Copyright © Cirrus Logic, Inc. 2006
(All Rights Reserved)
http://www.cirrus.com
CS49300 Family DSP
Multi-Standard Audio Decoder Family
Features
zCS4930X: DVD Audio Sub-family
— PES Layer decode for A/V sync
— DVD Audio Pack Layer Support
— Meridian Lossless Packing Specification (MLP)™
— Dolby Digital™, Dolby Pro Logic II™
— MPEG-2, Advanced Audio Coding Algorithm (AAC)
— MPEG Multichannel
— DTS Digital Surround™, DTS-ES Extended Surround™
zCS4931X: Broadcast Sub-family
— PES Layer decode for A/V sync
— Dolby Digital
— MPEG-2, Advanced Audio Coding Algorithm (AAC)
— MPEG-1 (Layers 1, 2, 3) Stereo
— MPEG-2 (Layers 2, 3) Stereo
zCS4932X: AVR Sub-family
— Dolby Digital, Dolby Pro Logic II
— DTS & DTS-ES decoding with integrated DTS tables
— Cirrus Original Surround 5.1 PCM Enhancement
— MPEG-2, Advanced Audio Coding Algorithm (AAC)
— MPEG Multichannel
— MP3 (MPEG-1, Layer 3)
zCS49330: General Purpo se Audio DSP
—THX
® Surround EX™ and THX® Ultra2 Cinema
— General Purpose AVR and Broadcast Audio Decoder
(MPEG Multichannel, MPEG Stereo, MP3, C.O.S.)
— Car Audio
zFeatures are a super-set of the CS4923/4/5/6/7/8/9
— 8 channel output, including dual zone output capability
— Dynamic Channel Remapability
— Supports up to 192 kHz Fs @ 24-bit throughput
— Increased memory/MIPs
— SRAM Interface for increased delay and buffer capabi lity
— Dual-Precision Bass Manager
— Enhance your system functionality via firmware
upgrades through the Crystal WareTM Software
Licensing Program
Description
The CS493XX is a family of multichannel audio decoders
intended to supersede the CS4923/4/5/6/7/8/9 family as the
leader of audio decoding in both the DVD, broadcast and
receiver markets. The family will be split into parts tailored for
each of these distinct market segments.
For the DVD market, parts will be offered which support Meridian
Lossless Packing (MLP), Dolby Digital, Dolby Pro Logic II,
MPEG Multichannel, DTS Digital Surround, DTS-ES, AAC, and
subsets thereof. For the receiver market, parts will be offered
which support Dolby Digital, Dolby Pro Logic II, MPEG
Multichannel, DTS Digital Surround, D TS-ES, AAC, and various
virtualizers and PC M enhancement alg orithms such as HDCD ®,
DTS Neo:6TM, LOGIC7®, and SRS Circle Surround II®. For the
broadcast market, parts will be offered which support Dolby
Digital, AAC, MPEG-1, Layers 1,2 and 3, MPEG-2, Layers 2 and
3.
Under the Crystal brand, Cirrus Logic is the only single supplier
of high-performance 24-bit mu lti-standard audio D SP decod ers,
DSP firmware, and high-resolution data converters. This
combination of DSPs, system firmware, and data converters
simplify rapid creation of world-class high-fidelity digital audio
products for the Internet age.
Ordering Information: See page 87
APPLICATION CORE DECODER FUNCTIONALITY
CS49300 DVD Audio MLP, AC-3, AAC, DTS, MPEG 5.1, MP3, etc.
CS49310 Broadcast AAC, AC-3, MPEG Stereo, MP3, etc.
CS49311 Broadcast AAC, MPEG Stereo, MP3, etc.
CS49312 Broadcast AC-3, MPEG Stereo, MP3, etc.
CS49325 AVR AC-3, COS, MPEG 5.1, MP3, etc.
CS49326 AVR AC-3, DTS, COS, MPEG 5.1, MP3, etc.
CS49329 AVR AC-3, AAC, DTS, MPEG 5.1, MP3, etc.
CS49330 Car Audio DSP Car Audio Code
CS49330 General Purpose MPEG 5.1, MPEG Ster eo, MP3, C.O. S., etc
CS49330 Post-Processor DPP, THX Surround EX, THX Ultra2 Cinema
DATA7:0,
CS
Parallel or Serial Host Interface
CMPCLK,
Compressed
PLL
FILT1 VA
Framer
DD
DC
MCLK
SCLK
LRCLK
AUDATA[2.0]
XMT958/AUDATA3
CMPDAT,
SCLKN2
CMPREQ,
LRCLKN2
SCLKN1,
STCCLK2
LRCLKN1
SDATAN1
Data Input
Interface
Digital
Audio
Input
Interface
FILT2 AGND
Clock Manager
CLKIN
CLKSEL
Shifter
Input
Buffer
Controller
RAM Input
Buffer
DGND[3:1] VD[3:1]
24-Bit
DSP Processing
RAM
Program
Memory
RAM
Data
Memory
ROM
Program
Memory
ROM
Data
Memory
STC
EMAD7:0,
GPIO7:0
R/
W
,
EMOE
,
GPIO11
RD
,
DS
,
EMWR
,
GPIO10
WR
,SCDOUT,
PSEL,
GPIO9
SCDIO,
A0,
SCCLK A1,
SCDIN
ABOOT
,
INTREQ EXTMEM
,
GPIO8
Output
Formatter
RAM
Buffer
Output
RESET
SDATAN2
APR ‘06
DS339F7
CS49300 Family DSP
2DS339F7
TABLE OF CONTENTS
1. CHARACTERISTICS AND SPECIFICATIONS.................................................................7
1.1 Specified Operating Conditions ..................................................................................7
1.2 Absolute Maximum Ratings ........................................................................................7
1.3 Thermal Data ..............................................................................................................7
1.4 Digital D.C. Characteristics .........................................................................................8
1.5 Power Supply Characteristics .....................................................................................8
1.6 Switching Characteristics — RESET ........................................................................9
1.7 Switching Characteristics — CLKIN .... ... ... ... .... ... ... ... .... ... ... ... ... .... ... ... ... ................ .... .9
1.8 Switching Characteristics — Intel® Host Mode .........................................................10
1.9 Switching Characteristics — Motorola® Host Mode ..................................................12
1.10 Switching Characteristics — SPI™ Control Port .....................................................14
1.11 Switching Characteristics — I2C® Control Port .......................................................16
1.12 Switching Characteristics — Digital Audio Input .....................................................18
1.13 Switching Characteristics — Serial Bursty Data Input ............. ................. ... ... ... ... ...20
1.14 Switching Characteristics — Parallel Data Input .....................................................21
1.15 Switching Characteristics — Digital Audio Output ...................................................22
2. FAMILY OVERVIEW .......................................................................................................24
2.1 CS493XX Document Strategy ..................................................................................24
2.2 Multichannel Decoder Family of Parts ......................................................................24
3. TYPICAL CONNECTI ON DIAGR A MS .............. .... ... ... ................ ... .... ... ... ... .... ...............27
3.1 Multiplexed Pins ........................................................................................................27
3.2 Termination Requirements ........................................................................................27
3.3 Phase Locked Loop Filter ... ................ ... ... ... .... ... ... ... .... ... ... ................ ... .... ... ... ... ... ...28
4. POWER ...........................................................................................................................35
4.1 Decoupling ................................................................................................................ 35
4.2 Analog Power Conditioning .......................................................................................35
4.3 Ground ......................................................................................................................35
4.4 Pads ..........................................................................................................................35
5. CLOCKING .....................................................................................................................35
6. CONTROL ....... ...................... ....................... ....................... ...................... ......................36
6.1 Serial Communication ...............................................................................................36
6.1.1 SPI Communication ......... ... ................. ... ... ... .... ... ... ... ... .... ... ................ ... ... ...36
6.1.2 I2C Communication . ... ... ... ... .... ... ... ................ .... ... ... ... ... .... ... ... ... ................ ...38
6.1.3 INTREQ Behavior: A Special Case ..............................................................41
6.2 Parallel Host Communication ....................................................................................44
6.2.1 Intel Parallel Host Communication Mode ... ... .... ... ... ... ... .... ... ... ... .... ... ... ... ... ...46
6.2.2 Motorola Parallel Host Communication Mode ..............................................47
6.2.3 Procedures for Parallel Host Mode Communication .....................................48
7. EXTERNAL MEMORY ....................................................................................................51
7.1 Non-Paged Memory ..................................................................................................51
7.2 Paged Memory .........................................................................................................52
8. BOOT PROCEDURE & RESET .....................................................................................54
8.1 Host Boot ..................................................................................................................54
8.1.1 Serial Download Sequence .......... ... .... ... ... ... .... ... ... ... ... .... ... ... ... .... ... ... .........54
8.1.2 Parallel Download Sequence ........................................................................57
8.2 Autoboot ....................................................................................................................57
8.2.1 Autobo ot INT REQ Behavior ..........................................................................60
8.3 Decreasing Autoboot Times Using GFABT Codes (Fast Autoboot) .........................61
8.3.1 Design Considerations when using GFABT Codes ......................................63
CS49300 Family DSP
DS339F7 3
8.4 Internal Boot ............................................................................................................. 63
8.5 Application Failure Boot Message ............................................................................ 63
8.6 Resetting the CS493XX ...... ... ... ... ... .... ... ................................................................... 63
8.7 External Memory Examples ...................................................................................... 64
8.7.1 Non-Paged Autoboot Memory ............. ... ... ... .... ... ... ................ ... .... ... ... ... ... ... 64
8.7.2 32 Kilobyte Paged Autoboot Memory ........................................................... 65
8.8 CDB49300-MEMA.0 ................................................................................................. 66
9. HARDWARE CONFIGURATION ................................................................................... 68
10.DIGITAL INPUT & OUTPUT ........................................................................................... 69
10.1 Digital Audio Formats .............................................................................................. 69
10.1.1 I2S .............................................................................................................. 69
10.1.2 Left Justified ............................................................................................... 69
10.1.3 Multichannel ............................................................................................... 69
10.2 Digital Audio Input Port ........................................................................................... 70
10.3 Compressed Data Input Port ................................................................................... 70
10.4 Byte Wide Digital Audio Data Input ......................................................................... 70
10.4.1 Parallel Delivery with Parallel Control ........................................................ 71
10.4.2 Parallel Delivery with Serial Control ........................................................... 71
10.5 Digital Audio Output Port ......................................................................................... 72
10.5.1 IEC60958 Output .. ...................... ....................... ...................... ................... 73
11.HARDWARE CONFIGURATION ................................................................................... 74
11.1 Address Checking ................................................................................................... 74
11.2 Input Data Hardware Configuration ........... ............. ............. ............. ............. ......... 74
11.2.1 Input Configuration Considerations ......................................................... 77
11.3 Output Data Hardware Configuration ...................................................................... 78
11.3.1 Output Configuration Considerations ........................................................ 80
