not equal to 00. Yes Yes 0

1LRDYi# Input Enable. Value of 1 indicates enabled. Value of 0 indicates

disabled. Yes Yes 0

2BTERM# Input Enable. Value of 1 indicates BTERM# input is enabled. Value

of 0 indicates BTERM# input is disabled. Burst length limited to four Lwords. Yes Yes 0

4:3

Prefetch Count. Number of Lwords to prefetch during Memory Read cycle.

Used only if bit 5 is high (prefetch count enabled). Values:

00 = Do not prefetch. Only read bytes specified by C/BE lines.

01 = Prefetch 4 Lwords if bit 5 is set.

10 = Prefetch 8 Lwords if bit 5 is set.

11 = Prefetch 16 Lwords if bit 5 is set.

Yes Yes 00

Prefetch Count Enable. Value of 1 prefetches up to the number of Lwords

specified in the prefetch count. Value of 0 ignores the count and prefetching

continues until terminated by the PCI Bus. To disable prefetch, enable the

Prefetch Counter and set the prefetch count to 0 (LAS1BRD[5:3]=100b).

Yes Yes 0

10:6 NRAD Wait States. Number of Read Address-to-Data wait states (0-31).

(Wait states between the Address cycle and first Read Data cycle.) Yes Yes 0h

12:11 NRDD Wait States. Number of Read Data-to-Data wait states (0-3).

(Wait states between consecutive Data cycles of a Burst read.) Yes Yes 00

14:13

NXDA Wait States. Number of Read/Write Data-to-Address wait states (0-3).

(Wait states between consecutive bus requests. NXDA wait states are only

inserted after the last Data transfer of a Direct Slave access.)

Yes Yes 00

19:15

NWAD Wait States. Number of Write Address-to-Data wait states (0-31).

LAD Bus data is valid during NWAD wait states. (Wait states between the

Address cycle and first Write Data cycle.)

Yes Yes 0h

21:20 NWDD Wait States. Number of Write Data-to-Data wait states (0-3).

(Wait states between consecutive Data cycles of a Burst write.) Yes Yes 00

23:22

Bus Width. Values:

00 = 8-bit

01 = 16-bit

10 = 32-bit

11 = Reserved

Yes Yes 10

24 Byte Ordering. Value of 1 indicates Big Endian. Value of 0 indicates

Little Endian. Yes Yes 0

Big Endian Byte Lane Mode. Value of 1 indicates that in Big Endian mode

byte lanes, [31:16] be used for a 16-bit Local Bus, and byte lane [31:24] for

an 8-bit Local Bus. Value of 0 indicates that in Big Endian mode byte lanes,

[15:0] be used for a 16-bit Local Bus, and byte lane [7:0] for an 8-bit Local Bus.

Yes Yes 0

27:26 Read Strobe Delay. Number of clocks from beginning of cycle until RD#

strobe is asserted (0-3). Value must be ≤ NRAD for RD# to be asserted. Yes Yes 00

29:28 Write Strobe Delay. Number of clocks from beginning of cycle until WR#

strobe is asserted (0-3). Value must be ≤ NWAD for WR# to be asserted. Yes Yes 00

31:30

Write Cycle Hold. Number of clocks from WR# de-assertion until end of cycle

(0-3). Data (LAD[31:0]) remains valid, and BLAST# remains asserted, during

Write Cycle Hold bus cycles.

Yes Yes 00

Section 8

Local Configuration Registers Registers

PCI 9052 Data Book, Version 2.0

8—Registers

Bit Description Read Write Value after

Reset

0Burst Enable. Value of 1 indicates bursting is enabled. Value of 0 indicates

bursting is disabled. Bursting occurs if the prefetch count is not equal to 00. Yes Yes 0

1LRDYi# Input Enable. Value of 1 indicates enabled. Value of 0 indicates

disabled. Yes Yes 0

2BTERM# Input Enable. Value of 1 indicates BTERM# input is enabled. Value

of 0 indicates BTERM# input is disabled. Burst length limited to four Lwords. Yes Yes 0

4:3

Prefetch Count. Number of Lwords to prefetch during Memory Read cycle.

Used only if bit 5 is high (prefetch count enabled). Values:

00 = Do not prefetch. Only read bytes specified by C/BE lines.

01 = Prefetch 4 Lwords if bit 5 is set.

10 = Prefetch 8 Lwords if bit 5 is set.

11 = Prefetch 16 Lwords if bit 5 is set.

Yes Yes 0

Prefetch Count Enable. Value of 1 prefetches up to the number of Lwords

specified in the prefetch count. Value of 0 ignores the count and prefetching

continues until terminated by the PCI Bus. To disable prefetch, enable the

Prefetch Counter and set the prefetch count to 0 (LAS2BRD[5:3]=100b).

Yes Yes 0

10:6 NRAD Wait States. Number of Read Address-to-Data wait states (0-31).

(Wait states between the Address cycle and first Read Data cycle.) Yes Yes 0h

12:11 NRDD Wait States. Number of Read Data-to-Data wait states (0-3).

(Wait states between consecutive Data cycles of a Burst read.) Yes Yes 00

14:13

NXDA Wait States. Number of Read/Write Data-to-Address wait states (0-3).

(Wait states between consecutive bus requests. NXDA wait states are only

inserted after the last Data transfer of a Direct Slave access.)

Yes Yes 00

19:15

NWAD Wait States. Number of Write Address-to-Data wait states (0-31).

LAD Bus data is valid during NWAD wait states. (Wait states between the

Address cycle and first Write Data cycle.)

Yes Yes 0h

21:20 NWDD Wait States. Number of Write Data-to-Data wait states (0-3).

(Wait states between consecutive Data cycles of a Burst write.) Yes Yes 00

23:22

Bus Width. Values:

00 = 8-bit

01 = 16-bit

10 = 32-bit

11 = Reserved

Yes Yes 10

24 Byte Ordering. Value of 1 indicates Big Endian. Value of 0 indicates

Little Endian. Yes Yes 0

Big Endian Byte Lane Mode. Value of 1 indicates that in Big Endian mode

byte lanes, [31:16] be used for a 16-bit Local Bus, and byte lane [31:24] for

an 8-bit Local Bus. Value of 0 indicates that in Big Endian mode byte lanes,

[15:0] be used for a 16-bit Local Bus, and byte lane [7:0] for an 8-bit Local Bus.

Yes Yes 0

27:26 Read Strobe Delay. Number of clocks from beginning of cycle until RD#

strobe is asserted (0-3). Value must be ≤ NRAD for RD# to be asserted. Yes Yes 00

29:28 Write Strobe Delay. Number of clocks from beginning of cycle until WR#

strobe is asserted (0-3). Value must be ≤ NWAD for WR# to be asserted. Yes Yes 00

31:30

Write Cycle Hold. Number of clocks from WR# de-assertion until end of cycle

(0-3). Data (LAD[31:0]) remains valid, and BLAST# remains asserted, during

Write Cycle Hold bus cycles.

Yes Yes 00

Section 8

Registers Local Configuration Registers

PCI 9052 Data Book, Version 2.0

Bit Description Read Write Value after

Reset

0Burst Enable. Value of 1 indicates bursting is enabled. Value of 0 indicates

bursting is disabled. Bursting occurs if the prefetch count is not equal to 00. Yes Yes 0

1LRDYi# Input Enable. Value of 1 indicates enabled. Value of 0 indicates

disabled. Yes Yes 0

2BTERM# Input Enable. Value of 1 indicates BTERM# input is enabled. Value

of 0 indicates BTERM# input is disabled. Burst length limited to four Lwords. Yes Yes 0

4:3

Prefetch Count. Number of Lwords to prefetch during Memory Read cycle.

Used only if bit 5 is high (prefetch count enabled). Values:

00 = Do not prefetch. Only read bytes specified by C/BE lines.

01 = Prefetch 4 Lwords if bit 5 is set.

10 = Prefetch 8 Lwords if bit 5 is set.

11 = Prefetch 16 Lwords if bit 5 is set.

Yes Yes 00

Prefetch Count Enable. Value of 1 prefetches up to the number of Lwords

specified in the prefetch count. Value of 0 ignores the count and prefetching

continues until terminated by the PCI Bus. To disable prefetch, enable the

Prefetch Counter and set the prefetch count to 0 (LAS3BRD[5:3]=100b).

Yes Yes 0

10:6 NRAD Wait States. Number of Read Address-to-Data wait states (0-31).

(Wait states between the Address cycle and first Read Data cycle.) Yes Yes 0h

12:11 NRDD Wait States. Number of Read Data-to-Data wait states (0-3).

(Wait states between consecutive Data cycles of a Burst read.) Yes Yes 00

14:13

NXDA Wait States. Number of Read/Write Data-to-Address wait states (0-3).

(Wait states between consecutive bus requests. NXDA wait states are only

inserted after the last Data transfer of a Direct Slave access.)

Yes Yes 00

19:15

NWAD Wait States. Number of Write Address-to-Data wait states (0-31).

LAD Bus data is valid during NWAD wait states. (Wait states between the

Address cycle and first Write Data cycle.)

Yes Yes 0h

21:20 NWDD Wait States. Number of Write Data-to-Data wait states (0-3).

(Wait states between consecutive Data cycles of a Burst write.) Yes Yes 00

23:22

Bus Width. Values:

00 = 8-bit

01 = 16-bit

10 = 32-bit

11 = Reserved

Yes Yes 10

24 Byte Ordering. Value of 1 indicates Big Endian. Value of 0 indicates

Little Endian. Yes Yes 0

Big Endian Byte Lane Mode. Value of 1 indicates that in Big Endian mode

byte lanes, [31:16] be used for a 16-bit Local Bus, and byte lane [31:24] for

an 8-bit Local Bus. Value of 0 indicates that in Big Endian mode byte lanes,

[15:0] be used for a 16-bit Local Bus, and byte lane [7:0] for an 8-bit Local Bus.

Yes Yes 0

27:26 Read Strobe Delay. Number of clocks from beginning of cycle until RD#

strobe is asserted (0-3). Value must be ≤ NRAD for RD# to be asserted. Yes Yes 00

29:28 Write Strobe Delay. Number of clocks from beginning of cycle until WR#

strobe Is asserted (0-3). Value must be ≤ NWAD for WR# to be asserted. Yes Yes 00

31:30

Write Cycle Hold. Number of clocks from WR# de-assertion until end of cycle

(0-3). Data (LAD[31:0]) remains valid, and BLAST# remains asserted, during

Write Cycle Hold bus cycles.

Yes Yes 00

Section 8

Local Configuration Registers Registers

PCI 9052 Data Book, Version 2.0

8—Registers

Bit Description Read Write Value after

Reset

Burst Enable. Value of 1 indicates bursting is enabled. Value of 0 indicates

bursting is disabled. Bursting occurs if the prefetch count (bits [4:3]) are not

equal to 00.

Yes Yes 0

1LRDYi# Input Enable. Value of 1 indicates enabled. Value of 0 indicates

disabled. Yes Yes 0

2BTERM# Input Enable. Value of 1 indicates BTERM# input is enabled. Value

of 0 indicates BTERM# input is disabled. Burst length limited to four Lwords. Yes Yes 0

4:3

Prefetch Count. Number of Lwords to prefetch during Memory Read cycle.

Used only if bit 5 is high (prefetch count enabled). Values:

00 = Do not prefetch. Only read bytes specified by C/BE lines.

01 = Prefetch 4 Lwords if bit 5 is set.

10 = Prefetch 8 Lwords if bit 5 is set.

11 = Prefetch 16 Lwords if bit 5 is set.

Yes Yes 00

Prefetch Count Enable. Value of 1 prefetches up to the number of Lwords

specified in the prefetch count. Value of 0 ignores the count and prefetching

continues until terminated by the PCI Bus. To disable prefetch, enable the

Prefetch Counter and set the prefetch count to 0 (EROMBRD[5:3]=100b).

Yes Yes 0

10:6 NRAD Wait States. Number of Read Address-to-Data wait states (0-31).

(Wait states between the Address cycle and first Read Data cycle.) Yes Yes 0h

12:11 NRDD Wait States. Number of Read Data-to-Data wait states (0-3).

(Wait states between consecutive Data cycles of a Burst read.) Yes Yes 00

14:13

NXDA Wait States. Number of Read/Write Data-to-Address wait states (0-3).

(Wait states between consecutive bus requests. NXDA wait states are only

inserted after the last Data transfer of a Direct Slave access.)

Yes Yes 00

19:15

NWAD Wait States. Number of Write Address-to-Data wait states (0-31).

LAD Bus data is valid during NWAD wait states. (Wait states between the

Address cycle and first Write Data cycle.)

Yes Yes 0h

21:20 NWDD Wait States. Number of Write Data-to-Data wait states (0-3).

(Wait states between consecutive Data cycles of a Burst write.) Yes Yes 00

23:22

Bus Width. Values:

00 = 8-bit

01 = 16-bit

10 = 32-bit

11 = Reserved

Yes Yes 10

24 Byte Ordering. Value of 1 indicates Big Endian. Value of 0 indicates

Little Endian. Yes Yes 0

Big Endian Byte Lane Mode. Value of 1 indicates that in Big Endian mode

byte lanes, [31:16] be used for a 16-bit Local Bus, and byte lane [31:24] for

an 8-bit Local Bus. Value of 0 indicates that in Big Endian mode byte lanes,

[15:0] be used for a 16-bit Local Bus, and byte lane [7:0] for an 8-bit Local Bus.

Yes Yes 0

27:26 Read Strobe Delay. Number of clocks from beginning of cycle until RD#

strobe is asserted (0-3). Value must be ≤ NRAD for RD# to be asserted. Yes Yes 00

29:28 Write Strobe Delay. Number of clocks from beginning of cycle until WR#

strobe is asserted (0-3). Value must be ≤ NWAD for WR# to be asserted. Yes Yes 00

31:30

Write Cycle Hold. Number of clocks from WR# de-assertion until end of cycle

(0-3). Data (LAD[31:0]) remains valid, and BLAST# remains asserted, during

Write Cycle Hold bus cycles.

Yes Yes 00

Section 8

Registers Local Configuration Registers

PCI 9052 Data Book, Version 2.0

8.3.1 Chip Select Registers

Notes: Chip Select 0 (CS0#) is available in non-ISA Interface

mode only (INTCSR[12]=0). In ISA Interface mode (INTCSR[12]=1),

pin 130 is the ISA MEMRD# signal, and CS0BASE must be

programmed to match valid LAS0RR and LAS0BA register

configuration for Local Address Space 0.

For a chip select to assert, the address must be encompassed

within a Local Address Space.

Notes: Chip Select 1 (CS1#) is available in non-ISA Interface

mode only (INTCSR[12]=0). In ISA Interface mode (INTCSR[12]=1),

pin 131 is the ISA MEMWR# signal, and CS1BASE must be

programmed to match valid LAS1RR and LAS1BA register

configuration for Local Address Space 1.

For a chip select to assert, the address must be encompassed

within a Local Address Space.

Bit Description Read Write Value after

Reset

0Chip Select 0 Enable. Value of 1 indicates enabled. Value of 0 indicates

disabled. Yes Yes 0

27:1

Local Base Address of Chip Select 0. Write zeros (0) in the least significant

bits to define the range for Chip Select 0. Starting from bit 1 and scanning

toward bit 27, the first “1” found defines size. The remaining most significant

bits, excluding the first “1” found, define base address.

Yes Yes 0h

31:28 Reserved. Yes No 0h

Bit Description Read Write Value after

Reset

0Chip Select 1 Enable. Value of 1 indicates enabled. Value of 0 indicates

disabled. Yes Yes 0

27:1

Local Base Address of Chip Select 1. Write zeros (0) in the least significant

bits to define the range for Chip Select 1. Starting from bit 1 and scanning

toward bit 27, the first “1” found defines size. The remaining most significant

bits, excluding the first “1” found, define base address.

Yes Yes 0h

31:28 Reserved. Yes No 0h

Section 8

Local Configuration Registers Registers

PCI 9052 Data Book, Version 2.0

8—Registers

Notes: Chip Select 2 (CS2#) functionality of the USER2/CS2#

multiplexed pin is enabled by configuring CNTRL[6] from the default

value of 0 (USER2) to 1.

For a chip select to assert, the address must be encompassed

within a Local Address Space.

Notes: Chip Select 3 (CS3#) functionality of the USER3/CS3#

multiplexed pin is enabled by configuring CNTRL[9] from the default

value of 0 (USER3) to 1.

For a chip select to assert, the address must be encompassed

within a Local Address Space.

Bit Description Read Write Value after

Reset

0Chip Select 2 Enable. Value of 1 indicates enabled. Value of 0 indicates

disabled. Yes Yes 0

27:1

Local Base Address of Chip Select 2. Write zeros (0) in the least significant

bits to define the range for Chip Select 2. Starting from bit 1 and scanning

toward bit 27, the first “1” found defines size. The remaining most significant

bits, excluding the first “1” found, define the base address.

Yes Yes 0h

31:28 Reserved. Yes No 0h

Bit Description Read Write Value after

Reset

0Chip Select 3 Enable. Value of 1 indicates enabled. Value of 0 indicates

disabled. Yes Yes 0

27:1

Local Base Address of Chip Select 3. Write zeros (0) in the least significant

bits to define the range for Chip Select 3. Starting from bit 1 and scanning

toward bit 27, the first “1” found defines size. The remaining most significant

bits, excluding the first “1” found, define base address.

Yes Yes 0h

31:28 Reserved. Yes No 0h

Section 8

Registers Local Configuration Registers

PCI 9052 Data Book, Version 2.0

8.3.2 Control Registers

Bit Description Read Write Value after

Reset

0LINTi1 Enable. Value of 1 indicates LINTi1 is enabled. Value of 0 indicates

LINTi1 is disabled. Yes Yes 0

1 LINTi1 Polarity. Value of 1 indicates LINTi1 is active high. Value of 0 indicates

LINTi1 is active low. Yes Yes 0

2LINTi1 Status. Value of 1 indicates LINTi1 is active. Value of 0 indicates

LINTi1 is not active. Yes No 0

3LINTi2 Enable. Value of 1 indicates LINTi2 is enabled. Value of 0 indicates

LINTi2 is disabled. Yes Yes 0

4 LINTi2 Polarity. Value of 1 indicates LINTi2 is active high. Value of 0 indicates

LINTi2 is active low. Yes Yes 0

5LINTi2 Status. Value of 1 indicates LINTi2 is active. Value of 0 indicates

LINTi2 is not active. Yes No 0

6PCI Interrupt Enable. Value of 1 enables PCI interrupt. Yes Yes 0

7Software Interrupt. Value of 1 generates PCI interrupt (INTA# output

asserted) if the PCI Interrupt Enable bit is set (INTCSR[6]=1). Yes Yes 0

LINTi1 Select Enable. Value of 1 indicates enabled Edge Triggerable

interrupt. Value of 0 indicates enabled Level Triggerable interrupt.

Note: Operates only in High-Polarity mode (INTCSR[1]=1).

Yes Yes 0

LINTi2 Select Enable. Value of 1 indicates enabled Edge Triggerable

interrupt. Value of 0 indicates enabled Level Triggerable interrupt.

Note: Operates only in High-Polarity mode (INTCSR[4]=1).

Yes Yes 0

10 Local Edge Triggerable Interrupt Clear. Writing 1 to this bit clears LINTi1. Yes Yes 0

11 Local Edge Triggerable Interrupt Clear. Writing 1 to this bit clears LINTi2. Yes Yes 0

12 ISA Interface Mode Enable. Writing 1 enables ISA Interface mode.

Writing 0 disables ISA Interface mode. Yes

Serial

EEPROM

only

31:13 Reserved.Yes No 0

Section 8

Local Configuration Registers Registers

PCI 9052 Data Book, Version 2.0

8—Registers

and Initialization Control

Bit Description Read Write Value after

Reset

0User I/O 0 or WAITO# Pin Select. Selects the USER0/WAITO# pin function.

Value of 1 indicates pin is WAITO#. Value of 0 indicates pin is USER0. Yes Yes 0

1User I/O 0 Direction. Value of 0 indicates Input. Value of 1 indicates output.

The pin is always an output if the WAITO# function is selected. Yes Yes 0

User I/O 0 Data. If programmed as an output, writing 1 causes the

corresponding pin to go high. If programmed as an input, reading provides the

state of the corresponding pin.

Yes Yes 0

User I/O 1 or LLOCKo# Pin Select. Selects the USER1/LLOCKo# pin

function. Value of 1 indicates pin is LLOCKo#. Value of 0 indicates pin

is USER1.

Yes Yes 0

4User I/O 1 Direction. Value of 0 indicates Input. Value of 1 indicates output.

The pin is always an output if the LLOCKo# function is selected. Yes Yes 0

User I/O 1 Data. If programmed as an output, writing 1 causes corresponding

pin to go high. If programmed as an input, reading provides the state of the

corresponding pin.

Yes Yes 0

6User I/O 2 or CS2# Pin Select. Selects the USER2/CS2# pin function.

Value of 1 indicates pin is CS2#. Value of 0 indicates pin is USER2. Yes Yes 0

7User I/O 2 Direction. Value of 0 indicates Input. Value of 1 indicates output.

The pin is always an output if the CS2# function is selected. Yes Yes 0

User I/O 2 Data. If programmed as an output, writing 1 causes corresponding

pin to go high. If programmed as an input, reading provides the state of the

corresponding pin.

Yes Yes 0

9User I/O 3 or CS3# Pin Select. Selects the USER3/CS3# pin function.

Value of 1 indicates pin is CS3#. Value of 0 indicates pin is USER3. Yes Yes 0

10 User I/O 3 Direction. Value of 0 indicates Input. Value of 1 indicates output.

The pin is always an output if the CS3# function is selected. Yes Yes 0

User I/O 3 Data. If programmed as an output, writing 1 causes corresponding

pin to go high. If programmed as an input, reading provides the state of the

corresponding pin.

Yes Yes 0

13:12

PCI Configuration Base Address Register (PCIBAR) Enables. Values:

00, 11 = PCIBAR0 (Memory) and PCIBAR1 (I/O) enabled

01 = PCIBAR0 (Memory) only

10 = PCIBAR1 (I/O) only

Note: PCIBAR0 and PCIBAR1 should be enabled for the PC platform.

Yes Yes 00

PCI r2.1 Features Enable. When set to 1, the PCI 9052 performs all PCI

Read and Write transactions in compliance with PCI r2.1. Setting this bit

enables Delayed Reads, 32K PCI clock timeout on Retries, 16- and 8-clock

PCI latency rules, and enables the option to select PCI Read No Write mode

(Retries for writes) (CNTRL[17]) and/or PCI Read with Write Flush mode

(CNTRL[15]). Refer to Section 4.2.1.2 for additional information.

Value of 0 causes TRDY# to remain de-asserted on reads until Read data

is available. If Read data is not available before the PCI Direct Slave Retry

Delay Clocks counter (CNTRL[22:19]) expires, a PCI Retry is issued.

Yes Yes 0

PCI Read with Write Flush Mode. When the PCI r2.1 Features Enable bit

is set (CNTRL[14]=1), value of 1 flushes a pending Delayed Read cycle

if a Write cycle is detected. Value of 0 (or CNTRL[14]=0) does not affect

a pending Delayed Read when a Write cycle occurs.

Yes Yes 0

Section 8

Registers Local Configuration Registers

PCI 9052 Data Book, Version 2.0

PCI Read No Flush Mode. Value of 1 does not flush the Read FIFO if the

PCI Read cycle completes (Direct Slave Read Ahead mode). Value of 0

flushes the Read FIFO if a PCI Read cycle completes. Read Ahead mode

requires that Prefetch be enabled in the LASxBRD registers (where x is

the Local Address Space number) for the Memory-Mapped spaces that use

Read Ahead mode. The PCI 9052 flushes its Read FIFO for each I/O-Mapped

access.