11.4 Creating Hardware Configuration Messages .......................................................... 80
12.PIN DESCRIPTIONS ....................................................................................................... 82
13.ORDERING INFORMATION ........................................................................................... 87
14.PACKAGE DIMENSIONS .............................................................................................. 88
15.DOCUMENT REVISIONS ............................................................................................ 89
LIST OF FIGURES
Figure 1. RESET Timing ........................................................................................................ 9
Figure 2. CLKIN with CLKSEL = VSS = PLL Enable ............................................................. 9
Figure 3. Intel® Parallel Host Mode Read Cycle .................................................................. 11
Figure 4. Intel® Parallel Host Mode Write Cycle .................................................................. 11
Figure 5. Motorola® Parallel Host Mode Read Cycle ........................................................... 13
Figure 6. Motorola® Parallel Host Mode Write Cycle ........................................................... 13
Figure 7. SPI Control Port Timing ........................................................................................ 15
Figure 8. I2C® Control Port Timing ...................................................................................... 17
Figure 9. Digital Audio Input Data, Master and Slave Clock Timing ......... ... ... ... .... ... ... ... ... ... 19
Figure 10. Serial Compressed Data Timing ............ .... ... ... ... .... ... ... ... ... .... ... ................ ... ... ... 20
Figure 11. Parallel Data Timing (when not in a parallel control mode) ..... ............. ............ ... 21
Figure 12. Digital Audio Output Data, Input and Output Clock Timing ................................. 23
Figure 13. I2C® Control ........................................................................................................ 29
Figure 14. I2C® Control with External Memory ..................................................................... 30
Figure 15. SPI Control .......................................................................................................... 31
Figure 16. SPI Control with External Memory ...................................................................... 32
Figure 17. Intel® Parallel Control Mode ................................................................................ 33
CS49300 Family DSP
4DS339F7
Figure 18. Motorola® Parallel Control Mode ... ... ... ... .... ... ................ ... ... .... ... ... ... .... ... ... ... ......34
Figure 19. SPI Write Flow Diagram ......................................................................................37
Figure 20. SPI Read Flow Diagram ......................................................................................37
Figure 21. SPI Timing ...........................................................................................................39
Figure 22. I2C® Write Flow Diagram ....................................................................................40
Figure 23. I2C® Read Flow Diagram ...................................................................................41
Figure 24. I2C® Timing ........................................................................................................42
Figure 24. Intel Mode, One-Byte Write Flow Diagram ..........................................................46
Figure 25. Intel Mode, One-Byte Read Flow Diagram ..........................................................47
Figure 26. Motorola Mode, One-Byt e Writ e Flow Diagram ............. ... ... .... ... ... ... .... ... ... ... ... ...48
Figure 27. Motorola Mode, One-Byte Read Flow Diagram ..................................................48
Figure 28. Typical Parallel Host Mode Control Write Sequence Flow Diagram ...................49
Figure 29. Typical Parallel Host Mode Control Read Sequence Flow Diagram ...................50
Figure 30. External Memory Interface ..................................................................................53
Figure 31. External Memory Read (16-bit address) .............................................................53
Figure 32. External Memory Write (16-bit address) .............. .................... ................... .........53
Figure 33. Typical Serial Boot and Download Procedure .....................................................55
Figure 34. Typical Parallel Boot and Download Procedure ......... ... ... ... .... ... ... ... .... ... ... ... ... ...56
Figure 35. Autoboot Timing Diagram .... ................ ................ ................ ................. ...............58
Figure 36. Autoboot Sequence .............................................................................................59
Figure 37. Autoboot INTREQ Behavior ................................................................................60
Figure 38. Fast Autoboot Sequence Using GFABT Codes ..................................................62
Figure 39. Performing a Reset .............................................................................................64
Figure 40. Non-Paged Memory ............................................................................................65
Figure 41. Example Contents of a Paged 32 Kilobytes External Memory ............................66
Figure 42. CDB49300-MEMA.0 Daughter Card for the CDB4923/30-REV-A.0 .... ... ...... ... ...67
Figure 43. I2S Format ...........................................................................................................69
Figure 44. Left Justified Format (Rising Edge Valid SCLK) ..................................................69
Figure 45. Multichannel Format ............................................................................................70
LIST OF TABLES
Table 1. PLL Filter Component Values................................................................................. 28
Table 2. Host Modes ................ ................ ... .... ... ... ... .... ... ................ ... ... .... ... ... ... ................ .. 36
Table 3. SPI Communication Signals................................................................................... 36
Table 4. I2C® Communication Signals................................................................................. 38
Table 5. Parallel Input/Output Registers...... .... ..................................................................... 45
Table 6. Intel Mode Communication Signals........................................................................ 46
Table 7. Motorola Mode Communication Signals................................................................. 47
Table 8. Memory Interface Pins............................................................................................ 51
Table 9. Boot Write Messages ............................................................................................. 54
Table 10. Boot Read Messages............ ... ... .... ... ... ... .... ... ... ... .... ... ... ... ... ................. ... ... ... ... .. 54
Table 11. Reduced Autoboot Times using GFABT8.LD, GFABT6.LD, and GFABT4.LD on a
CS493264-CL Rev. G DSP................................................................................... 61
Table 12. Mem or y Req u ire me n ts for Ex am p le 5. 1, 6. 1 an d 7.1 Channel Syste m s......... ..... 65
Table 13. Digital Audio Input Port.......................... ... .... ... ... ... .... ... ... ... ................ .... ... ... ... ... .. 70
Table 14. Compressed Data Input Port................................................................................ 70
Table 15. Digital Audio Output Port................. ................ ... ... .... ... ... ... ... .... ... ... ... .... ... ... ... ... .. 72
Table 16. MCLK/SCLK Master Mode Ratios........................................................................ 72
Table 17. Output Channel Mapping.......... ... .... ... ................ ... .... ... ... ... ... .... ... ... ... .... ... ... ... ..... 72
Table 18. Inpu t Dat a Type Configuration
(Input Parameter A) .............................................................................................. 75
Table 19. Inpu t Dat a Fo rm a t C on fig ur a tion
(Input Parameter B) .............................................................................................. 75
CS49300 Family DSP
DS339F7 5
Table 20. Input SCLK Polarity Configuration
(Input Parameter C).............................................................................................. 77
Table 21. Input FIF O Setu p Co nf igu ra tion
(Input Parameter D).............................................................................................. 77
Table 22. Output Clock Configuration
(Parameter A)....................................................................................................... 78
Table 23. Output Data Format Configuration
(Parameter B)....................................................................................................... 78
Table 24. Output MCLK Configuration
(Parameter C)....................................................................................................... 79
Table 25. Output SCLK Configuration
(Parameter D)....................................................................................................... 79
Table 26. Output SCLK Polarity Configuration
(Parameter E)....................................................................................................... 79
Table 27. Example Values to be Sent to CS493XX After Download or Soft Reset.............. 81
CS49300 Family DSP
6DS339F7
Contacting Cirrus Logic Support
For a complete listing of Direct Sales, Distributor, and Sales Representative contacts, visit the Cirrus Logic web site at:
http://www.cirrus.com
IMPORTANT NOTICE
Cirrus Logic, Inc. and its subsidiaries ("Cirrus") believe that the information contained in this document is accurate and reliable. However, th e information
is subject to change without notice and is provided "AS IS" without warranty of any kind (express or implied). Customers are advised to obtain the la test
version of r elev an t inf or mat ion t o ver i fy , be f ore p l acin g or ders, th at i nfo rma tio n b ei ng r el ied on i s cu rr en t an d co mplet e. Al l prod uct s are so ld s ubje ct to
the terms and condit ions of sale supplied at the time of order acknowledgment, including those pertaining to warra nty, indemnification, and li mitation of
liability. No responsibility is assumed by Cirrus for the use of this information, including use of this information as the basis for manufacture or sale of any
items, or for infri ngement of patents or ot her rights of third part ies. This document is the pr operty of Cirrus and by fur nishing this information, Cirrus grants
no license, ex press or implied under any pate nts, mask work rights, copyri ghts, trademarks, trad e secrets or other intellec tual property rights. Cirrus owns
the copyrights associated with the information contained herein and gives consent for copies to be made of the information only for use within your
organizati on with respect to Ci rrus integrated circ uits or other prod ucts of Cirrus. This consent does not exten d to other copying such as copying for
general distribution , advertising or promoti onal purpose s , or for creating any work for resale.
CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR
SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE ("CRITICAL APPLICATIONS"). CIRRUS PRODUCTS ARE NOT DESIGNED, AUTHORIZED
OR WARRANTED FOR USE IN AIRCRAFT SYSTEMS, MILITARY APPLICATIONS, PRODUCTS SURGICALLY IMPLANTED INTO THE BODY,
AUTOMOTIVE SAFETY OR SECURITY DEVICES, LIF E SUPPORT PRODUCTS OR OTHER CRIT ICAL APPLICATIONS. INC LUSION OF CIRRUS
PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUST OMER'S RISK AND CIRRU S DISCLAIM S AND MAKES NO
WARRANTY, EXPRESS, STATUTORY OR IMPLIED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
PARTICULAR PURPOSE, WITH REGARD TO ANY CIRRUS PRODUCT THAT IS USED IN SUCH A MANNER. IF THE CUSTOMER OR
CUSTOMER'S CUSTOMER USES OR PERMITS THE USE OF CIRRUS PRODUCTS IN CRITICAL APPLICATIONS, CUSTOMER AGREES, BY
SUCH USE, TO FULLY INDEMNIFY CIRRUS, ITS OFFICERS, DIRECTORS, EMPLOYEES, DISTRIBUTORS AND OTHER AGENTS FROM ANY AND
ALL LIABILITY, INCL UDING ATTORNEYS' FEES AND COSTS, THAT MAY RESULT FROM OR ARIS E IN CONNECTION WITH THESE USES.
Cirrus Logic, Cirrus, and the Cirrus Logic logo designs are trademarks of Cirrus Logic, Inc. All other brand and product names in this document may be
trademarks or service marks of their respective owners.
Dolby, Dolby Digital, AC-3, Pro Logic, Dolby Surround, Surround EX, Virtual Dolby Digital, MLP, MLP Lossless, AAC, the "AAC" logo, the "Dolby Digital"
logo, "Dolby Digital with Pro Logic II" logo, "Dolby" and the double-"D" symbol are trademarks or registered trademarks of Dolby Laboratories, Inc. Supply
of an imple menta tion o f Dol by Te chnolog y doe s not conve y a l icen se nor i mply a ri ght un der a ny pa tent, or a ny othe r in dustri al or Intellectual Property
Right of Dolby Laboratories, to use the Implementation in any finished end-user or ready-to-use final product. It is hereby notified that a lic ense for s uch
use is required from Dolby Laboratori es.
DTS, DTS Digital Surround, DTS-ES Extended Surround, DTS Neo:6, DTS Virtual 5.1, the "DTS", "DTS-ES", "DTS Virtual 5.1" logos are trademarks or
registered trademarks of the Digital Theater Systems, Inc. It is hereby notified that a third-party license from DTS is necessary to distribute software of
DTS in any finished end-user or ready-to-use final prod uct.
THX® Technology by Lucasarts Entertainment Company Corporation. THX is a registered trademark of Lucasarts Entertainment Company Corporation.
Home THX is a registered trademark of Lucasfilm Ltd.
, HDCD®, High Definition Compatible Digital® and Pacific Microsonics™In c. are either registered trademarks or trademarks of
Microsoft Corporation in the United States and/or other countries. HDCD technology cannot be used or distributed without a license
from Microsoft Licensing, Inc.
The "MPEG Logo" is a registered trademark of Philips Electronics N.V.
In regards to the MP3 capable functionality of t he CS49300 Family D SP (via downloading of mp3_493xxx_vv.ld and mp3e_493xxx_vv. ld application
codes) the fol lowing statements are applicable: "MPEG Layer-3 (MP3 ) audio coding technol ogy licensed from Fraunho fer Gesellschaft and Thomson
multimedia. Supply of this product only conveys a lic ense for perso nal, private and non-commercial use."
SRS, Circle Surround, and TruSurround are registered trademarks of SRS Labs, Inc. The CIRCLE SURROUND TECHNOLOGY rights incorporated in
the Cirrus Logic chip are owned by SRS Labs, Inc. and by Valence Technology Ltd., and lic ensed to Cirr us Logic, Inc.
Users of any Cirrus Logic chip containing enabled CIRCLE SURROUND TECHNOLOGY® (i.e., CIRCLE SURROUND® LICENSEES) must first sign a
license to purchase p roduction q uantities for consume r electron ics applic ations whi ch may be gr anted upon su bmission o f a prepr oduction s ample to,
and the satisfactory passing of performance verification tests performed by SRS Labs, Inc., or Valence Technology Ltd. E-mail requests for performance
specifica tions and testing ra te schedule may be mad e to cslicense@sr slabs.com. SRS Labs , Inc. and Valence Technology, Ltd. , reserve the right to
decline a use license for any submission that does not pass perfor mance specifi cations or is not in the consumer electronics classification.
All equipment ma nufactured using any C irrus L ogic chip co ntaining enable d CIRCLE SURROUND® TECHNOLOGY mu st carry the Circle Su rround®
logo on the f ront p an el i n a ma nn er ap prov ed in wri tin g b y S RS Lab s, I nc ., or Va lenc e T ec hno logy L td. I f th e Ci rcle Su rr ound ® logo is printed in users
manuals, service manuals or advertisements, it must appear in a form approved in writing by SRS Labs, Inc., or Valence Technology, Ltd. The rear panel
of Circle Surround® products, users manuals, service manuals, and all advertising must all carry the legends as described in LICENSOR'S most current
version of the CIRCLE SURROUND Trademark Usage Manual.
Intel is a registered trademark of Intel Corporation.
Motorola and SPI are registered tra d ema rk s of Moto ro la, Inc.
Harman VMAx and LOGIC7 are registered trademarks of Harman International Industries, Inc.
I2C is a registered trademark of Philips Semiconductor.
CS49300 Family DSP
DS339F7 7
1. CHARACTERISTICS AND SPECIFICATIONS
(All Min/Max characteristics and specifications are guaranteed over the Specified Operating Conditions. Typical
performance characteristics and specifications are derived from measurements taken at nominal supply voltages
and TA = 25°C.)
1.1. Specified Operating Conditions
(AGND, DGND = 0 V; all voltages with respect to 0 V)
1.2. Absolute Maximum Ratings
(AGND, DGND = 0 V; all voltages with respect to 0 V)
CAUTION: Operation at or beyond these limits may result in permanent damage to the device. Normal operation
is not guaranteed at these extremes.
1.3. Thermal Data
(VA, VD[3:1] = 2.5 V ±5%; measurements performed under operating con ditions)
Notes: 1. Two-layer board is specified as a 76 mm X 114 mm, 1.6 mm thick FR-4 material with 1-oz copper
covering 20 % of the top & bottom layers.
2. Four-layer board is specified as a 76 mm X 114 mm, 1.6 mm thick FR-4 material with 1-oz copper
covering 20 % of the top & bottom layers and 0.5-oz copper covering 90 % of the internal power plane
& ground plane laye rs.
3. To calculate the die temperature for a given power dissipation
Tj = Ambient Temperature + [ (Power Dissipa tion in Watts) * θja ]
4. To calculate the case temperature for a given power dissipation
Tc = Tj - [ (Power Dissipation in Watts) * ψjt ]
Parameter Symbol Min Typ Max Unit
DC power supplies: Positive digital
Positive analog
||VA| – |VD||
VD
VA 2.37
2.37
-
2.5
2.5
-
2.63
2.63
0.3
V
V
V
Ambient operating temperature TA0-70°C
Parameter Symbol Min Max Unit
DC power supplies: Positive digital
Positive analog
||VA| – |VD||
VD
VA –0.3
–0.3
-
2.75
2.75
0.3
V
V
V
Input current, any pin except supplies Iin -±10 mA
Digital input voltage VIND –0.3 3.63 V
Storage temperature Tstg –65 150 °C
Parameter Symbol Min Typ Max Unit
Thermal Resistance (Junction to Ambient)
Two-layer Board (Note 1)
Four-layer Board (Note 2) θja -
--
-44.5
36.3 °C / Watt
Thermal Resistance (Junction to Top of Package)
Two-layer Board (Note 1)
Four-layer Board (Note 2) ψjt -
--
-2.0
3.8 °C / Watt
CS49300 Family DSP
8DS339F7
1.4. Digital D.C. Characteristics
(VA, VD[3:1] = 2.5 V ±5%; measurements performed under static conditions.)
1.5. Power Supply Characteristics
(VA, VD[3:1] = 2.5 V ±5%; measurements performed under operating con ditions)
Parameter Symbol Min Typ Max Unit
High-level input voltage VIH 2.0 - - V
Low-level input voltage VIL --0.8V
High-level output voltage at IO = –2.0 mA VOH VD ×0.9 - - V
Low-level output voltage at IO = 2.0 mA VOL --VD×0.11 V
Input leakage current Iin --1.0µA
Parameter Symbol Min Typ Max Unit
Power supply current: Digital operating: VD[3:1]
Analog operating: VA -
-200
1.7 310
4mA
mA
CS49300 Family DSP
DS339F7 9
1.6. Switching Characteristics — RESET
(VA, VD[3:1] = 2.5 V ±5%; Inputs: Logic 0 = DGND, Logic 1 = VD, CL = 20 p F)
Notes: 5. The minimum RESET pulse listed above is valid only when using the r ecommen ded p ull-up/pu ll-d own
resistors on the RD, WR, PSEL and ABOOT mode pins. For Rev. D a nd olde r p arts, pu ll-u p/pull-do wn
resistors may be 4.7 k or 3.3 k. For Rev. E and newer parts, pull-up/pull-down resistors must be 3.3 k.
6. This specification is characterized but not production tested.
1.7. Switching Characteristics — CLKIN
(VA, VD[3:1] = 2.5 V ±5%; Inputs: Logic 0 = DGND, Logic 1 = VD, CL = 20 pF, PLL Enabled)
Parameter Symbol Min Max Unit
RESET minimum pulse width low (-CL) (Note 5) Trstl 100 - µs
RESET minimum pulse width low (-IL) (Note 5) Trstl 530 - µs
All bidirectional pins high-Z after RESET low (Note 6) Trst2z -100ns
Configuration bits setup before RESET high Trstsu 50 - ns
Configuration bits hold after RESET high Trsthld 15 - ns
RESET
T
rst2z
T
rstl
T
rstsu
T
rsthld
RD, WR,
PSEL, ABOOT
All Bidirectional
Pins
Figure 1. RESET Timing
Parameter Symbol Min Max Unit
CLKIN period for internal DSP clock mode Tclki 35 3800 ns
CLKIN high time for internal DSP clock mode Tclkih 14 - ns
CLKIN low time for internal DSP clock mode Tclkil 14 - ns
CLKIN
T
clkih
T
clkil
T
clki
Figure 2. CLKIN with CLKSEL = VSS = PLL Enable
CS49300 Family DSP
10 DS339F7
1.8. Sw itching Characteristics — Intel® Host Mode
(VA, VD[3:1] = 2.5 V ±5%; Inputs: Logic 0 = DGND, Logic 1 = VD, CL = 20 p F)
Notes: 1. Certain timing parameters are normalized to the DSP clock, DCLKP, in nanoseconds. DCLKP =
1/DCLK. The DSP clock can be defined as follows:
External CLKIN Mode:
DCLK == CLKIN/4 before and d uring boot
DCLK == CLKIN after boot
Internal Clock Mode:
DCLK == 10MHz before and du ring boot, i.e. DCLKP == 100ns
DCLK == 65 MHz after boot, i.e. DCLKP == 15.4ns
It should be noted that DCLK for the internal clock mode is application specific. The application code
users guide should be checked to confirm DCLK for the particular application.
2. This specification is characterized but no t production tested. A 470 ohm pull-up resistor was used for
characterization to minimize the effects of external bus capacitance .