Yes Yes 0

PCI Read No Write Mode (PCI Retries for Writes). When the PCI r2.1

Features Enable bit is set (CNTRL[14]=1), value of 1 forces a PCI Retry on

writes if a Delayed Read is pending. Value of 0 (or CNTRL[14] =0) allows

writes to occur while a Delayed Read is pending.

Yes Yes 0

PCI Write Release Bus Mode Enable. Value of 1 disconnects if the Write

FIFO becomes full. Value of 0 de-asserts TRDY# until space is available

in the Write FIFO (PCI Write Hold Bus mode).

Yes Yes 0

22:19

PCI Direct Slave Retry Delay Clocks. Number of PCI clocks (multiplied by 8)

from the beginning of a Direct Slave access, after which a PCI Retry is issued

if the transfer has not completed. Valid for Read cycles only if CNTRL[14]=0.

Valid for Write cycles only if CNTRL[18]=0.

Yes Yes 4h

23 Direct Slave LOCK# Enable. Value of 1 enables PCI Direct Slave locked

sequences. Value of 0 disables Direct Slave locked sequences. Yes Yes 0

Serial EEPROM Clock for PCI Bus Reads or Writes to Serial EEPROM.

Toggling this bit generates a serial EEPROM clock. (Refer to the

manufacturer’s data sheet for the particular serial EEPROM being used.)

Yes Yes 0

25 Serial EEPROM Chip Select. For PCI Bus reads or writes to serial EEPROM,

setting this bit to 1 provides the serial EEPROM Chip Select. Yes Yes 0

26 Write Bit to Serial EEPROM. For writes, this output bit is the input to the serial

EEPROM. Clocked into the serial EEPROM by the serial EEPROM clock. Yes Yes 0

27 Read Serial EEPROM Data Bit. For reads, this input bit is the serial EEPROM

output. Clocked out of the serial EEPROM by the serial EEPROM clock. Yes No —

28 Serial EEPROM Present. Value of 1 indicates a blank or programmed serial

EEPROM is present. Yes No 0

29 Reload Configuration Registers. When set to 0, writing 1 causes the

PCI 9052 to reload the Local Configuration registers from serial EEPROM. Yes Yes 0

PCI Adapter Software Reset. Value of 1 resets the PCI 9052 and issues a

reset to the Local Bus. The PCI 9052 remains in this reset condition until the

PCI Host clears this bit. The contents of the PCI and Local Configuration

registers are not reset. The PCI Interface is not reset.

Note: If Direct Slave Read Ahead mode is enabled (CNTRL[16]=1),

disable it prior to a software reset, or if following a software reset, perform

a Direct Slave read of any valid Local Bus address, except the next sequential

Lword referenced from the last Direct Slave read, to flush the Direct Slave

Read FIFO.

Yes Yes 0

31 Mask Revision. Yes No 0

and Initialization Control (Continued)

Bit Description Read Write Value after

Reset

PCI 9052 Data Book, Version 2.0

9—Pin Descriptions

9 PIN DESCRIPTIONS

9.1 PIN SUMMARY

Table 9-5 through Table 9-8 describe the pins

common to all Bus modes:

•Power and Ground

•Serial EEPROM Interface

•PCI System Bus Interface

•Local Bus Support

Table 9-9 and Table 9-10 describe the Local Bus Data

Transfer pins.

Unspecified pins are No Connects (NC).

For a visual view of the pinout, refer to Section 11.

The following table lists abbreviations used in this

section to represent pin types.

Note: Internal resistor values are nominal and may vary widely from

published values.

9.2 PULL-UP/PULL-DOWN RESISTOR

RECOMMENDATIONS

Suggested values for external pull-up and pull-down

resistors are from 1K to 10K Ohms.

9.2.1 Input Pins (Pin Type I)

This section discusses the pull-up and pull-down

resistor requirements for the following Local Bus input

pins—BTERM#, EEDO, LCLK, LHOLD, LINTi[2:1],

LRDYi#, MODE, TEST, pin 45 [CHRDY in ISA

Interface mode (INTCSR[12]=1) or No Connect (NC)

in non-ISA Interface mode (INTCSR[12]=0)], and pin

67 (NOWS# in ISA Interface mode or NC in non-ISA

Interface mode). (Refer to Table 9-2.)

The Local Bus TEST input internally connects to

ground through a 50K-Ohm pull-down resistor. The

internal pull-down resistor on the TEST input pin

selects normal logic operation. Tie TEST to ground for

normal operation.

The BTERM#, LRDYi#, and NOWS# Local Bus input

pins internally connect to VCC through an 80K-Ohm

pull-up resistor:

•If using the BTERM# and LRDYi# inputs, external

pull-up resistors are recommended.

•If using the NOWS# input (ISA Interface mode

only), an external pull-up resistor is recommended.

In non-ISA Interface mode, pin 67 (NC) can be tied

high or left open.

The following Local Bus input pins have no internal

pull-up/pull-down resistors:

•EEDO—Requires an external pull-up resistor if

a blank serial EEPROM or no serial EEPROM

is used.

•LHOLD—Should be pulled or driven low, or tied

to ground, to provide Local Bus ownership to the

PCI 9052.

Table 9-1. Pin Type Abbreviations

Abbreviation Pin Type

I/O Input and output

I Input only

O Output only

TS Three-state

OD Open drain

TP Totem pole

STS Sustained three-state—driven high for one

CLK before float

Table 9-2. Input Pin Pull-Up and Pull-Down Resistor

Recommendation Summary

Signal Recommendations

BTERM# Internal 80K-Ohm pull-up; if used,

add external pull-up

CHRDY/NC None internal, pull or tie high

EEDO Pull-up required, if no EEPROM or

blank serial EEPROM is present

LCLK 50-Ohm series resistor from BCLKO

LHOLD None internal, drive or tie low

LINTi[2:1] None internal, pull to inactive state

LRDYi# Internal 80K-Ohm pull-up; if used,

add external pull-up

MODE None internal, tie high or low

NOWS#/NC Internal 80K-Ohm pull-up

TEST Internal 50K-Ohm pull-down

Section 9

Pin Descriptions Pull-Up/Pull-Down Resistor Recommendations

PCI 9052 Data Book, Version 2.0

•LINTi[2:1]—If configured as level-sensitive

(default) in INTCSR[9:8], the pin should be

connected to a pull-up or pull-down resistor to

hold the signal in an inactive state, for the polarity

configured in INTCSR[4, 1]. If LINTi[2:1] is

configured as edge-triggered, the input is positive

edge-triggered, and should be pulled down to an

inactive state.

•MODE—Should be connected high for Multiplexed

mode, or low for Non-Multiplexed and ISA Interface

modes.

•Pin 45 (NC in non-ISA Interface mode or CHRDY

in ISA Interface mode)—Should be connected to

an external pull-up resistor. In non-ISA Interface

mode, pin 45 should be tied high.

9.2.2 Output Pins (Pin Type O)

This section discusses the pull-up and pull-down

resistor requirements for the following output pins—

ADS#, ALE (BALE in ISA Interface mode), BLCKO,

BLAST#, CS[1:0]# (MEMWR# and MEMRD#,

respectively, in ISA Interface mode), EECS, EEDI,

EESK, LA[27:2], LBE[3:0]# (SBHE, NC, ISAA1, and

ISAA0, respectively, in ISA Interface mode), LHOLDA,

LRESET# (LRESET in ISA Interface mode), LW/R#,

RD#, and WR#. (Refer to Table 9-3.)

The PCI 9052 drives Local Bus output signals when it

owns the Local Bus, and floats Local Bus output

signals (except BCLKO, CS[1:0]#, EECS, EEDI,

EESK, LHOLDA, and LRESET#/LRESET) when it

does not own the Local Bus. Totem-pole outputs are

always driven except during TEST pin assertion. The

PCI 9052 Local Bus output pins do not have internal

pull-up or pull-down resistors.

Three-state output pins are ADS#, ALE/BALE,

BLAST#, CS0#/MEMRD#, CS1#/MEMWR#, LA[27:2],

LBE0#/ISAA0, LBE1#/ISAA1, LBE2#, LBE3#/SBHE,

LW/R#, RD#, and WR#.

Totem-Pole output pins are BCLKO, EECS, EEDI,

EESK, LHOLDA, and LRESET#/LRESET.

9.2.3 I/O Pins (Pin Type I/O)

This section discusses the pull-up and pull-down

resistor requirements for the following I/O pins—

LAD[31:0], USER0/WAITO# (IORD# in ISA Interface

mode), USER1/LLOCKo# (IOWR# in ISA Interface

mode), USER2/CS2#, and USER3/CS3#. (Refer to

Table 9-3.)

The PCI 9052 drives Local Bus I/O signals when it

owns the Local Bus. When the PCI 9052 does not own

the Local Bus, it floats Local Bus I/O signals except

USER0/WAITO#, USER1/LLOCKo#, USER2/CS2#,

and USER3/CS3# configured as USERx outputs (and

except USER2/CS2#, and USER3/CS3# configured

as CS2# and CS3# outputs, refer to PCI 9052 Design

Notes #1). The PCI 9052 Local Bus I/O pins do not

have internal pull-up or pull-down resistors.

Table 9-3. Output Pin Pull-Up and Pull-Down

Resistor Recommendation Summary

Signal Recommendations

ADS# None needed if always Local Master

ALE/BALE

BCLKO 50-Ohm series resistor to LCLK

BLAST# None needed if always Local Master

CS[1:0]#/

MEMWR#/MEMRD#

None (always driven)

EECS

EEDI

EESK

LA[27:2]

None needed if always Local Master

LBE[3:0]#/

SBHE#/ISAA[1:0]

LHOLDA

None (always driven)

LRESET#/

LRESET

LW/R#

None needed if always Local MasterRD#

WR#

Table 9-4. I/O Pin Pull-Up and Pull-Down Resistor

Recommendation Summary

Signal Recommendations

LAD[31:0] Pull-downs recommended for unused

USER0/WAITO#/

IORD#

If USER0 input, pull to known state

If WAITO#, pull-up if not sole Master

If IORD#, pull-up if not sole Master

USER1/LLOCKo#/

IOWR#

If USER1 input, pull to known state

If LLOCKo#, pull-up if not sole Master

If IOWR#, pull-up if not sole Master

USER2/CS2# If USER2 input, pull to known state

If CS2#, none (always driven)

USER3/CS3# If USER3 input, pull to known state

If CS3#, none (always driven)

Section 9

Pull-Up/Pull-Down Resistor Recommendations Pin Descriptions

PCI 9052 Data Book, Version 2.0

9—Pin Descriptions

External pull-down resistors are recommended on the

LAD[31:0] I/O pins, to keep connected signals in a

known state or to keep unconnected inputs from

oscillating and using additional power.

External pull-up resistors are recommended on the

following I/O pins to keep the output signals in an

inactive state during float:

•USER0/WAITO# if configured as WAITO# output

•USER1/LLOCKo# if configured as LLOCKo# output

Note: Multiplexed pins are configured as inputs at reset. If output

functionality is programmed in serial EEPROM, pin configuration

occurs when the serial EEPROM contents are loaded following

PCI reset.

If any of the USER[3:0] multiplexed pins are

configured as USER inputs (default functionality), they

should be pulled to a known state.

Section 9

Pin Descriptions Pinout

PCI 9052 Data Book, Version 2.0

9.3 PINOUT

Table 9-5. Power, Ground, and Unused Pins

Symbol Signal Name

Total

Pins

Type Pin Number Function

NC Spare 2N/A 45, 67

No Connect pin in Non-Multiplexed and Multiplexed modes

only. In ISA and Non-Multiplexed/ISA Interface modes,

CHRDY is assigned to pin 45, and NOWS# is assigned

to pin 67.

TEST Test 1 I 99

Test pin. Pull high for test or reduced power state. Tie low

for normal operation. When TEST is pulled high, all outputs

except RD# (pin 126) are placed in high-impedance state.

RD# provides a NANDTREE output when TEST is

pulled high.