3. See Tidd from Intel Host Mode in Table 6 on page 46
Parameter Symbol Min Max Unit
Address setup before CS and RD low or CS and WR low Tias 5-ns
Address hold time after CS and RD low or CS and WR low Tiah 5-ns
Delay between RD then CS low or CS then RD low Ticdr 0∞ns
Data valid after CS and RD low (Note 3) Tidd -21ns
CS and RD low for read (Note 1) Tirpw DCLKP + 10 - ns
Data hold time af ter CS or RD high Tidhr 5-ns
Data high-Z after CS or RD high (Note 2) Tidis -22ns
CS or RD high to CS and RD low for next read (Note 1) Tird 2*DCLKP + 10 - ns
CS or RD high to CS and WR low for next write (Note 1) Tirdtw 2*DCLKP + 10 - ns
Delay between WR then CS low or CS then WR low Ticdw 0∞ns
Data setup before CS or WR high Tidsu 20 - ns
CS and WR low for write (Note 1) Tiwpw DCLKP + 10 - ns
Data hold af ter CS or WR high Tidhw 5-ns
CS or WR high to CS and RD low for next read (Note 1) Tiwtrd 2*DCLKP + 10 - ns
CS or WR high to CS and WR low for next write (Note 1) Tiwd 2*DCLKP + 10 - ns
CS49300 Family DSP
12 DS339F7
1.9. Switching Characteristics — Motorola® Host Mode
(VA, VD[3:1] = 2.5 V ±5%; Inputs: Logic 0 = DGND, Logic 1 = VD, CL = 20 p F)
Notes: 1. Certain timing parameters are normalized to the DSP clock, DCLKP, in nanoseconds. DCLKP =
1/DCLK. The DSP clock can be defined as follows:
External CLKIN Mode:
DCLK == CLKIN/4 before and d uring boot
DCLK == CLKIN after boot
Internal Clock Mode:
DCLK == 10MHz before and du ring boot, i.e. DCLKP == 100ns
DCLK == 65 MHz after boot, i.e. DCLKP == 15.4ns
It should be noted that DCLK for the internal clock mode is application specific. The application code
users guide should be checked to confirm DCLK for the particular application.
2. This specification is characterized but no t production tested. A 470 ohm pull-up resistor was used for
characterization to minimize the effects of external bus capacitance .
3. See Tmdd from Motorola Host Mode in Table 7 on page 47
Parameter Symbol Min Max Unit
Address setup before CS and DS low Tmas 5-ns
Address hold time after CS and DS low Tmah 5-ns
Delay between DS then CS low or CS then DS low Tmcdr 0∞ns
Data valid after CS and DS low with R/W high (Note 3) Tmdd -21ns
CS and DS low for read (Note 1) Tmrpw DCLKP + 10 - ns
Data hold time af ter CS or DS high after read Tmdhr 5-ns
Data high-Z after CS or DS high after read (Note 2) Tmdis -22ns
CS or DS high to CS and DS low for next read (Note 1) Tmrd 2*DCLKP + 10 - ns
CS or DS high to CS and DS low for next write (Note 1) Tmrdtw 2*DCLKP + 10 - ns
Delay between DS then CS low or CS then DS low Tmcdw 0∞ns
Data setup before CS or DS high Tmdsu 20 - ns
CS and DS low for write (Note 1) Tmwpw DCLKP + 10 - ns
R/W setup before CS AND DS low Tmrwsu 5-ns
R/W hold time after CS or DS high Tmrwhld 5-ns
Data hold af ter CS or DS high Tmdhw 5-ns
CS or DS high to CS and DS low with R/W high for next read
(Note 1) Tmwtrd 2*DCLKP + 10 - ns
CS or DS high to CS and DS low for next write (Note 1) Tmwd 2*DCLKP + 10 - ns
CS49300 Family DSP
14 DS339F7
1.10. Switching Characteristics — SPI™ Control Port
(VA, VD[3:1] = 2.5 V ±5%; Inputs: Logic 0 = DGND, Logic 1 = VD, CL = 20 pF)
Notes: 1. The specification f sck indicate s the maximum speed of the hardware. The system designer should be
aware that the actual maximum sp ee d of the co mm u nic ation port may be limite d by the so ftware. Th e
relevant application code user’s manual should be consulted for the software speed limitations.
2. Data must be held for sufficient time to bridge the 50 ns transition time of SCCLK.
3. SCDOUT should not be sampled during this time period.
4. INTREQ goes high only if th ere is no data to be read from the DSP at the rising edge of SCCLK for the
second-to-last bit of the last byte of data during a read operation as shown.
5. If INTREQ goes high as indicated in (N ote 4), then INTREQ is guarante ed to remain high until the next
rising edge of SCCLK. If there is more data to be read at this time, INTREQ goes active low again. Treat
this condition as a new read tra nsaction. Raise chip sele ct to end the current read tra nsaction and then
drop it, followed by the 7-bi t address and the R/W bit (set to 1 for a read ) to start a new read transaction.
6. With a 3.3k Ohm pull-up resistor this value is typically 260ns. As this pin is open drain adjusting the pull
up value will affect the rise time.
7. This time is by design and not tested.
Parameter Symbol Min Max Units
SCCLK clock frequency (Note 1) fsck -2000kHz
CS falling to SCCLK rising tcss 20 - ns
Rise time of SCCLK line (Note 7) tr-50ns
Fall time of SCCLK lines (Note 7) tf-50ns
SCCLK low time tscl 150 - ns
SCCLK high time tsch 150 - ns
Setup time SCDIN to SCCLK rising tcdisu 50 - ns
Hold time SCCLK rising to SCDIN (Note 2) tcdih 50 - ns
Transition time from SCCLK to SCDOUT valid (Note 3) tscdov -40ns
Time from SCCLK rising to INTREQ risin g (Note 4) tscrh - 200 ns
Rise time for INTREQ (Note 4) trr - (N ot e 6) ns
Hold time for INTREQ from SCCLK rising (Note 5, 7) tscrl 0-ns
Time from SCCLK falling to CS rising tsccsh 20 - ns
High time between active CS tcsht 200 - ns
Time from CS rising to SCDOUT high-Z (Note 7) tcscdo 20 ns
CS49300 Family DSP
16 DS339F7
1.11. Switching Characteristics — I2C® Control Port
(VA, VD[3:1] = 2.5 V ±5%; Inputs: Logic 0 = DGND, Logic 1 = VD, CL = 20 p F)
Notes:. 1. The specification fscl indicates the maximum speed of the hardware. The system designer should be
aware that the actual maximum sp ee d of the co mm u nic ation port may be limite d by the so ftware. Th e
relevant application code user’s manual should be consulted for the software speed limitations.
2. Data must be held for sufficient time to bridge the 300- ns transition time of SCCLK. This hold time is by
design and not tested.
3. This rise time is shorter than that recommended by the I2C specifications. For more information, see
Section 6.1, “Serial Communication” on page 36.
4. INTREQ goes high only if th ere is no data to be read from the DSP at the rising edge of SCCLK for the
last data bit of the last byte of data during a read operation as shown.
5. If INTREQ goes high as indicated in Note 8, then INTREQ is guaranteed to remain high until the next
rising edge of SCCLK. If there is more data to be read at this time, INTREQ goes active low again. Treat
this condition as a new read transaction. Send a new start condition followed by the 7-bit address and
the R/W bit (set to 1 for a read). This time is by design and is not tested.
6. With a 3.3k Ohm pull-up resistor this value is typically 260ns. As this pin is open drain adjusting the pull
up value will affect the rise time.
7. This time is by design and not tested.
Parameter Symbol Min Max Units
SCCLK clock frequency (Note 1) fscl 400 kHz
Bus free time betwee n tr an sm issio ns t buf 4.7 µs
Start-conditio n hold time (prior to first clock pulse) thdst 4.0 µs
Clock low time tlow 1.2 µs
Clock high time thigh 1.0 µs
SCDIO setup time to SCCLK rising tsud 250 ns
SCDIO hold time from SCCLK falling (Note 2) thdd 0µs
Rise time of SCCLK (Note 3), (Note 7) tr50 ns
Fall time of SCCLK (Note 7) tf300 ns
Time from SCCLK falling to CS493XX ACK tsca 40 ns
Time from SCCLK falling to SCDIO valid during read operation tscsdv 40 ns
Time from SCCLK rising to INTREQ risin g (Note 4) tscrh 200 ns
Hold time for INTREQ from SCCLK rising (Note 5) tscrl 0ns
Rise time for INTREQ (Note 6) trr ** ns
Setup time for stop condition tsusp 4.7 µs
CS49300 Family DSP
18 DS339F7
1.12. Switching Characteristics — Digital Audio Input
(VA, VD[3:1] = 2.5 V ±5%; Inputs: Logic 0 = DGND, Logic 1 = VD, CL = 20 p F)
Notes: 1. Master mode timing specifications are characterized, not production tested.
2. Master mode is defined as the CS493XX driving LRCLKN1(2) and SCLKN1(2). Master or Slave m ode
can be programmed.
3. This timing parameter is defined from the non-active edge of SCLKN1(2). The active edge of
SCLKN1(2) is the point at which the data is valid.
4. This timing parameter is defined from the active edge of SCLKN1(2). The active edge of SCLKN1(2 ) is
the point at which the data is valid.
5. Slave mode is defined as SCLKN1(2) and LRCLKN1(2) being driven by an external source.
Parameter Symbol Min Max Unit
SCLKN1(2) period for both Master and Slave mode (Note 1) Tsclki 40 - ns
SCLKN1(2) duty cycle for Master and Slave mode (Note 1) 45 55 %
Master Mode (Note 1, 2)
LRCLKN1(2) delay after SCLKN1(2) transition (Note 3) Tlrds -10ns
SDATAN1(2) setup to SCLKN1(2) transition (Note 4) Tsdsum 10 - ns
SDATAN1(2 ) hold tim e after SCLKN1 ( 2) transit i on (Note 4) Tsdhm 5-ns
Slave Mode (Note 5)
Time from active edge of SCLKN1(2) to LRCLKN1(2) transition Tstlr 10 - ns
Time from LRCLKN1(2) transition to SCLKN1(2) active edge Tlrts 10 - ns
SDATAN1(2) setup to SCLKN1(2) transition (Note 4) Tsdsus 5-ns
SDATAN1(2 ) hold tim e after SCLKN1 ( 2) transit i on (Note 4) Tsdhs 5-ns
CS49300 Family DSP
20 DS339F7
1.13. Switching Characteristics — Serial Bursty Data Input
(VA, VD[3:1] = 2.5 V ±5%; Inputs: Logic 0 = DGND, Logic 1 = VD, CL = 20 p F)
Notes: 1. CMPREQ signal is asynchronous to CLKIN and can change at any time relative to CLKIN.
Parameter Symbol Min Max Unit
Serial compressed data clock CMPCLK period Tcmpclk -27MHz
CMPDAT setup before CMPCLK high Tcmpsu 5-ns
CMPDAT hold after CMPCLK high Tcmphld 3-ns
Delay from falling edge of CMPREQ to CMPCLK rising edge Treqclk 0-ns
Tcmpsu Tcmpclk
Tcmphld
CMPREQ
CMPCLK
CMPDAT
Treqclk
Figure 10. Serial Compressed Data Timing
CS49300 Family DSP
DS339F7 21
1.14. Switching Characteristics — Parallel Data Input
(VA, VD[3:1] = 2.5 V ±5%; Inputs: Logic 0 = DGND, Logic 1 = VD, CL = 20 p F)
Notes: 1. CMPREQ signal is asynchronous to CLKIN and can change at any time relative to CLKIN.
2. Certain timing parameters are normalized to the DSP clock, DCLK, in nanoseconds. The DSP clock can
be defined as follows:
External CLKIN Mode:
DCLK == CLKIN/4 before and d uring boot
DCLK == CLKIN after boot
Internal Clock Mode:
DCLK == 10MHz before and during boot, i.e. DCLK == 100ns
DCLK == 65 MHz after boot, i.e. DCLK == 15.4ns
It should be noted that DCLK for the internal clock mode is application specific. The application code
users guide should be checked to confirm DCLK for the particular application.
Parameter Symbol Min Max Unit
CMPCLK Period Tcmpclk 4*DCLK + 10 - ns
DATA[7:0] setup before CMPCLK high Tcmpsu 10 - ns
DATA[7:0] hold after CMPCLK high Tcmphld 10 - ns
Delay from falling edge of CMPREQ to CMPCLK rising edge Treqclk 0-ns
Tcmpsu Tcmpclk
Tcmphld
CMPREQ
CMPCLK
DATA[7:0]
Treqclk
Figure 11. Parallel Data Timing (when not in a parallel control mode )
CS49300 Family DSP
22 DS339F7
1.15. Switching Characteristics — Digital Audio Output
(VA, VD[3:1] = 2.5 V ±5%; Inputs: Logic 0 = DGND, Logic 1 = VD, CL = 20 p F)
Notes: 1. MCLK can be an input or an output. These specifications apply for both cases.
2. Master mode timing specifications are characterized, not production tested.
3. Master mode is defin ed as the CS493XX driving bo th SCLK and LRCLK. When MCLK is an input, it is
divided to produce SCLK and LRCLK.
4. This timing parameter is defined from the non-active edge of SCLK. The active edge of SCLK is the
point at which the data is valid.
5. Slave mode is defined as SCLK and LRCLK being driven by an external so urce.
6. This specification is characterized, not production tested.
Parameter Symbol Min Max Unit
MCLK period (Note 1) Tmclk 40 - ns
MCLK duty cycle (Note 1) 40 60 %
SCLK period for Master or Slave mode (Note 2) Tsclk 40 - ns
SCLK duty cycle for Master or Slave mode (Note 2) 45 55 %
Master Mode (Note 2, 3)
SCLK delay from MCLK rising edge, MCLK as an input Tsdmi 15 ns
SCLK delay from MCLK rising edge, MCLK as an output Tsdmo –5 10 ns
LRCLK delay from SCLK tra n sition (Note 4) T lrds 10 ns
AUDATA2–0 delay from SCLK transition (Note 4) Tadsm 10 ns
Slave Mode (Note 5)
Time from active edge of SCLKN1(2) to LRCLKN1(2) transition Tstlr 10 - ns
Time from LRCLKN1(2) transition to SCLKN1(2) active edge Tlrts 10 - ns
AUDATA2–0 delay from SCLK transition (Note 4, 6) Tadss 15 ns
CS49300 Family DSP
24 DS339F7
2. FAMILY OVERVIEW
The CS49300 family contains system on a chip
solutions for multichannel audio decompression
and digital signal processing. The CS49300 family
is split into 4 sub-families targeted at the DVD,
broadcast and audio/video receiver (AVR), and
effects and post processing markets.
This document focuses on the electrical features
and characteristics of these parts. Different
features are described from a hardware design
perspective. It should be understood that not all of
the features portrayed in this document are
supported by all of the versions of application code
available. The application code user’s guides
should be consulted to confirm which hardware
features are supported by the software.
The parts use a combination of internal ROM and
RAM. Depending on the application being used, a
download of application software may be required
each time the part is powered up. This document
uses “download” and “code load” interchang eably.
These terms should be in terpreted as meaning the
transfer of application code into the internal
memory of the part from either an external
microcontroller or through the auto boot procedure.
2.1. CS493XX Document Strategy
The documents described below are integral in
defining the functionality and usage of the
CS39300 family of DSPs.
1) CS49300 Datasheet (DS339)
2) CS49300 Errata - (ER339) - This document
contain updates/corrections/exceptions to the
datasheet.
3) Application Note (AN162) - This document
contains firmware usage information for Broadcast
Systems. It serves mainly to assist the
microcontroller programmer but may also be highly
useful to the system designer.
4) Application Note (AN163) - This document
contains firmware usage information for Outboard
Decoder Systems - e.g. AVR. It serves mainly to
assist the microcontroller programmer but may
also be highly useful to the system designer.
Note: Please also contact your local Cirrus
Logic FAE to obtain ot he r re lev an t doc ume n ts
of new technology and also latest versions of
the above men tio ne d do cu m en ts.
2.2. Multichannel Decoder Family of
Parts
CS49300 - DVD Audio Decoder. The CS49300
device is targeted at audio decoding in the DVD via
ES or PES in a serial or parallel bursty fashion for
MLP or for DVD Audio Pack Layer Support. (All the
other decoding/processing algorithms listed below
require delivery of PCM or IEC61937-packed
compressed data via I2S or LJ formatted digital
audio to the CS49300). Specifically the CS49300
will support all of the following
decoding/processing standards:
• Meridian Lossless Packing™ (MLP™)* (for ES
and PES data delivery only)
• DVD Audio Pack Layer Support* (for ES and
PES data delivery only)
• Dolby Digital™ (AC-3™) with
Dolby Pro Logic™
• Dolby Digital™ with Dolby Pro Logic™ plus
Cirrus Extra Surround™
• Dolby Digital™ with Dolby Pro Logic II™
• Dolby Digital™ with Dolby Pro Logic II™ plus
Cirrus Extra Surround™
• Virtual Dolby Digital™
• MPEG-2, Advanced Audio Coding Algorithm
(AAC)
• MPEG Multichannel
• MPEG Multichannel with Dolby Pro Logic II™
• MPEG Multichannel plus Cirrus Extra
Surround™
• MPEG-1, Layer 3 (MP3)
• DTS Digital Surround™
• DTS Digital Surround™ with
Dolby Pro Logic II™
• DTS Digital Surround™ plus Cirrus Extra
Surround™
• DTS-ES Extended Surround™ (DTS-ES
Discrete 6.1 & Matrix 6.1)
• DTS Neo:6™
•LOGIC5
® (5.1 Channel, Max Fs=48kHz and
LOGIC7® (7.1 Channel, Max Fs=96kHz)
• VMAx VirtualTheater® (Virtual Dolby Digital)
• SRS TruSurround™ (Virtual Dolby Digital and
CS49300 Family DSP
DS339F7 25
DTS Virtual 5.1™ Versions)
• SRS Circle Surround™ I/II
• HDCD®
• Cirrus P.D.F. (Dolby Pro Logic 2Fs Decoder
and PCM Upsampler)
• Cirrus PL2_2FS (Dolby Pro Logic II 2Fs
Decoder and PCM Upsampler)
Please refer to the CS4932x/CS49330 Part Matrix
vs. Code Matrix (PDF) document available from
the CS49300 Web Site Page for the latest listing of
audio decoding/processing algorithms. The part
will also support PES layer decode for audio/video
synchronization and DVD Audio Pack layer
support. The CS49300 will support all of the above
decoding and PCM processing standards.
CS4931X - Broadcast Sub-family. Th e CS4931X
sub-family is targeted at audio decoding in the
broadcast markets in systems such as digital TV,
HDTV, set-top boxes and digital audio broadcast
units (digital radios). Specifically the CS4931X
sub-family will support the following decode
standards:
• Dolby Digital™ (AC-3™) with Dolby Pro Logic™
• MPEG-2, Advanced Audio Coding Algorithm
(AAC)
• MPEG-1, Layers 1, 2 Stereo
• MPEG-1, Layers 3 (MP3) Stereo
• MPEG-2, Layer 2 Stereo
• MPEG-2, Layer 3 (MP3) Stereo
The part will also support PES layer decode for
audio/video synchronization. The CS49310 will
support all of the above decode standards while
other parts in the CS4931X sub-family will decode
subsets of the above audio decoding standards.
CS4932X - Audio/Video Receiver (AVR) Sub-
family. The CS4932X sub-family is targeted at
audio decoding in the audio/video receiver
markets. Typical applications will include
amplifiers with integrated decoding capability,
outboard decoder pre-amplifiers, car radios and
any system where the compressed audio is
received in an IEC61937 format. Specifically the
CS4932X sub-family will support the following
decode standards:
• Dolby Digital™ (AC-3™) with
Dolby Pro Logic™
• Dolby Digital™ with Dolby Pro Logic™ plus
Cirrus Extra Surround™
• Dolby Digital™ with Dolby Pro Logic II™
• Dolby Digital™ with Dolby Pro Logic II™ plus
Cirrus Extra Surround™
• Virtual Dolby Digital™
• MPEG-2, Advanced Audio Coding Algorithm
(AAC)
• MPEG Multichannel
• MPEG Multichannel with Dolby Pro Logic II™
• MPEG Multichannel plus Cirrus Extra
Surround™
• MPEG-1, Layer 3 (MP3)
• DTS Digital Surround™
• DTS Digital Surround™ with
Dolby Pro Logic II™
• DTS Digital Surround™ plus Cirrus Extra
Surround™
• DTS-ES Extended Surround™ (DTS-ES
Discrete 6.1 & Matrix 6.1)
• DTS Neo:6™
•LOGIC5
® (5.1 Channel, Max Fs=48kHz and
LOGIC7® (7.1 Channel, Max Fs=96kHz)
• VMAx VirtualTheater® (Virtual Dolby Digital)
• SRS TruSurround™ (Virtual Dolby Digital and
DTS Virtual 5.1™ Versions)
• SRS Circle Surround™ I/II
• HDCD®
• Cirrus P.D.F. (Dolby Pro Logic 2Fs Decoder
and PCM Upsampler)
• Cirrus PL2_2FS (Dolby Pro Logic II 2Fs
Decoder and PCM Upsampler)
The CS49326 will support all of the above decode
standards while other parts in the CS4932X sub-
family will decode subsets of the above audio
decoding standards.
Except for the CS49329 which offers AAC support
this subfamily will offer integrated ROM support for
the AC-3 code, DTS code, Cirrus Original
Surround code and DTS tables. The CS49329 will
require an external download for all applications
but will still support the DTS tables on chip.
CS49330 - General Purpose, Car Audio
Processor, PCM Effects & Multichannel Post-
Processing Device. The CS49330 sub-family is
CS49300 Family DSP
26 DS339F7
targeted at any system that may require post
processing or multichannel effects processing, a
general purpose MPEG Stereo, MPEG
Multichannel, MP3, decoder or PCM effects
processor or mixer, or for car audio applications.