VDD Power 10 I

1, 10, 27, 41,

50, 66, 81, 103,

121, 146

Power supply pins (5V).

Liberal .01 to .1 µF decoupling capacitors should be placed

near the PCI 9052.

VSS Ground 10 I

9, 26, 40, 51,

65, 80, 104,

120, 147, 160

Ground pins.

Total 23

Table 9-6. Serial EEPROM Interface Pins

Symbol Signal Name

Total

Pins

Type Pin Number Function

EECS

Serial

EEPROM

Chip Select

8 mA

142 Serial EEPROM Chip Select.

EEDI

Serial

EEPROM

Data In

8 mA

145 Write data to serial EEPROM.

EEDO

Serial

EEPROM

Data Out

1I 143 Read data from serial EEPROM.

EESK Serial Data

Clock 1

8 mA

144 Serial EEPROM clock pin.

Total 4

Section 9

Pinout Pin Descriptions

PCI 9052 Data Book, Version 2.0

9—Pin Descriptions

Table 9-7. PCI System Bus Interface Pins

Symbol Signal Name

Total

Pins Pin Type Pin Number Function

AD[31:0] Address and Data 32

I/O

PCI

150-157, 2-8, 11,

23-25, 28-32,

34-39, 42-43

Multiplexed on the same PCI pins. A bus

transaction consists of an Address phase,

followed by one or more Data phases. The

PCI 9052 supports both Read and Write bursts.

C/BE[3:0]# Bus Command

and Byte Enables 4I

PCI 158, 12, 22, 33

Multiplexed on the same PCI pins. During the

Address phase of a transaction, defines the bus

command. During the Data phase, used as byte

enables.

For additional information, refer to PCI r2.1.

CLK Clock 1 I 149

Provides timing for all transactions on PCI and

is an input to every PCI device. PCI operates up

to 33 MHz.

DEVSEL# Device Select 1

STS

PCI

When actively driven, indicates the driving

device decoded its address as the current

access target.

FRAME# Cycle Frame 1I

PCI 13

Driven by the current Master to indicate

the beginning and duration of an access.

Asserted to indicate a bus transaction is

beginning. While asserted, Data transfers

continue. When de-asserted, the transaction

is in the final Data phase.

IDSEL Initialization

Device Select 1I

PCI 159 Chip select used during Configuration Read or

Write transactions.

INTA# Interrupt A 1

PCI

44 Requests an interrupt.

IRDY# Initiator Ready 1I

PCI 14

Indicates the ability of the initiating agent (Bus

Master) to complete the current Data phase of

the transaction.

LOCK# Lock 1I

PCI 18 Indicates an atomic operation that may require

multiple transactions to complete.

PAR Parity 1

I/O

PCI

Indicates even parity across AD[31:0] and

C/BE[3:0]#. Parity generation is required by all

PCI agents. PAR is stable and valid one clock

after the Address phase. For Data phases,

PAR is stable and valid one clock after IRDY#

is asserted on a Write transaction or TRDY#

is asserted on a Read transaction. Once PAR

is valid, it remains valid until one clock after

completion of the current Data phase.

PERR# Parity Error 1

STS

PCI

Indicates only the reporting of data parity errors

during all PCI transactions, except during

a Special cycle.

Section 9

Pin Descriptions Pinout

PCI 9052 Data Book, Version 2.0

RST# Reset 1I

PCI 148 Brings PCI-specific registers, sequencers,

and signals to a consistent state.

SERR# System Error 1

PCI

For reporting address parity errors, data parity

errors on the Special Cycle command, or any

other system error where the result will be

catastrophic.

STOP# Stop 1

STS

PCI

17 Indicates the current target is requesting the

Master to stop the current transaction.

TRDY# Target Ready 1

STS

PCI

Indicates the ability of the target agent (selected

device) to complete the current Data phase of

the transaction.

Total 49

Table 9-8. Local Bus Support Pins

Symbol Signal Name

Total

Pins Pin Type Pin Number Function

BCLKO Buffered Clock Out 1

24 mA

Provides a buffered version of the PCI clock for

optional use by the Local Bus. Not in phase with

the PCI clock.

CS[1:0]# Chip Selects 1

and 0 2

8 mA

131, 130

General purpose chip selects. The base and

range of each may be programmed in the

configuration registers.

In ISA Interface mode (MODE=0 and

INTCSR[12]=1), these pins are redefined as the

MEMRD# and MEMWR# signals. (Refer to

Table 9-11.)

Note: The PCI 9052 always drives CS[1:0]#.

(Refer to PCI 9052 Design Notes #1.)

LCLK Local Bus Clock 1 I 135 Local clock (required) up to 40 MHz; may be

asynchronous to the PCI clock.

LHOLD Hold Request 1 I 134

LHOLD is asserted by a Local Bus Master to

request Local Bus use. The PCI 9052 can be

made master of the Local Bus by pulling

LHOLD low (or by grounding LHOLD).

LHOLDA Hold Acknowledge 1

8 mA

133

Asserted by the PCI 9052 to grant Local Bus

control to a Local Bus Master. When the

PCI 9052 needs the Local Bus, it signals

a preempt by de-asserting LHOLDA.

Table 9-7. PCI System Bus Interface Pins (Continued)

Symbol Signal Name

Total

Pins Pin Type Pin Number Function

Section 9

Pinout Pin Descriptions

PCI 9052 Data Book, Version 2.0

9—Pin Descriptions

LINTi1 Local Interrupt 1 In 1 I 137

When enabled (INTCSR[0]=1) and asserted,

the LINTi1 Status bit sets (INTCSR[2]=1).

If the PCI Interrupt Enable bit is also set

(INTCSR[6]=1), then INTA# asserts.

LINTi1 is programmable for active-low or

active-high polarity in INTCSR[1] in the

default Level-Sensitive mode (INTCSR[8]=0).

Can be optionally configured as a positive

edge-triggered interrupt

(INTCSR[8, 1, 0]=111b) for ISA compatibility.

Level-sensitive interrupts are cleared when the

interrupt source is no longer active, or LINTi1 is

disabled. An edge-triggered interrupt is set and

latched by a LINTi1 low-to-high transition,

and cleared by setting the LINTi1 Local Edge

Triggerable Interrupt Clear bit (INTCSR[10]=1).

LINTi2 Local Interrupt 2 In 1 I 136

When enabled (INTCSR[3]=1) and asserted,

the LINTi2 Status bit sets (INTCSR[5]=1).

If the PCI Interrupt Enable bit is also set

(INTCSR[6]=1), then INTA# asserts.

LINTi2 is programmable for active-low or

active-high polarity in INTCSR[4] in the

default Level-Sensitive mode (INTCSR[9]=0).

Can be optionally configured as a positive

edge-triggered interrupt

(INTCSR[9, 4, 3]=111b) for ISA compatibility.

Level-sensitive interrupts are cleared when the

interrupt source is no longer active, or LINTi2 is

disabled. An edge-triggered interrupt is set and

latched by a LINTi2 low-to-high transition, and

cleared by setting the LINTi2 Local Edge

Triggerable Interrupt Clear bit (INTCSR[11]=1).

LRESET# Local Reset Out 1

8 mA

132

Asserted when the PCI 9052 is reset, and used

to reset devices on the Local Bus.

Note: LRESET# is inverted (LRESET) when

ISA Interface mode is enabled.

MODE Bus Mode 1 I 68

Selects the PCI 9052 Bus Operation mode.

0 = Non-Multiplexed mode

1 = Multiplexed mode

Must be 0 for ISA Interface mode.

USER0

WAITO#

User I/O 0

WAIT Out

I/O

8 mA

138

Can be programmed to be a configurable User

I/O pin, USER0, or the Local Bus WAIT Output

pin, WAITO#. WAITO# is asserted when wait

states are caused by the internal wait state

generator. Serves as an output to provide

ready-out status. Default functionality is

USER0 input.

In ISA Interface mode (MODE=0 and

INTCSR[12]=1), this pin must be configured

as USER0 output (CNTRL[1:0]=10b)

and is redefined as the IORD# signal.

(Refer to Table 9-11.)

Pin configuration occurs when the serial

EEPROM contents are loaded following

PCI reset, or upon subsequent writing to

CNTRL[1:0].

Table 9-8. Local Bus Support Pins (Continued)

Symbol Signal Name

Total

Pins Pin Type Pin Number Function

Section 9

Pin Descriptions Pinout

PCI 9052 Data Book, Version 2.0

USER1

LLOCKo#

User I/O 1

LLOCK Out

I/O

8 mA

139

Can be programmed to be a configurable

User I/O pin, USER1, or the Local Bus LLOCK

Output pin, LLOCKo#. LLOCKo# indicates an

atomic operation that may require multiple

transactions to complete and can be used

by the Local Bus to lock resources. Default

functionality is USER1 input.

In ISA Interface mode (MODE=0 and

INTCSR[12]=1), this pin must be configured

as USER1 output (CNTRL[4:3]=10b)

and is redefined as the IOWR# signal.

(Refer to Table 9-11.)

Pin configuration occurs when the serial

EEPROM contents are loaded following PCI

reset, or upon subsequent writing to the

CNTRL[4:3] register bits.

The PCI 9052 asserts LLOCKo# during the first

clock of an atomic operation (address cycle)

and de-asserts it a minimum of one clock

following the last bus access for the atomic

operation. LLOCKo# is de-asserted after the

PCI 9052 detects PCI FRAME#, with PCI

LOCK# de-asserted at the same time.

USER2

CS2#

User I/O 2

Chip Select 2 Out

I/O

8 mA

140

Can be programmed to be a configurable User

I/O pin, USER2, or as the Chip Select 2 Output

pin, CS2#. Default functionality is USER2 input.

Pin configuration occurs when the serial

EEPROM contents are loaded following PCI

reset, or upon subsequent writing to the

CNTRL[7:6] register bits.

Note: The PCI 9052 always drives CS2#.

(Refer to PCI 9052 Design Notes #1.)

USER3

CS3#

User I/O 3

Chip Select 3 Out

I/O

8 mA

141

Can be programmed to be a configurable User

I/O pin, USER3, or as the Chip Select 3 Output

pin, CS3#. Default functionality is USER3 input.

Pin configuration occurs when the serial

EEPROM contents are loaded following

PCI reset, or upon subsequent writing to

the CNTRL[10:9] register bits.

Note: The PCI 9052 always drives CS3#.

(Refer to PCI 9052 Design Notes #1.)

Total 14

Table 9-8. Local Bus Support Pins (Continued)

Symbol Signal Name

Total

Pins Pin Type Pin Number Function

Section 9

Pinout Pin Descriptions

PCI 9052 Data Book, Version 2.0

9—Pin Descriptions

Table 9-9. Mode-Independent Local Bus Data Transfer Pins

Symbol Signal Name

Total

Pins Pin Type Pin Number Function

ADS# Address Strobe 1

12 mA

123

Indicates valid address and the start of a new

Bus access. Asserted for the first clock of

a Bus access.

ALE Address Latch

Enable 1

8 mA

Asserted during the Address phase and

de-asserted before the Data phase. Pulse

width is dependent upon local clock (LCLK)

frequency.

In ISA mode (MODE=0, INTCSR[12]=1), this

pin generates both the BALE signal for Local

Address Spaces 0 and 1, and the ALE signal

for Spaces 2, 3, and Expansion ROM.

BLAST# Burst Last 1

8 mA

124

Signal driven by the current Local Bus Master

to indicate the last transfer in a Bus access.

BLAST# is not asserted until internal wait

states expire.

LRDYi# Local Ready In 1 I 128

Local ready input indicates Read data is on

the Local Bus, or that Write data is accepted.

LRDYi# is not sampled until internal wait

states expire [WAITO# de-asserted, provided

USER0/WAITO# is configured as WAITO#

(CNTRL[0]=1)]. LRDYi# is ignored when

BTERM# is enabled and asserted.