Typical applications will include multichannel
amplifiers, outboard pre-amplifiers, HDTVs and
car radios. Specifically the CS49330 sub-family will
support the following:
• Cirrus Digital Post-Processor, Home THX
Cinema® and THX Surround EX™ 5.1 and 7.1
Channel Post-Processors
• Any general purpose application which only
requires MPEG Multichannel; MPEG-1, Layer
3; MPEG-2, Layer 3*, or C.O.S. PCM Effects
Processor. (MPEG-1, Layer 3 and MPEG-2,
Layer 3 are only available for applications
where serial or parallel bursty elementary
stream data is available. MPEG-1, Layer 3
audio decoding is only available for IEC61937-
packed MP3 data.)
• Multichannel Effects Processing
• General purpose broadcast application that
only requires MPEG-1 Stereo (Layers 1, 2, or
3) and MPEG-2 Stereo (Layers 2 or 3)
• Car Audio Post-Processor
This sub-family will continue to grow as more p ost
processing algorithms are supported.
This data sheet covers the CS49300, CS4931X,
CS4932X and CS49330 sub-families and devices.
These parts are identical from an external
electrical perspective. Internally, each part has
been tailored for supporting different decoding
standards. For this document individual part
numbers have been replaced by CS493XX if the
description applies to the entire CS49300 Family
DSP. If a description only applies to a particular
sub-family, CS49300, CS4931X, CS4932X or
CS49330 will be used. When CS49300, CS4931X,
CS4932X or CS49330 is used, this should be
interpreted as applying to all parts within the
particular sub-family or a particular device.
CS49300 Family DSP
DS339F7 27
3. TYPICAL CONNECTION
DIAGRAMS
Six typical connection diagrams have been
presented to illustrate using the part with the
different communication modes available. They
are as follows:
Figure 13, "I2C® Control" on page 29
Figure 14, "I2C® Control with External Memory" on
page 30
Figure 15, "SPI Control" on page 31
Figure 16, "SPI Control with External Memory" on
page 32
Figure 17, "Intel® Parallel Control Mode" on page
33
Figure 18, "Motorola® Parallel Control Mode" on
page 34
The following should be noted when viewing the
typical connection diagrams:
The pins are grouped functionally in each of the
typical connection diagrams. Please be aware that
the CS493XX symbol may appear differently in
each diagram.
The external memory interface is only supported
when a serial communication mode has been
chosen.
The typical connection diagrams demonstrate the
PLL being used (CLKSEL is pulled low). To use
CLKIN as the DSP clock, CLKSEL should be
pulled high. The system designer must be aware
that certain software feature s may not be available
if external CLKIN is used as the DSP must run
slower when external CLKIN is used. The system
designer should also be aware of additional duty
cycle requirements when using external CLKIN as
a DSP clock. It is highly suggested that the system
designer use the PLL and pull CLKSEL low.
3.1. Multiplexed Pins
The CS493XX family of digital signal processors
(DSPs) incorporate a large amount of flexibility into
a 44 pin package. Because of the high degree of
integration, many of these pins are internally
multiplexed to serve multiple purpo ses. Some pins
are designed to operate in one mode at power up,
and serve a different purpose when the DSP is
running. Other pins have functionality which can be
controlled by the application running on the DSP.
In order to better explain the behavior of the part,
the pins which are multiplexed have been given
multiple names. Each name is specific to the pin’s
operation in a particular mode.
An example of this would be the use of pin 20 in
one of the serial control modes. During the boot
period of the CS493XX, pin 20 is called ABOOT.
ABOOT is sampled on the rising edge of RESET.
If ABOOT is high the host must download code to
the DSP. If ABOOT is low when sampled, the
CS493XX goes into autoboot mode and loads itself
with code by generating addresses and reading
data on EMAD[7:0]. When the part has been
loaded with code and is running an application,
however, pin 20 is called INTREQ. INTREQ is an
open drain output used to inform the host that the
DSP has an outgoing message which should be
read.
In this document, pins will be referred to by their
functionality. Section 12, “Pin Descriptions” on
page 82 describes each pin of the CS493XX and
lists all of its names. Please refer to this section
when exact pin numbers are in question.
The part has 12 general purpose input and output
(GPIO[11:0]) pins that all have multiple
functionality. While in one of the parallel
communicatio n mod es ( Section 6 .2, “Parallel Host
Communication” on page 44), these pins are used
to implement the parallel host communication
interface. While in one of the serial host modes
these pins are used to implement an external
memory interface. Alternatively while in one of the
serial host modes these pins could be used for
another general purpose if the application code
has been programmed to support the special
purpose. In this document the pins are referenced
by the name corresponding to their particular use.
Sometimes GPIO[11:0], or some subset thereof, is
used when referring to the pin s in a general sense.
3.2. Termination Requirements
The CS493XX incorporates open drain pins which
must be pulled high for proper operation. INTREQ
(pin 20) is always an open drain pin which req uires
a pull-up for proper operation. When in the I2C
serial communication mode, the SCDIO signal (pin
19) is open drain and thus requires a pull-up for
proper operation.
CS49300 Family DSP
28 DS339F7
Due to the internal, multiplexed design of the pins,
certain signals may or may not require termination
depending on the mode being used. If a parallel
host communication mode is not being used,
GPIO[11:0] must be terminated or driven as these
pins will come up as high impedance inputs and
will be prone to oscillation if they are left floating.
The specific termination requirements may vary
since the state of some of the GPIO pins will
determine the communication mode at the rising
edge of reset (please see Section 6, “Control” on
page 36 for more information). For the explicit
termination requirements of each communication
mode please see the typical connection diagrams.
Generally a 4.7k Ohm resistor is recommended for
open drain pins. The communication mode setting
pins (please see Section 6, “Control” on page 36
for more information) should also be terminated
with a 4.7k resistor. A 10k Ohm resistor is sufficient
for the GPIO pins and unused inputs.
3.3. Phase Locked Loop Filter
The internal phase locked loop (PLL) of the
CS493XX requires an external filter for successful
operation. The topology o f this filter is shown in the
typical connection diagrams. The component
values are shown below. Care should be taken
when laying out the filter circuitry to minimize trace
lengths and to avoid any close routing of high
frequency signals. Any noise coupled on to the
filter circuit will be directly coupled into the PLL,
which could affect performance.
Reference Designator Value
C1 2.2uF
C2 220pF
C3 10nF
R1 200k Ohm
Table 1. PLL Filter Component Values
CS49300 Family DSP
DS339F7 29
NOTE: A capacitor pair (1 uF and 0.1 uF) must be supplied for each power pin.
MICROCONTROLLER
I2C INTERFACE
OSCILLATOR
DAC (S)
DIR or
ADC [S]
NOTE: +2.5VA is simply +2.5VD after filterin
g
throu
g
h the ferrite bead. Pin 32 must be referenced to +2.5VA
EMAD_GPIO [8:0]
+2.5 Suppl
y
(+2.5VD)
+2.5VD+2.5VD
+2.5VA
+2.5VA
0.1 uF
+
1 uF 0.1 uF
+
1 uF 0.1 uF
+
1 uF
FERRITE BEAD
+
1 uF 0.1 uF
4.7k
4.7k
3.3k
3.3k
Resistor Pack 10k
33
3.3k
10k
OPT_TX
33
33
10k
10k
+
C1
C2
+
47 uF
R1
C3
CS493XX
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
VD1
DGND1
XMT958
WR__GPIO10
RD__GPIO11
SCDIN
SCCLK
GPIO7
GPIO6
GPIO5
GPIO4
VD2
DGND2
GPIO3
GPIO2
GPIO1
GPIO0
CS
SCDIO
INTREQ
GPIO8
SDATAN
VD3
DGND3
SCLKN
SLRCLKN
CMPDAT
CMPCLK
CMPREQ
CLKIN
CLKSEL
FLT2
FLT1
VA
AGND
RESET
DD
DC
AUDATA2
AUDATA1
AUDATA0
LRCLK
SCLK
MCLK
3.3k
Figure 13. I2C® Control
CS49300 Family DSP
30 DS339F7
NOTE: A capacitor pair (1 uF and 0.1 uF) must be supplied for each power pin.
SYSTEM
MICRO
CONTROLLER
I2C INTERFACE
D[7:0]
Q[7:0]
D[7:0]
Q[7:0]
OCTAL F/FOCTAL F/F
EXTERNAL
ROM
A[7:0]
A[15:8]
D[7:0]
/CE
/OE
DIR or
ADCs
DACs
OSCILLATOR
NOTE: +2.5VA is simply +2.5VD after filtering through the ferrite bead. Pin 32 must be referenced to +2.5VA
EMAD[7:0]
+2.5V Supply (+2.5VD)
+2.5VD+2.5VD
+2.5VA
+2.5VA
0.1 uF
+
1 uF 0.1 uF
+
1 uF 0.1 uF
+
1 uF
10k
FERRITE BEAD
0.1 uF
+
1 uF
10k
33
OPT_TX
33
33
4.7k
R1
C3
4.7k
10k
C2
3.3k
10k
Resistor Pack 10k
3.3k
+
47 uF
CS493XX
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
VD1
DGND1
XMT958
WR__GPIO10
RD__EMOE
SCDIN
SCCLK
EMAD7
EMAD6
EMAD5
EMAD4
VD2
DGND2
EMAD3
EMAD2
EMAD1
EMAD0
CS
SCDIO
INTREQ__ABOOT
EXTMEM
SDATAN
VD3
DGND3
SCLKN
SLRCLKN
CMPDAT
CMPCLK
CMPREQ
CLKIN
CLKSEL
FLT2
FLT1
VA
AGND
RESET
DD
DC
AUDATA2
AUDATA1
AUDATA0
LRCLK
SCLK
MCLK
3.3k
+
C1
3.3k
Figure 14. I2C® Control with External Memory
CS49300 Family DSP
DS339F7 31
NOTE: A capacitor pair (1 uF and 0.1 uF) must be supplied for each power pin.
MICROCONTROLLER
SPI INTERFACE
OSCILLATOR
DACs
DIR or
ADCs
NOTE: +2.5VA is simply +2.5VD after filtering through the ferrite bead. Pin 32 must be referenced to +2.5VA
EMAD_GPIO [8:0]
+2.5V Supply (+2.5VD)
+2.5VD
+2.5VD
+2.5VA
+2.5VA
CS493XX
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
VD1
DGND1
XMT958
WR__GPIO10
RD__GPIO11
SCDIN
SCCLK
GPIO7
GPIO6
GPIO5
GPIO4
VD2
DGND2
GPIO3
GPIO2
GPIO1
GPIO0
CS
SCDOUT
INTREQ
GPIO8
SDATAN
VD3
DGND3
SCLKN
SLRCLKN
CMPDAT
CMPCLK
CMPREQ
CLKIN
CLKSEL
FLT2
FLT1
VA
AGND
RESET
DD
DC
AUDATA2
AUDATA1
AUDATA0
LRCLK
SCLK
MCLK
0.1 uF
+
1 uF 0.1 uF
+
1 uF 0.1 uF
+
1 uF
FERRITE BEAD
0.1 uF
+
1 uF
33
33
OPT_TX
10k
33
4.7k
R1
C3
4.7k
3.3k
C2
3.3k
Resistor Pack 10k
3.3k
+
47 uF
+
C1
3.3k
Figure 15. SPI Control
CS49300 Family DSP
32 DS339F7
NOTE: A capacitor pair (1 uF and 0.1 uF) must be supplied for each power pin.
SYSTEM
MICRO
CONTROLLER
SPI INTERFACE
D[7:0]
Q[7:0]
D[7:0]
Q[7:0]
OCTAL F/FOCTAL F/F
EXTERNAL
ROM
A[7:0]
A[15:8]
D[7:0]
/CE
/OE
DIR or
ADCs
DACs
OSCILLATOR
NOTE: +2.5VA is simply +2.5VD after filtering through the ferrite bead. Pin 32 must be referenced to +2.5VA
EMAD[7:0]
+2.5V Supply (+2.5VD)
+2.5VD+2.5VD
+2.5VA
+2.5VA
0.1 uF
+
1 uF 0.1 uF
+
1 uF 0.1 uF
+
1 uF
FERRITE BEAD
0.1 uF
+
1 uF
33
10k
OPT_TX
33
33
4.7k
R1
C3
4.7k
3.3k
C2
3.3k
10k
Resistor Pack 10k
3.3k
+
47 uF
CS493XX
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
VD1
DGND1
XMT958
WR__GPIO10
RD__EMOE
SCDIN
SCCLK
EMAD7
EMAD6
EMAD5
EMAD4
VD2
DGND2
EMAD3
EMAD2
EMAD1
EMAD0
CS
SCDOUT
INTREQ__ABOOT
EXTMEM
SDATAN
VD3
DGND3
SCLKN
SLRCLKN
CMPDAT
CMPCLK
CMPREQ
CLKIN
CLKSEL
FLT2
FLT1
VA
AGND
RESET
DD
DC
AUDATA2
AUDATA1
AUDATA0
LRCLK
SCLK
MCLK
+
C1
3.3k
Figure 16. SPI Control with External Memory
CS49300 Family DSP
DS339F7 33
NOTE: A capacitor pair (1 uF and 0.1 uF) must be supplied for each power pin.
MICROCONTROLLER
INT INTERFACE
OSCILLATOR
DIR or
ADCs
DACs
NOTE: +2.5VA is simply +2.5VD after filtering through the ferrite bead. Pin 32 must be referenced to +2.5VA
DATA[7:0]
+2.5V Supply (+2.5VD)
+2.5VD
+2.5VD
+2.5VA
+2.5VA
10k
0.1 uF
+
1 uF 0.1 uF
+
1 uF 0.1 uF
+
1 uF 0.1 uF
FERRITE BEAD
+
1 uF
OPT_TX
33
10k
33
33
3.3k
3.3k
4.7k
R1
C3C2
4.7k
CS493XX
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21 22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
VD1
DGND1
XMT958
WR
RD
A1
A0
DATA7
DATA6
DATA5
DATA4
VD2
DGND2
DATA3
DATA2
DATA1
DATA0
CS
PSEL_GPIO9
INTREQ
GPIO8 SDATAN
VD3
DGND3
SCLKN
SLRCLKN
CMPDAT
CMPCLK
CMPREQ
CLKIN
CLKSEL
FLT2
FLT1
VA
AGND
RESET
DD
DC
AUDATA2
AUDATA1
AUDATA0
LRCLK
SCLK
MCLK
Resistor Pack 10k
+
47 uF
+
C1
3.3k
3.3k
Figure 17. Intel® Parallel Control Mode
CS49300 Family DSP
34 DS339F7
NOTE: A capacitor pair (1 uF and 0.1 uF) must be supplied for each power pin.
MICROCONTROLLER
MOT INTERFACE
OSCILLATOR
DIR or
ADCs
DACs
NOTE: +2.5VA is simply +2.5VD after filtering through the ferrite bead. Pin 32 must be referenced to +2.5VA
DATA[7:0]
+2.5V Supply (+2.5VD)
+2.5VD
+2.5VD
+2.5VA
+2.5VA
10k
0.1 uF
+
1 uF 0.1 uF
+
1 uF 0.1 uF
+
1 uF 0.1 uF
+
1 uF
FERRITE BEAD
OPT_TX
33
10k
33
33
3.3k
3.3k
3.3k
4.7k
R1
C3
4.7k
C2
Resistor Pack 10k
+
47 uF
+
C1
CS493XX
1
2
34
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21 22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
VD1
DGND1
XMT958DS__WR
R/W__RD
A1
A0
DATA7
DATA6
DATA5
DATA4
VD2
DGND2
DATA3
DATA2
DATA1
DATA0
CS
PSEL_GPIO9
INTREQ
GPIO8 SDATAN
VD3
DGND3
SCLKN
SLRCLKN
CMPDAT
CMPCLK
CMPREQ
CLKIN
CLKSEL
FLT2
FLT1
VA
AGND
RESET
DD
DC
AUDATA2
AUDATA1
AUDATA0
LRCLK
SCLK
MCLK
3.3k
Figure 18. Motorola® Parallel Control Mode
CS49300 Family DSP
DS339F7 35
4. POWER
The CS493XX requires a 2.5V digital power supply
for the digital logic within the DSP and a 2.5V
analog power supply for the internal PLL. There
are three digital power pins, VD1, VD2 and VD3,
along with three digital grounds, DGND1, DGND2
and DGND3. There is one analog power pin, VA
and one analog ground, AGND. The DSP will
perform at its best when noise has been eliminated
from the power supply. The recommendations
given below for decoupling and power conditioning
of the CS493XX will help to ensure reliable
performance.
4.1. Decoupling
It is good practice to decouple noise from the
power supply by placing capacitors directly
between the power and ground of the CS493XX.
Each pair of power pins (VD1/DGND, VD2/DGND,
VD3/DGND, VA/AGND) should have its own
decoupling capacitors. The recommended
procedure is to place both a 0.1uF and a 1uF
capacitor as close as physically possible to each
power pin. The 0.1uF capacitor should be closest
to the part (typically 5mm or closer).
4.2. Analog Power Conditioning
In order to obtain the best performance from the
CS493XX’s internal PLL, the analog power supply
(VA) must be as clean as possible. A ferrite bead
should be used to filter the 2.5V power supply for
the analog portion of the CS493XX. This power
scheme is shown in the typical connection
diagrams.
4.3. Ground
For two layer applications, care sh ould be taken to
have sufficient ground between the DSP and par ts
in which it will be interfacing (DACs, ADCs, DIR,
microcontrollers, external memory etc). If there is
not sufficient ground, a potential will be seen
between the ground reference of the DSP and the
interface parts and the noise margin will be
significantly reduced potentially causing
communication or data integrity problems.
4.4. Pads
The CS493XX incorporate 3.3V tolerant pads. This
means that while the CS493XX power supplies
require 2.5 volts, 3.3 volt signals can be applied to
the inputs without damaging the part.
5. CLOCKING
The CS493XX clock manager incorporates a
programmable phase locked loop (PLL) clock
synthesizer. The PLL takes an input reference
clock and produces all the internal clocks required
to run the internal DSP and to provide master
mode timing to the audio input/output peripherals.
The clock manager also includes a 33-bit system
time clock (STC) to support audio and video
synchronization.
The PLL can be internally bypassed by conne cting
the CLKSEL pin to VD. This connection
multiplexes the CLKIN pin directly to the DSP
clock. Care should be taken to note the minimum
CLKIN requirements when bypassing the PLL.
The PLL reference clock has three possible
sources that are routed through a multiplexer
controlled by the DSP: SCLKN2, SCLKN1, and
CLKIN. Typically, in audio/video environments like
set-top boxes, the CLKIN pin is connected to
27 MHz. In other scenarios such as an A/V
receiver design, the PLL can be clocked through
the CLKIN pin with even multiples of the desired
sampling rate or with an already available clock
source. Typically a 12.288 MHz CLKIN is used in
this scenario so that the same oscillator can be
used for the DSP and ADC.
The clock manager is controlled by the DSP
application software. The software u ser’s guide for
the application code being used should be
referenced for what CLKIN input frequency is
supported.
CS49300 Family DSP
36 DS339F7
6. CONTROL
Control of the CS493XX can be accomplished
through one of four methods. The CS493XX
supports I2C® and SPI serial communication. In
addition the CS493XX supports both a Motorola
and Intel byte wide parallel host control mode. Only
one of the four communication modes can be
selected for control. The states of the RD, WR, and
PSEL pins are sampled at the rising edge of
RESET to determine the interface type as shown in
Table 2.
Whichever host communication mode is used, host
control of the CS493XX is handled through the
application software running on the DSP.
Configuration and control of the CS493XX decoder
and its peripherals are indirectly executed through
a messaging protocol supported by the
downloaded application code. In other words
successful communication can only be
accomplished by following the low level hardware
communication format and high level messaging
protocol. The specifications of the messaging
protocol can be found in any of the software user’s
guides.
Only the subsection describing the communication
mode being used needs to be read by the system
designer.
6.1. Serial Communication
The CS493XX has a serial control port that
supports both SPI and I2C® forms of
communication.
The following sections will explain each
communication mode in more detail. Flow
diagrams will illustrate read and write cycles.
Timing diagrams will be shown to demonstrate
relative edge positions of signal transitions for read
and write operations.
6.1.1. SPI Communication
SPI communication with the CS493XX is
accomplished with 5 communication lines: chip
select, serial control clock, serial data in, serial
data out and an interrupt request line t o signal that
the DSP has data to transmit to the host. Table 3
shows the mnemonic, pin name, and pin number of
each of these signals on the CS493XX.
6.1.1.1. Writing in SPI
When writing to the device in SPI the same
protocol will be used whether writing a byte, a
message or even an entire executable download
image. The examples shown in this document can
be expanded to fit any write situation. Figure 19,
"SPI Write Flow Diagram" on page 37 shows a
typical write sequence:
The following is a detailed description of an SPI
write sequence with the CS493XX.