LW/R# Write/Read 1

8 mA

127 Asserted low for reads and high for writes.

RD# Read Strobe 1

12 mA

126

General purpose read strobe. The timing is

controlled by the current Bus Region Descriptor

states, unless Read Strobe Delay clocks are

programmed in bits [27:26]. Remains asserted

throughout Burst and NRDD wait states.

WR# Write Strobe 1

12 mA

125

General purpose write strobe. The timing is

controlled by the current Bus Region Descriptor

states, unless Write Strobe Delay clocks are

programmed in bits [29:28]. Remains asserted

throughout Burst and NWDD wait states.

The LAD data bus hold time can be extended

beyond WR# de-assertion if Write Cycle

Hold clocks are programmed in bits [31:30].

Total 7

Section 9

Pin Descriptions Pinout

PCI 9052 Data Book, Version 2.0

Table 9-10. Mode-Dependent Local Bus Data Transfer Pins

Symbol Signal Name

Total

Pins Pin Type Pin Number Function

BTERM# Burst Terminate 1 I 129

If disabled through the PCI 9052 Configuration

registers, the PCI 9052 bursts up to four

transactions, Lword transfer depends upon the

bus width and type.

If enabled, the PCI 9052 continues to burst until

BTERM# input is asserted. BTERM# is a ready

input that breaks up a Burst cycle and causes

another Address cycle to occur. BTERM# is not

sampled until internal wait states expire. LRDYi#

is ignored when BTERM# is enabled and

asserted.

BTERM# is not sampled until external wait

states expire [WAITO# de-asserted, provided

USER0/WAITO# is configured as WAITO#

(CNTRL[0]=1)].

LA[27:2] Address Bus 26

8 mA

122, 119-105,

102-100, 98-92

Carries the upper 26 bits of the 28-bit physical

address bus. Increments during bursts indicate

successive Data cycles.

LAD[31:0] Data Bus 32

I/O

8 mA

52-62, 69-79,

82-91

During the Data phase, the Bus carries 32-, 16-,

or 8-bit data quantities, depending on bus width

configuration:

•8-bit = LAD[7:0]

•16-bit = LAD[15:0]

•32-bit = LAD[31:0]

Multiplexed Mode Only—During the Address

phase, the Bus carries the 28-bit physical

address (LAD[27:0]).

Section 9

Pinout Pin Descriptions

PCI 9052 Data Book, Version 2.0

9—Pin Descriptions

LBE[3:0]# Byte Enables 4

12 mA

46-49

Byte enables are encoded based on configured

bus width.

32-Bit Bus

The four byte enables indicate which of the four

bytes are active during a data cycle:

•LBE3# Byte Enable 3 = LAD[31:24]

•LBE2# Byte Enable 2 = LAD[23:16]

•LBE1# Byte Enable 1 = LAD[15:8]

•LBE0# Byte Enable 0 = LAD[7:0]

16-Bit Bus

LBE[3, 1:0]# are encoded to provide BHE#, LA1,

and BLE#, respectively:

•LBE3# Byte High Enable (BHE#) = LAD[15:8]

•LBE2# Not Used

•LBE1# Address bit 1 (LA1)

•LBE0# Byte Low Enable (BLE#) = LAD[7:0]

8-Bit Bus

LBE[1:0]# are encoded to provide LA1 and LA0,

respectively:

•LBE3# Not Used

•LBE2# Not Used

•LBE1# Address bit 1 (LA1)

•LBE0# Address bit 0 (LA0)

Note: In ISA Interface mode (MODE=0 and

INTCSR[12]=1), pins 46 through 49 have dual

functionality, providing LBE[3:0]# for Local

Address Spaces 2 and 3 and Expansion ROM,

while providing ISAA0, ISAA1, and SBHE#

signals for Local Address Spaces 0 and 1

(ISA Memory and I/O).

Total 63

Table 9-10. Mode-Dependent Local Bus Data Transfer Pins (Continued)

Symbol Signal Name

Total

Pins Pin Type Pin Number Function

Section 9

Pin Descriptions Pinout

PCI 9052 Data Book, Version 2.0

Table 9-11. ISA Local Bus Data Transfer Pins (Non-Multiplexed Mode)

Symbol Signal Name

Total

Pins Pin Type Pin Number Function

BALE Bus Address Latch

Enable 1

8 mA

Asserted to indicate that the address and SBHE#

signal lines are valid. Asserted on the falling edge

of LCLK, and de-asserted on the next rising clock

edge. The address and byte enables are valid

for a minimum of two clocks prior to BALE

de-assertion.

BALE is generated for Local Address Spaces 0

and 1 (ISA Memory and I/0, respectively)

accesses only. For Local Address Spaces 2, 3,

and Expansion ROM, this pin generates the

ALE signal.

CHRDY Channel Ready 1 I 45

Input from the slave device to indicate that

additional time (wait states) is required to

complete cycle. A standard 16-bit transaction

lasts for three clock cycles, but can be extended

by de-asserting CHRDY within one clock cycle

after MEMRD#, MEMWR#, IORD#, or IOWR#

assertion. A standard 8-bit transaction lasts for six

clock cycles, but can be extended by de-asserting

CHRDY within three clock cycles after MEMRD#,

MEMWR#, IORD#, or IOWR# assertion.

IORD# I/O Read 1

8 mA

138

Command given to an ISA I/O slave device to

drive data onto the ISA Interface Data Bus.

IORD# asserts on the falling clock edge after

BALE de-asserts.

IOWR# I/O Write 1

8 mA

139

Command given to an ISA I/O slave device to

latch data from the ISA Interface Data Bus.

IOWR# asserts on the falling clock edge after

BALE de-asserts.

ISAA[1:0] ISA Address Bus 2

12 mA

48, 49

The ISA Interface Address bits. Bits [1:0] should

be used in conjunction with LA[23:2]. For a 16-bit

ISA Interface, ISAA0 is used as an LBE# signal.

For an 8-bit ISA Interface, ISAA0 is used as an

address bit.

LA[23:2] Address Bus 22

8 mA

116-105,

102-100, 98-92

Address Bus carries the upper 22 bits of the 28-bit

physical address bus.

LAD[7:0] Data Bus 8

I/O

8 mA

84-91 Bus carries 8-bit data quantities when configured

to 8-bit wide. LAD[0] is the least significant bit

LAD[15:0] Data Bus 16

I/O

8 mA

74-79, 82-91

Bus carries 16-bit data quantities when

configured to 16-bit wide. LA[15:8] correspond

to the high-order byte and LA[7:0] correspond

to the low-order byte.

Section 9

Pinout Pin Descriptions

PCI 9052 Data Book, Version 2.0

9—Pin Descriptions

LRESET ISA Interface

RESET DRV Out 1

8 mA

132

ISA connector pin B2. Asserted high when the

PCI 9052 is reset, and used to reset devices on

the Local Bus. At boot time, LRESET is de-

asserted during PCI reset, asserts a pulse width of

approximately 750 µs, and de-asserts shortly

before serial EEPROM initialization completes and

PCI BIOS configuration is allowed (time assumes

a 33.3 MHz PCI clock effecting a 960 ns serial

EEPROM clock period, and INTCSR register

loading to enable ISA Interface mode occurs after

780 serial EEPROM clocks).

Software reset (CNTRL[30]=1) asserts LRESET

until cleared by software.

MEMRD# Memory Read 1

8 mA

130

Command given to a memory slave to drive data

onto the ISA Interface Data Bus.

For 16-bit transactions, MEMRD# asserts on the

rising clock edge when BALE de-asserts. For 8-bit

transactions, MEMRD# asserts on the falling clock

edge after BALE de-asserts.

Note: The PCI 9052 always drives MEMRD#.

MEMWR# Memory Write 1

8 mA

131

Command given to a memory slave to latch data

from the ISA Interface Data Bus.

For 16-bit transactions, MEMWR# asserts on the

rising clock edge when BALE de-asserts. For 8-bit

transactions, MEMWR# asserts on the falling

clock edge after BALE de-asserts.

Note: The PCI 9052 always drives MEMWR#.

Table 9-11. ISA Local Bus Data Transfer Pins (Non-Multiplexed Mode) (Continued)

Symbol Signal Name

Total

Pins Pin Type Pin Number Function

Section 9

Pin Descriptions Pinout

PCI 9052 Data Book, Version 2.0

Note: In ISA Interface mode (MODE=0 and INTCSR[12]=1), pins

46, 48, and 49 have dual functionality, providing ISAA0, ISAA1, and

SBHE# signals for Local Address Spaces 0 and 1 (ISA Memory and

I/O), while providing LBE[3:0]# for Local Address Spaces 2 and 3

and Expansion ROM.

NOWS# No Wait States 1 I 67

Input from the slave device to indicate that current

cycle can be shortened after the Slave decodes

address and command signals. The NOWS#

signal is clocked into an internal register on

the falling edge of the clock. The internal state

machine then samples the registered version

of NOWS# on the next rising edge of the clock.

A standard 16-bit memory transaction lasts for

three clock cycles, but can be shortened to two

clock cycles by asserting both CHRDY and

NOWS# within about one-half clock cycle after

MEMRD# or MEMWR# assertion (one-half

clock period, less command strobe output

delay and NOWS# setup time). A standard 16-bit

I/O transaction lasts for three clock cycles, but can

be shortened to two clock cycles by asserting both

CHRDY and NOWS# prior to IORD# or IOWR#

assertion at the falling edge of the clock.

A standard 8-bit transaction lasts for six clock

cycles, but can be shortened to as few as

two clock cycles by asserting both CHRDY

and NOWS# within two clock cycles after

MEMRD#, MEMWR#, IORD#, or IOWR# assertion

(number of clock cycles between command strobe

assertion and NOWS# assertion, less command

strobe output delay and NOWS# setup time).

If CHRDY is de-asserted and NOWS# is asserted

(that is, when both inputs are low) during the same

clock, then NOWS# is ignored and wait states are

added as a function of CHRDY.

SBHE# System Byte

High Enable 1

12 mA

When asserted, indicates that a byte

is transferring onto the Data Bus upper

byte lane [15:8].

Total 57

Table 9-11. ISA Local Bus Data Transfer Pins (Non-Multiplexed Mode) (Continued)

Symbol Signal Name

Total

Pins Pin Type Pin Number Function

PCI 9052 Data Book, Version 2.0

10—Electrical Specifications

10 ELECTRICAL SPECIFICATIONS

10.1 GENERAL ELECTRICAL SPECIFICATIONS

Note: Package Power Dissipation derived with assumption

that 1.0m/s air flow is available.

The following table lists the package thermal resistance (Θj-a).

Table 10-1. Absolute Maximum Ratings

Specification Maximum Rating

Storage Temperature -65 to +150 °C

Ambient Temperature with Power Applied -55 to +125 °C

Supply Voltage to Ground -0.5 to +7.0V

Input Voltage (VIN)VSS -0.5V

VDD +0.5V

Output Voltage (VOUT)VSS -0.5V

VDD +0.5V

Maximum Package Power Dissipation 0.65W

Table 10-2. Operating Ranges

Ambient

Temperature Junction Temperature

Supply Voltage

(VDD)

Input Voltage (VIN)

Min Max

-40 to +85 °

°°

°C115 °C5V ±5% V

SS VDD

Table 10-3. Capacitance (Sample Tested Only)

Parameter Test Conditions Pin Type Typical Value Units

CIN

VIN = 2.0V

f = 1 MHz Input 5pF

COUT

VOUT = 2.0V

f = 1 MHz Output 10 pF

Table 10-4. Package Thermal Resistance

Air Flow

0m/s 1m/s 2m/s 3m/s

65 °C/W 45 °C/W 34 °C/W 30 °C/W

Section 10

Electrical Specifications Local Inputs

PCI 9052 Data Book, Version 2.0

10.2 LOCAL INPUTS

Local Bus Input Setup and Hold Times (Figure 10-1):

•Setup time = 8 ns maximum

•Hold time = 2 ns minimum

Definitions:

•TSETUP—Setup time. The time that an input signal

is stable before the rising edge of the Local Clock.

•THOLD—Time that an input signal is stable after the

rising edge of the Local Clock.

Figure 10-1. PCI 9052 Local Input Setup

and Hold Waveform

Table 10-5. Electrical Characteristics over Operating Range

Parameter Description Test Conditions Min Max Units

VOH

Output High

Voltage VDD = Min

VIN = VIH or VIL

IOH = -4.0 mA 2.4 —V

VOL

Output Low

Voltage

IOL = per Tables 9-6

and 9-8 through 9-11 —0.4 V

VIH Input High Level ——2.0 —V

VIL Input Low Level ———0.8 V

ILI

Input Leakage

Current VSS ≤ VIN ≤ VDD, VDD = Max -10 +10 µA

IOZ

Three-State

Output Leakage

Current

VSS ≤ VIN ≤ VDD, VDD = Max -10 +10 µA

ICC

Power Supply

Current VDD = 5.25V, PCLK = LCLK = 33 MHz —130 mA

Table 10-6. Clock Frequencies

Frequency Min Max

Local Clock Input 040 MHz

PCI Clock Input 033 MHz

Valid

Inputs

Local Clock

HOLD

SETUP

Section 10

Local Outputs Electrical Specifications

PCI 9052 Data Book, Version 2.0

10—Electrical Specifications

10.3 LOCAL OUTPUTS

Definition:

•TVALID—Output valid (clock-to-out). The time after

the rising edge of the Local Clock until the output

is stable.

Figure 10-2. PCI 9052 Local Output Delay (Min/Max)

Note: Values followed with an asterisk (*) are referenced from

the PCI Bus.

Valid

Outputs

Local Clock

(Min)

(Max)

VALID

Table 10-7. AC Electrical Characteristics (Local Outputs) Measured over Operating Range

Signals (Synchronous Outputs)

CL = 50 pF, VCC = 5.0 ±

±±

±5%

TVALID (Min) ns

(Hold)

TVALID ns

Typical Min/Max

TVALID (Max) ns

(Worst Case)

ADS# 37.4 10

BCLKO 2 7 8

BLAST# 59.4 16

CS[3:0]# 411 17

LA[27:2] 514 18.6

LAD[31:0] 514.6 16

LBE[3:0]# 48.4 15

LHOLDA 3—9

LLOCKo# —8—

LRESET# 5* 14 17*

LW/R# 47.8 12

RD# 713 16

USER[3:0] 4* 5* 12*

WAITO# —9.6 —

WR# 4 9 13

Section 10

Electrical Specifications Local Outputs

PCI 9052 Data Book, Version 2.0

Figure 10-3. PCI 9052 ALE Output Delay (Min/Max) to the Local Clock

Note: ALE pulse width is dependent upon clock frequency.

This timing differs from the PCI 9050 ALE output.

Figure 10-4. PCI 9052 BALE Output Delay (Min/Max) to the Local Clock

Note: Minimum address setup and hold times are shown. These

signals may assert earlier with respect to BALE assertion than

shown, and are valid for the entire ISA transaction, which may

extend for more clocks than shown.

2.5V 2.5V

Address Bus

4.7 / 9.9

4.9 / 10.3

7.1 / 15.0

Local Clock

ALE

high

- 0.5 / 0.2

high

5.5 / 11.6

LA[27:2]

ISAA[1:0]

SBHE#

Local Clock

BALE

5.5 / 11.5

3.9 / 8.2 5.1 / 10.6

5.0 / 8.3

2.5V LChigh

PCI 9052 Data Book, Version 2.0

11—Physical Specifications

11 PHYSICAL SPECIFICATIONS

11.1 MECHANICAL LAYOUT

For 160-pin PQFP

Figure 11-1. Mechanical Dimensions and Package Outline

28 ±0.1

0.3 ±0.1

31.2 ±0.4

120 81

121

160

Index

31.2 ±0.4

28 ±0.1

0.65

0.15 ±0.05

Dimensions in millimeters 0–10

0.8 ±0.2

1.6

4 Max

Pin 1

Section 11

Physical Specifications Typical Adapter Block Diagram

PCI 9052 Data Book, Version 2.0

11.2 TYPICAL ADAPTER BLOCK DIAGRAM

Figure 11-2. PCI 9052 Adapter Block Diagram

Note: Non-Multiplexed/ISA Interface mode refers to signals for

Local Address Spaces 2 and 3 and Expansion ROM with the

PCI 9052 in ISA Interface mode (INTCSR[12]=1).

LAD[31:0]

LA[27:2]

LBE[3:0]#

LINTi1

LINTi2

LCLK

LHOLD

LHOLDA

LRESET#

BCLKO

CS[1:0]#

USER0/WAITO#

USER1/LLOCKo#

USER2/CS2#

USER3/CS3#

ADS#

BLAST#

LW/R#

RD#

WR#

LRDYi#

BTERM#

ALE

LAD[31:0]

LINTi1

LINTi2

LCLK

LHOLD

LHOLDA

LRESET#

BCLKO

CS[1:0]#

USER0/WAITO#

USER1/LLOCKo#

USER2/CS2#

USER3/CS3#

ADS#

BLAST#

LW/R#

RD#

WR#

LRDYi#

BTERM#

ALE

LAD[15:0]

LINTi1

LINTi2

LCLK

LRESET

USER2/CS2#

USER3/CS3#

EESK

EEDO

EEDI

EECS

AD[31:0]

C/BE[3:0]#

PAR

FRAME#

IRDY#

TRDY#

STOP#

IDSEL

DEVSEL#

PERR#

SERR#

CLK

RST#

INTA#

LOCK#

PCI

9052

PCI Bus Interface

PCI Bus

Serial

EEPROM

Non-Multiplexed Multiplexed ISA Interface

LAD[31:0]

LINTi1

LINTi2

LRESET

BCLKO

USER2/CS2#

USER3/CS3#

LCLK

LHOLD

LHOLDA

ADS#

BLAST#

LW/R#

RD#

WR#

LRDYi#

BTERM#

Non-Multiplexed/

ISA Interface

Memory

I/O

Controller

Local Bus

LA[27:2]LA[23:2]

ISA Interface

ISAA[1:0]/LBE[1:0]#ISAA1, ISAA0

MEMRD#

MEMWR#

IORD#

IOWR#

SBHE#

MEMRD#

MEMWR#

IORD#

IOWR#

SBHE#

ALE or BALEBALE

CHRDY CHRDY

NOWS# NOWS#

MODE MODE MODE MODE

LBE[3:2]#

LBE[3:0]#

Section 11

Typical Adapter Block Diagram Physical Specifications

PCI 9052 Data Book, Version 2.0

11—Physical Specifications

This page intentionally left blank.

Section 11

Physical Specifications Pin Assignments

PCI 9052 Data Book, Version 2.0

11.3 PIN ASSIGNMENTS

Note: Refer to Section 9 for pin descriptions.

Figure 11-3. Pin Assignments, Non-Multiplexed and Multiplexed Modes

PCI 9052

Non-Multiplexed

and

Multiplexed Modes

LA27

ADS#

BLAST#

WR#

RD#

LW/R#

LRDYi#

BTERM#

CS0#

CS1#

LRESET#

LHOLDA

LHOLD

LCLK

LINTi2

LINTi1

USER0/WAITO#

USER1/LLOCKo#

USER2/CS2#

USER3/CS3#

EECS

EEDO

EESK

EEDI

RST#

CLK

AD31

AD30

AD29

AD28

AD27

AD26

AD25

AD24

C/BE3#

IDSEL

ADS#

BLAST#

WR#

RD#

LW/R#

LRDYi#

BTERM#

CS0#

CS1#

LRESET#

LHOLDA

LHOLD

LCLK

LINTi2

LINTi1

USER0/WAITO#

USER1/LLOCKo#

USER2/CS2#

USER3/CS3#

EECS

EEDO

EESK

EEDI

RST#

CLK

AD31

AD30

AD29

AD28

AD27

AD26

AD25

AD24

C/BE3#

IDSEL

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

AD23

AD22

AD21

AD20

AD19

AD18

AD17

AD16

C/BE2#

FRAME#

IRDY#

TRDY#

DEVSEL#

STOP#

LOCK#

PERR#

SERR#

PA R

C/BE1#

AD15

AD14

AD13

AD12

AD11

AD10

AD9

AD8

C/BE0#

AD7

AD6

AD5

AD4

AD3

AD2

AD23

AD22

AD21

AD20

AD19

AD18

AD17

AD16

C/BE2#

FRAME#

IRDY#

TRDY#

DEVSEL#

STOP#

LOCK#

PERR#

SERR#

PA R

C/BE1#

AD15

AD14

AD13

AD12

AD11

AD10

AD9

AD8

C/BE0#

AD7

AD6

AD5

AD4

AD3

AD2

LAD10

LAD11

LAD12

LAD13

LAD14

LAD15

LAD16

LAD17

LAD18

LAD19

LAD20

MODE

ALE

BCLKO

LAD21

LAD22

LAD23

LAD24

LAD25

LAD26

LAD27

LAD28

LAD29

LAD30

LAD31

LBE0#

LBE1#

LBE2#

LBE3#

INTA#

AD0

AD1

LAD10

LAD11

LAD12

LAD13

LAD14

LAD15

LAD16

LAD17

LAD18

LAD19

LAD20

MODE

ALE

BCLKO

LAD21

LAD22

LAD23

LAD24

LAD25

LAD26

LAD27

LAD28

LAD29

LAD30

LAD31

LBE0#

LBE1#

LBE2#

LBE3#

INTA#

AD0

AD1

TEST

LAD0

LAD1

LAD2

LAD3

LAD4

LAD5

LAD6

LAD7

LAD8

LAD9

LA26

LA25

LA24

LA23

LA22

LA21

LA20

LA19

LA18

LA17

LA16

LA15

LA14

LA13

LA12

LA11

LA10

LA9

TEST

LA8

LA7

LA6

LA5

LA4

LA3

LA2

LAD0

LAD1

LAD2

LAD3

LAD4

LAD5

LAD6

LAD7

LAD8

LAD9

120

119

118

117

116

115

114

113

112

111

110

109

108

107

106

105

104

103

102

101

100

VDD

VSS

VDD

VSS

VDD

VSS

VDD

VSS

VDD

VSS

VDD

VSS

Non-Multiplexed

Multiplexed

Section 11

Pin Assignments Physical Specifications

PCI 9052 Data Book, Version 2.0

11—Physical Specifications

Figure 11-4. Pin Assignments, ISA and Non-Multiplexed/ISA Interface Modes

Notes: Non-Multiplexed/ISA Interface mode refers to signals for

Local Address Spaces 2 and 3 and Expansion ROM with the

PCI 9052 in ISA Interface mode (INTCSR[12]=1).

LRESET is inverted when ISA Interface mode is enabled.

PCI 9052

ISA Interface and

Non-Multiplexed/ISA Interface Modes

MEMRD#

MEMWR#

LRESET

LCLK

LINTi2

LINTi1

IORD#

IOWR#

USER2/CS2#

USER3/CS3#

EECS

EEDO

EESK

EEDI

RST#

CLK

AD31

AD30

AD29

AD28

AD27

AD26

AD25

AD24

C/BE3#

IDSEL

LA27

ADS#

BLAST#

WR#

RD#

LW/R#

LRDYi#

BTERM#

MEMRD#

MEMWR#

LRESET

LHOLDA

LHOLD

LCLK

LINTi2

LINTi1

IORD#

IOWR#

USER2/CS2#

USER3/CS3#

EECS

EEDO

EESK

EEDI

RST#

CLK

AD31

AD30

AD29

AD28

AD27

AD26

AD25

AD24

C/BE3#

IDSEL

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

AD23

AD22

AD21

AD20

AD19

AD18

AD17

AD16

C/BE2#

FRAME#

IRDY#

TRDY#

DEVSEL#

STOP#

LOCK#

PERR#

SERR#

PA R

C/BE1#

AD15

AD14

AD13

AD12

AD11

AD10

AD9

AD8

C/BE0#

AD7

AD6

AD5

AD4

AD3

AD2

AD23

AD22

AD21

AD20

AD19

AD18

AD17

AD16

C/BE2#

FRAME#

IRDY#

TRDY#

DEVSEL#

STOP#

LOCK#

PERR#

SERR#

PAR

C/BE1#

AD15

AD14

AD13

AD12

AD11

AD10

AD9

AD8

C/BE0#

AD7

AD6

AD5

AD4

AD3

AD2

LAD10

LAD11

LAD12

LAD13

LAD14

LAD15

LAD16

LAD17

LAD18

LAD19

LAD20

MODE

NOWS#

ALE/BALE

BCLKO

LAD21

LAD22

LAD23

LAD24

LAD25

LAD26

LAD27

LAD28

LAD29

LAD30

LAD31

LBE0#/ISAA0

LBE1#/ISAA1

LBE2#

LBE3#/SBHE#

CHRDY

INTA#

AD0

AD1

LAD10

LAD11

LAD12

LAD13

LAD14

LAD15

MODE

NOWS#

BALE

BCLKO

ISAA0/LBE#

ISAA1

SBHE#

CHRDY

INTA#

AD0

AD1

LA26

LA25

LA24

LA23

LA22

LA21

LA20

LA19

LA18

LA17

LA16

LA15

LA14

LA13

LA12

LA11

LA10

LA9

TEST

LA8

LA7

LA6

LA5

LA4

LA3

LA2

LAD0

LAD1

LAD2

LAD3

LAD4

LAD5

LAD6

LAD7

LAD8

LAD9

LA23

LA22

LA21

LA20

LA19

LA18

LA17

LA16

LA15

LA14

LA13

LA12

LA11

LA10

LA9

TEST

LA8

LA7

LA6

LA5

LA4

LA3

LA2

LAD0

LAD1

LAD2

LAD3

LAD4

LAD5

LAD6

LAD7

LAD8

LAD9

120

119

118

117

116

115

114

113

112

111

110

109

108

107

106

105

104

103

102

101

100

VDD

VSS

VDD

VSS

VDD

VSS

VDD

VSS

VDD

VSS

VDD

VSS

ISA Interface

Non-Multiplexed/

ISA Interface

PCI 9052 Data Book, Version 2.0

A—General Information

A GENERAL INFORMATION

The PLX PCI 9052 family provides low-cost

connectivity for PCI slave designs. It is specifically

targeted at easing the transition of existing ISA

designs to the more feature-rich and performance-

oriented PCI Bus. The PCI 9052 provides Direct Slave

PCI functions by interfacing the adapter’s I/O circuitry

(control, address, and data lines) to a host computer’s

microprocessor/memory architecture by way of the

32-bit PCI Bus, which typically runs at 33 MHz.

A.1 ORDERING INSTRUCTIONS

Continuing its drive to provide single-chip PCI

interfaces for every market, PLX offers to designers its

PCI 9052 PCI Bus Target Chip with Glueless ISA

Interface Logic for Low-Cost Adapters.

A.2 UNITED STATES

AND INTERNATIONAL

REPRESENTATIVES,

AND DISTRIBUTORS

A list of PLX Technology, Inc., representatives and

distributors can be found at http://www.plxtech.com.

A.3 TECHNICAL SUPPORT

PLX Technology, Inc., technical support information is

listed at http://www.plxtech.com; or call 408 774-9060

or 800 759-3735.

Package Ordering Part Number

160-pin PQFP PCI 9052

PCI 9052 Data Book, Version 2.0

Index

Abort, Target 2-1, 8-4

AC electrical characteristics 10-3

accelerator, I/O 1-1

accesses

address decode enable 8-9

burst 2-3, 2-10, 4-1, 4-3

byte 2-1, 8-3

decode 4-4, 8-11

Direct Slave 2-1, 2-2, 4-1, 4-4, 4-5, 4-6, 8-15, 8-16

I/O 2-1, 4-1, 4-3, 8-3, 8-6

Local Bus 2-7, 2-10, 4-3

locked atomic operations 4-1

Lword 2-1, 8-3

Max_Lat 8-10

memory 2-8, 3-4, 3-5

memory base address 8-6–8-8

partial Lword 2-9

PCI 4-1, 8-11, 8-26

PCI base address registers 8-6–8-8

read 2-10, 4-3

word 2-1, 8-3

write 2-10

AD[31:0] 2-1, 9-5, 11-4, 11-5

adapter block diagram 11-2

address

base registers 4-1

bits for decoding 4-4

boundary 2-9

burst start 2-9

chip select registers 8-2, 8-22

cycle 2-8, 2-9, 4-3

decode 4-4, 6-1, 8-9, 8-14, 8-15, 8-16

detected 7-2

Direct Slave 4-4, 4-6

EROMBA 8-2, 8-16

invariance 2-1, 2-10

local bits 2-2

Local Bus

data transfer pins 9-9–9-12

initialization 4-4

local chip selects 6-1–6-2

local space registers 5-1, 5-2, 5-4, 5-5, 8-2, 8-11–8-20

local spaces 1-7, 2-10

mapping 4-4

PCI base address registers 8-6–8-8

PCI system bus interface pins 9-5

Read Ahead mode, Direct Slave 4-2

serial EEPROM register load sequence 3-2–3-4

spaces 1-1, 1-2, 2-2, 2-4, 4-4

strobe 9-9

translation 4-1

Address/Data 2-3

ADS# 2-3, 2-4, 2-8, 4-2, 9-9, 10-3, 11-4, 11-5

ALE 2-3, 2-4, 4-2, 5-1, 5-2, 9-2, 9-9, 10-4, 11-4, 11-5

arbitration, Local Bus 2-3, 2-5, 2-12, 4-8

atomic operations

LLOCKo# 2-4, 9-8

LOCK# 4-1, 9-5, 11-4

back-to-back, fast 8-3, 8-4

BALE 5-1, 5-2, 5-6, 5-7, 9-2, 9-12, 10-4, 11-5

BCLKO 1-2, 1-3, 1-5, 9-2, 9-6, 10-3, 11-4, 11-5

Big/Little Endian

See Endian, Big/Little

BIOS 2-1, 3-4, 3-5, 5-1, 5-2, 5-5, 7-1, 7-2, 8-14

BIST 8-1, 8-5

BLAST# 2-3, 2-8, 4-7, 9-9, 10-3, 11-4, 11-5

block diagrams 1-3

adapter 11-2

Local Bus 2-2

BTERM# 2-3, 2-7, 2-8, 4-22, 4-28, 4-29, 4-30, 5-5, 8-17,

8-18, 8-19, 8-20, 8-21, 9-10, 11-4, 11-5

built-in self test (BIST) 8-1, 8-5

burst

access 4-1, 4-3

last 9-9

Min_Gnt 8-10

mode and continuous burst mode (Bterm) 2-8–2-10

PCI read 4-1

read or write 9-5

terminate 9-10

Bus operation 2-1–2-12

bus region descriptors 4-4, 4-5

registers 2-4, 8-2, 8-7, 8-8, 8-17–8-21, 9-9

bus states 2-3

byte enables

C/BE[3:0]# 2-1, 8-17, 8-18, 8-19, 8-20, 8-21, 9-5,

11-4, 11-5

Direct Slave 4-6, 4-6–4-7

LBE[3:0]# 1-2, 1-3, 2-3, 2-4, 9-11

byte merging

to device

PCI 9052 Data Book, Version 2.0

byte merging

2-1–2-2

byte swapping 8-19

See Endian, Big/Little, byte ordering and lane mode

C/BE[3:0]# 2-1, 4-2, 8-17, 8-18, 8-19, 8-20, 8-21, 9-5,

11-4, 11-5

cache line size, PCI 1-2, 3-4, 8-1, 8-5

capacitance 10-1

chip select

base address registers 6-1–6-3

IDSEL 9-5, 11-4

initialization device 9-5, 11-4

local 1-1, 1-2, 6-1–6-3

Local Bus support pins 9-6–9-8

procedure to use base address registers 6-2–6-3

registers 5-3, 5-4, 8-2, 8-22, 8-23

serial EEPROM 3-3, 8-26, 9-4

timing diagram 4-16, 6-3

CHRDY 1-3, 1-5, 5-1, 5-2, 5-6, 5-6–5-7, 9-1, 9-4,

9-12, 11-5

CIS 8-1, 8-9

CLK 9-1, 9-5, 11-4, 11-5

clocks

16- and 8-clock rules 4-2, 8-25

32000 PCI timeout 4-2

BCLKO 1-2, 1-3, 1-5, 9-2

buffered PCI 1-7

Bus access 9-9

CLK (PCI) 9-5

delay 8-26

Direct Slave Retry delay 4-3, 4-7, 8-26

EESK 3-1, 9-4

frequencies 10-2

LCLK 1-2, 1-3, 1-5, 2-3, 9-2, 9-6

local 2-3, 4-2, 7-2, 9-6, 10-2, 10-3, 10-4

PCI 1-2, 1-3, 1-5, 1-7, 3-1, 3-6, 4-2, 4-9, 7-2, 8-25, 8-26,

9-2, 9-6, 10-2

PCIMGR 8-10

serial data 9-4

serial EEPROM 3-1, 3-2, 5-2, 8-26, 9-4

TTL 1-2, 1-3, 1-5, 9-2

CMOS, low-power 1-2

CNTRL 1-7, 5-2, 5-4, 5-5, 7-2, 8-2, 8-25–8-26

command codes, Direct Slave 2-1

CompactPCI, Hot Swap capable 1-7

configuration

BTERM# 9-10

bus width 1-2, 1-3, 1-5, 9-2, 9-11

command type 2-1

Endian, Big/Little 4-3

ID 8-3

IDSEL 9-5, 11-4

initialization from serial EEPROM timing diagram 3-6

read and write 9-5, 11-4

registers 4-1, 9-10

timing diagrams, initialization 4-9–4-16

wait state counter 2-7

Continuous Burst mode 2-8–2-9

Control/Status 2-4

conversion, Big/Little Endian 1-7, 4-3

counter

prefetch 1-7, 4-1

wait state 2-7

CPU, Host 2-5

CS[1:0]# 1-3, 1-5, 5-1, 5-2, 5-4, 9-2, 9-6, 11-4

CS[3:0]# 5-6, 10-3

CS0BASE 5-3, 5-4, 8-2, 8-22

CS1BASE 5-4, 8-2, 8-22

CS2# 1-3, 1-6, 5-2, 7-2, 8-25, 9-2, 9-8, 11-4, 11-5

CS2BASE 5-4, 8-2, 8-23

CS3# 5-2, 7-2, 8-25, 9-8, 11-4, 11-5

CS3BASE 5-4, 8-2, 8-23

Data Transfer mode 1-1, 4-1–4-6

decode

accesses 4-4

address 4-4, 8-15, 8-16

address enable 8-9

memory 8-12, 8-13

Delayed Read mode, Direct Slave 1-2, 1-7, 2-10,

4-2, 8-25

descriptors, bus region 2-4, 4-4, 8-2, 8-7, 8-8,

8-17–8-21, 9-9

Design Notes, PCI 9052 1-4, 3-1, 9-2, 9-6, 9-8

device

add-in board 8-9

bridge 8-4

chip select control provided 6-1

configuration header 3-4

ID 3-1, 3-3, 3-4, 8-1, 8-3

initialization select 9-5

Local Bus 2-2, 9-7

Master 2-4

non-PCI 2-2

other bridge 8-4

PCI 9-5

ROM 4-1

Slave 2-4

SRAM 6-2

DEVSEL#

to ID

PCI 9052 Data Book, Version 2.0

Index

DEVSEL#

8-4, 9-5, 11-4, 11-5

Direct Master, not supported 2-5

Direct Slave

accesses, 8- or 16-bit Local Bus 2-2

BTERM# input 2-8

byte enables 4-6–4-7

CNTRL register 8-2, 8-25–8-26

command codes 2-1

Delayed Read mode 1-7, 4-2, 8-25

Direct Data Transfer mode 4-1–4-4

Endian, Big/Little 2-10

FIFO 4-7, 8-25

Lword accesses 2-9

operation 4-1–4-42

PCI-to-Local address 4-4

Read Ahead mode 1-2, 2-10, 3-1, 4-1, 4-1–4-3, 4-34, 5-1,

5-4, 8-26

single read, timing diagrams 4-18, 4-19, 4-38

single write, timing diagrams 4-17, 4-37

space enable in local address space registers 8-15, 8-16

wait states 2-7

disconnect

Direct Slave I/O accesses, after transfer 4-1

PCI Bus 3-5, 4-3

TRDY# 4-7

drivers

bus 1-2

SERR# 8-3

EECS 1-3, 1-5, 3-2, 9-2, 9-4, 11-4, 11-5

EEDI 1-3, 1-5, 9-2, 9-4, 11-4, 11-5

EEDO 1-3, 1-5, 9-2, 9-4, 11-4, 11-5

EESK 1-3, 1-5, 9-2, 9-4, 11-4, 11-5

electrical specifications 10-1–10-4

Endian, Big

byte ordering and lane mode 8-19

Endian, Big, timing diagrams 4-37–4-42

Endian, Big/Little 2-10–2-11

byte ordering and lane mode 8-17–8-21

byte swapping 1-2

conversion 1-7, 4-3

ISA requirements 5-5

Endian, Little (as a PCI Bus) 2-1

EROMBA 8-2, 8-16

EROMBRD 8-2, 8-21

EROMRR 8-2, 8-14

Errata, PCI 9052 1-4, 3-4, 8-9

Expansion ROM 8-2, 8-14, 8-16, 8-21

PCI-to-Local 3-3

spaces 2-2, 2-10, 3-3, 3-5, 4-1, 4-3, 4-4, 4-6, 8-1,

8-9, 8-16

fast back-to-back 8-3, 8-4

FIFOs

bi-directional 1-1

Continuous Burst mode 2-9

Direct Slave 4-1, 4-2, 4-3, 8-25

Read Ahead mode 3-1, 8-26

number of 1-7

response to 4-7

FM93C46L 3-2

FM93CS56 3-2

FRAME# 9-5, 11-4, 11-5

frequencies 10-2

functional description 3-1–4-42

generator

internal wait states 2-3

interrupts 1-2

programmable wait state 4-1, 9-10

header

format 8-14

PCI Expansion ROM format 8-14

PCI type 3-4, 8-5

High-Polarity mode 8-24

hold and setup waveform, local input 10-2

Host CPU 2-5

Hot Swap capable, CompactPCI 1-7

I/O 2-1

access 4-1, 4-3, 8-6

base address 8-6

devices 5-6

ISA space 5-2, 5-4, 5-5

mapped configuration registers 8-1

pin type 9-5

space access 8-3, 8-6, 8-7, 8-8, 8-11, 8-13, 8-15, 8-16

user 7-1

i960J function, not supported 2-9

device and vendor 1-2, 1-7, 3-2, 3-3, 3-4, 8-1, 8-3

revision 3-4, 8-1, 8-4

subsystem 3-3, 8-1, 8-9

IDSEL

to Local Bus

PCI 9052 Data Book, Version 2.0

IDSEL

9-5, 11-4, 11-5

initialization

configuration timing diagrams 4-9–4-16

control register 8-2, 8-25–8-26

Direct Slave example 4-6

Direct Slave initialization 4-4

functional description 3-1

IDSEL 9-5, 11-4

Local Bus Direct Slave 4-4

PCI 4-6

reset 4-4

serial EEPROM timing diagram, from 3-6, 4-9

INTA# 4-12, 7-1, 7-2, 7-3, 8-10, 9-5, 11-4, 11-5

INTCSR 5-1, 5-2, 5-4, 7-2, 8-24, 9-13

internal wait states 2-3, 2-4, 2-7, 2-8, 2-10, 4-19–4-24,

4-27–4-33, 4-38–4-42, 5-5, 8-17–8-21, 9-9

Interrupt Request

See IRQ

interrupts 7-1–7-6

control/status 3-4

generator 1-2

INTA# 9-5

ISA requirements 5-5

local 4-13, 7-4, 9-7

pin 3-3

registers 3-5, 8-1, 8-2, 8-10, 8-24

request 4-12, 7-3, 8-10, 9-5, 11-4

timing diagrams 7-3–7-6

IORD# 5-2, 5-4, 5-6, 5-6–5-7, 9-12, 11-5

IOWR# 5-2, 5-4, 5-6, 5-6–5-7, 9-12, 11-5

IRDY# 2-1, 9-5, 11-4, 11-5

IRQ 7-1, 7-2

ISA Interface mode 1-2, 1-3, 1-5, 1-7, 4-6, 5-1–5-14,

9-2, 9-11

designs A-1

INTA# trigger 7-1, 7-2

Local Bus data transfer pins 9-12

logic configuration 6-1

LRESET inverted 9-7

pin assignments 9-6, 11-5

timing diagrams 5-8–5-14

ISA memory cards, 8-bit 5-2

ISAA[1:0] 5-1, 9-12, 11-5

LA[23:2] 9-12, 11-5

LA[27:2] 1-2, 1-3, 2-2, 2-3, 5-1, 9-10, 10-3, 11-4, 11-5

LAD[15:0] 9-12, 11-5

LAD[31:0] 1-2, 1-3, 2-3, 2-10, 4-6, 5-1, 9-10, 10-3,

11-4, 11-5

LAD[7:0] 9-12, 11-5

LAS0BA 5-1, 5-4, 8-2, 8-15

LAS0BRD 5-3, 5-4, 5-5, 5-7, 8-2, 8-17

LAS0RR 5-3, 5-4, 8-2, 8-11

LAS1BA 5-1, 5-4, 8-2, 8-15

LAS1BRD 5-3, 5-4, 5-5, 5-7, 8-2, 8-18

LAS1RR 5-3, 5-4, 8-2, 8-12

LAS2BA 8-2, 8-16

LAS2BRD 5-7, 8-2, 8-19

LAS2RR 8-2, 8-13

LAS3BA 8-2, 8-16

LAS3BRD 8-2, 8-20

LAS3RR 8-2, 8-14

latency timer, PCI not supported 8-1, 8-5

LBE[3:0]# 1-2, 1-3, 1-5, 2-4, 4-2, 4-6, 9-2, 9-11, 10-3,

11-4, 11-5

LCLK 1-2, 1-3, 1-5, 2-3, 9-2, 9-6, 10-2, 11-4, 11-5

Level-Sensitive mode 7-1, 7-2, 9-7

LHOLD 1-5, 2-5, 9-1, 9-6, 11-4, 11-5

LHOLDA 1-5, 2-5, 9-1, 9-6, 10-3, 11-4, 11-5

LINTi1 1-5, 4-12, 7-2, 7-3, 9-1, 9-7, 11-4, 11-5

LINTi2 1-5, 4-12, 7-2, 7-3, 9-1, 9-7, 11-4, 11-5

LLOCKo# 1-3, 1-6, 1-7, 2-4, 5-1, 5-2, 7-2, 8-25, 9-2,

9-8, 10-3, 11-4

local

clocks 7-2, 9-6, 10-2, 10-3

input setup figure 10-2

interrupts 7-1

signal output delay 10-3

Local Address

bits LA[1:0] 2-2, 2-9, 4-6, 9-11

Direct Slave example 4-6

EROMBA 8-2, 8-16

mapping 4-4

PCI base address registers 8-7–8-8

space registers 5-1, 5-2, 5-3, 5-4, 5-5, 5-7, 8-2,

8-11–8-20

spaces 1-7, 4-1, 8-1

Local Bus

1-1, 1-2, 1-3, 1-5, 1-7, 2-1–2-12, 9-1

arbitration 4-8

characteristics 4-4

control 4-3

data transfer pins 9-9–9-14

Delayed Read mode, Direct Slave 4-2

Direct Slave

access 4-5

operation 4-1

memory map example 6-2

prefetch counter 4-1

Read Ahead mode, Direct Slave 3-1, 4-2, 8-26

local chip selects

to Non-Multiplexed mode

PCI 9052 Data Book, Version 2.0

Index

region

descriptors 4-4, 8-2, 8-17–8-21, 9-9

registers 8-2, 8-17–8-21

response to FIFO 4-7

support pins 9-6–9-8

timing diagrams, Multiplexed mode 4-37–4-42

timing diagrams, Non-Multiplexed mode 4-17–4-36

width 4-6

local chip selects

See chip select

Local configuration registers 8-11–8-21

address mapping 8-2

lock

cycles 1-7

Direct Slave (atomic operations) 4-1

Direct Slave enable 8-26

LOCK# 4-1, 9-5, 11-4

mechanism and sequences 1-2

LOCK# 4-1, 9-5, 11-4, 11-5

LRDYi# 1-2, 1-3, 1-5, 2-3, 2-4, 2-7, 2-8, 2-10, 4-1, 9-1,

9-9, 11-4, 11-5

LRESET (ISA) 5-1, 5-2, 9-13, 11-5

LRESET# 1-3, 1-6, 3-1, 3-6, 4-9, 5-1, 5-2, 9-2, 9-7,

10-3, 11-4

LW/R# 2-4, 9-9, 11-4, 11-5

map

memory 6-2

read accesses 4-3

remap 4-4, 4-6

serial EEPROM memory 3-2

mapping

local registers 4-1

memory, PCI prefetchable 2-1–2-2, 8-7, 8-8

registers 8-2, 8-15–8-16

mask revision 8-26

maximum rating 10-1

mechanical layout 11-1

memory

accesses 2-8, 3-4, 3-5, 8-6–8-8

address spaces 8-7–8-13

base address 8-6–8-8

BTERM# 2-8

commands aliased to basic 2-1

decode 8-11, 8-12, 8-13

devices 2-2, 5-6

Direct Slave transfer 4-3

local controller 2-7

map example 6-2

mapped configuration registers 8-1

mapping 8-11, 8-12, 8-13, 8-15, 8-16

mapping, prefetchable 2-1–2-2, 8-7, 8-8

PCI base address registers 8-6–8-8

prefetchable 8-7, 8-8

read 2-1, 4-3

remap 8-15, 8-16

serial EEPROM map 3-2

space indicator 8-6–8-14

spaces 8-12–8-16

timing diagrams 4-11

write 2-1, 8-5

MEMRD# 1-3, 1-5, 5-1, 5-2, 5-4, 5-6, 5-6–5-7, 9-2, 9-6,

9-13, 11-5

MEMWR# 1-3, 1-5, 5-1, 5-2, 5-4, 5-6, 5-6–5-7, 9-2, 9-6,

9-13, 11-5

MODE 1-3, 1-6, 2-5, 9-2, 9-7, 11-4, 11-5

Multiplexed mode

Endian, Big/Little 2-10

input pins 9-1–9-2

LAD[31:0] bus 2-3

Local Bus 2-2–2-11

interface and Bus cycles 2-5

programming to 1-1, 1-2

support pins 9-7, 9-10

timing diagrams 4-37–4-42

types 2-5

output pins 9-2

pin assignments 11-4

recovery states 2-3, 2-9

multiplexed pins

I/O 7-2, 9-3, 9-6–9-8

PCI System Bus interface 9-5, 9-6–9-8

NANDTREE 9-4

NC (unused pins) 1-3, 1-5, 5-1, 5-2, 9-1, 9-3, 9-4,

11-4, 11-5

networking 1-1

Non-Multiplexed mode

Endian, Big/Little 2-10

ISA requirements 5-1, 5-6

LAD[31:0] bus 2-3

Local Bus 2-2–2-11

ISA Interface mode data transfer pins 9-12–9-14

programming to 1-1, 1-2

support pins 9-7

timing diagrams 4-17–4-36

pin assignments 11-4

NOWS#

to pins, ISA Local Bus Data Transfer

PCI 9052 Data Book, Version 2.0

NOWS#

1-3, 1-5, 5-3, 5-6–5-7, 9-1, 9-4, 9-14, 11-5

NRAD, NRDD, NWAD, NWDD, and NXDA 2-8, 5-5,

8-17–8-21