1) An SPI transfer is initiated when chip select
(CS) is driven low.
2) This is followed by a 7-bit address and the
read/write bit set low for a write. The address
for the CS493XX defaults to 0000000b. It is
necessary to clock this address in prior to any
transfer in order f or the CS493XX to accept the
write. In other words a byte of 0x00 should be
clocked into the device preceding any write.
The 0x00 byte represents the 7 bit address
0000000b, and the least significant bit set to 0
to designate a write.
3) The host should then clock data into the device
most significant bit first, one byte at a time. The
data byte is transferred to the DSP on the
falling edge of the eighth serial clock. For this
reason, the serial clock should be default low
so that eight transitions from low to high to low
will occur for each byte.
RD
(Pin 5) WR
(Pin 4) PSEL
(Pin 19) Host Interface Mode
1118-bit Motorola®
110 8-bit Intel®
01X Serial I2C®
1 0 X Serial SPI
Table 2. Host Modes
Mnemonic Pin Name Pin Number
Chip Select CS 18
Serial Clock SCCLK 7
Serial Data In SCDIN 6
Serial Data Out SCDOUT 19
Interrupt Request INTREQ 20
Table 3. SPI Communication Signals
CS49300 Family DSP
DS339F7 37
4) When all of the bytes have been transferred,
chip select should be raised to signify an end of
write. Once again it is crucial that the serial
clock transitions from high to low on the last bit
of the last byte before chip se lect is raised, or a
loss of data will occur.
The same write routine could be used to send a
single byte, message or an entire application co de
image. From a hardware perspective, it makes no
difference whether communication is by byte or
multiple bytes of any length as long as the correct
hardware protocol is followed.
6.1.1.2. Reading in SPI
A read operation is necessary when the CS493XX
signals that it has data to be read. The CS493XX
does this by dropping its interrupt request line
(INTREQ) low. When reading from the device in
SPI, the same protocol will be used whether
reading a single byte or multiple bytes. The
examples shown in this document can be
expanded to fit any read situation. Figure 20, "SPI
Read Flow Diagram" on page 37 shows a typical
read sequence:
The following is a detailed description of an SPI
read sequence with the CS493XX.
1) An SPI read transaction is initiated by the
CS493XX dropping INTREQ, signaling that it
has data to be read.
2) The host responds by driving chip select (CS)
low.
3) This is followed by a 7-bit address and the
read/write bit set high for a read. The address
for the CS493XX defaults to 0000000b. It is
necessary to clock this address in prior to any
transfer in order for the CS493XX to
acknowledge the read. In other words a byte of
0x01 should be clocked into the device
preceding any read. The 0x01 byte represents
the 7 bit address 0000000b, and the least
Figure 19. SPI Write Flow Diagram
SPI START: CS (LOW)
WRITE ADDRESS BYTE
SET TO 0 FOR WRITE
SEND DATABYTE
MORE DATA?
CS (HIGH)
WITH MODE BIT
N
Y
Figure 20. SPI Read Flow Diagram
CS (LOW)
WRITE ADDRESS BYTE
SET TO 1 FOR READ
READ DATA BYTE
INTREQ STILL LOW?
CS (HIGH)
WITH MODE BIT
NO
YES
INTREQ LOW?
YES
NO
CS49300 Family DSP
38 DS339F7
significant bit set to 1 to designate a read.
4) After the falling edge of the serial control clock
(SCCLK) for the read/write bit, the data is ready
to be clocked out on the control data out pin
(CDOUT). Data clocked out by the host is valid
on the rising edge of SCCLK and data
transitions occur on the falling edge of SCCLK.
The serial clock should be default low so that
eight transitions from low to high to low will
occur for each byte.
5) If INTREQ is still low, another byte should be
clocked out of the CS493XX. Please see the
discussion below for a complete description of
INTREQ behavior.
6) When INTREQ has risen, the chip select line of
the CS493XX should be raised to end the read
transaction.
Understanding the role of INTREQ is important for
successful communication. INTREQ is guaranteed
to remain low (once it has gone low) until the
second to last rising edge of SCCLK of the last byte
to be transferred out of the CS493XX. If there is no
more data to be transferred, INTREQ will go high
at this point. For SPI this is the rising edge for the
second to last bit of the last byte to be transferred.
After going high, INTREQ is guaranteed to stay
high until the next rising edge of SCCLK. This end
of transfer condition signals the host to end the
read transaction by clocking the last data bit out
and raising CS. If INTREQ is still low after the
second to last rising edge of SCCLK, the host
should continue reading data from the serial
control port.
It should be noted that all data should be read out
of the serial control port during one cycle or a loss
of data will occur. In other words, all data should be
read out of the chip until INTREQ signals the last
byte by going high as described above. Please see
Section 6.1.3, “INTREQ Behavior: A Special Case”
on page 41 for a more detailed description of
INTREQ behavior.
Figure 21, "SPI Timing" on page 39 timing diagram
shows the relative edges of the control lines for an
SPI read and write.
6.1.2. I2C Communication
I2C communication with the CS493XX is
accomplished with 3 communication lines: serial
control clock, a bi-directional serial data
input/output line and an interrupt request line to
signal that the DSP has data to transmit to the host.
See Figure 4, "I2C® Communication Signals" on
page 38 shows the mnemonic, pin name, and pin
number of each of these signals on the CS493XX.
Typically in I2C® communication SCDIO is an open
drain line with a pull-up. A logic one is placed on
the line by three-stating the output and allowing the
pull-up to raise the line. At this point another device
can drive the line low if necessary. Three-stating
SCDIO can have two effects: 1. To send out a one
when writing data or sending a “no acknowledge”;
2. release the line when another chip is writing
data.
6.1.2.1. Writing in I2C®
When writing to the device in I2C® the same
protocol will be used whether writing a byte, a
message or even an application code image. The
examples shown in this document can be
expanded to fit any write situation. Figure 23
shows a typical write sequence:
The following is a detailed description of an I2C®
write sequence with the CS493XX.
1) An I2C® transfer is initiated with an I2C® start
condition which is defined as the data (SCDIO)
line falling while the clock (SCCLK) is held
high.
2) Next a 7-bit address with the read/write bit set
low for a write should be sent to the CS493XX.
The address for the CS493XX defaults to
0000000b. It is necessary to clock this address
in prior to any transfer in order for the
CS493XX to accept the write. In other words a
byte of 0x00 should be clocked into the device
Mnemonic Pin Name Pin Number
Serial Clock SCCLK 7
Bi-Directional Data SCDIO 1 9
Interrupt Request INTREQ 20
Ta ble 4. I2C® Communication Signals
CS49300 Family DSP
DS339F7 39
AD6 AD4AD5 AD3 AD2 AD1 AD0 R/W D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D0
SCCLK
SCDIN
Note 1
SPI Write Functional Timing
Note 2
SPI Read Functional Timing
CS
AD6 AD4AD5 AD3 AD2 AD1 AD0 R/W
D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D0
SCDIN
SCCLK
SCDOUT
CS
INTREQ
Figure 21. SPI Timing
Notes: 1. INTREQ is guaranteed to stay LOW until the rising edge of SCCLK for bit D1 of the last byte
to be transferred ou t of the CS493XX.
2. INTREQ is guaranteed to remain HIGH until the next rising edge of SCCLK at which point it
may go LOW again if there is new data to be read. The condition of INTREQ going LOW at this
point should be treated as a new read condition. After a stop condition, a new start condition
and an address byte should be sent
CS49300 Family DSP
40 DS339F7
preceding any write. The 0x00 byte represents
the 7 bit of address (0000000b) and the
read/write bit set to 0 to designate a write.
3) After each byte (including the address and
each data byte) the host must release the data
line and provide a ninth clock for the CS493XX
to acknowledge. The CS493XX will drive the
data line low during the ninth clock to
acknowledge. If for some reason the CS493XX
does not acknowledge, it means that the last
byte sent was not received and should be
resent. If the resent byte fails to produce an
acknowledge, a stop condition should be sent
and the device should be reset.
4) The host should then clo ck data into the device
most significant bit first, one byte at a time. The
CS493XX will (and must) acknowledge each
byte that it receives which means that after
each byte the host must provide an
acknowledge clock pulse on SCCLK and
release the data line, SCDIO.
5) At the end of a data transfer a stop condition
must be sent. The stop condition is defined as
the rising edge of SCDIO while SCCLK is high.
6.1.2.2. Reading in I2C®
A read operation is necessary wh en the CS493XX
signals that it has data to be read. It does this by
dropping its interrupt request line (INTREQ) low.
When reading from the device in I2C®, the same
protocol will be used whether reading a single byte
or multiple bytes. The examples shown in this
document can be expanded to fit any read
situation. Figure 23 shows a typical I2C® read
sequence
1) An I2C® read transaction is initiated by the
CS493XX dropping INTREQ, signaling that it
has data to be read.
2) The host responds by sending an I2C® start
condition which is SCDIO dropping while
SCCLK is held high.
3) The start condition is followed by a 7-bit
address and the read/write bit set high for a
read. The address for the CS493XX defaults to
0000000b. It is necessary to clock this address
in prior to any transfer in order for the
CS493XX to acknowledge the read. In other
words a byte of 0x01 should be clocked into the
device preceding any read. The 0x01 byte
represents the 7 bit address 0000000b and a
read/write bit set to 1 to designate a read.
4) After the falling edge of the serial control clock
(SCCLK) for the read/write bit of the address
byte, an acknowledge must be read in by the
host. The CS493XX will drive SCDIO low to
acknowledge the address byte and to indicate
that it is ready for a read operation. If an
acknowledge is not sent by the CS493XX, a
stop condition should be issued and the read
sequence should be restarted.
5) The data is ready to be clocked out on the
SCDIO line at this point. Data clocked out by
SEND I2C START:
WRITE ADDRESS BYTE
SET TO 0 FOR WRITE
GET ACK
MORE DATA?
I2C STOP:
WITH MODE BIT
N
Y
DROP SCDIO LOW
WHILE SCCLK IS HIGH
SEND DATABYTE
GET ACK
RAISE SCDIO HIGH
WHILE SCCLK IS HIGH
Figure 22. I2C® Write Flow Diagram
CS49300 Family DSP
DS339F7 41
the host is valid on the rising edge of SCCLK
and data transitions occur on the falling edge of
SCCLK.
6) If INTREQ is still low after a byte transfer, an
acknowledge (SCDIO clocked low by SCCLK)
must be sent by the host to the CS493XX and
another byte should be clocked out of the
CS493XX. Please see the discussion below for
a complete description of INTREQ’s behavior.
7) When INTREQ has risen, a no acknowledge
should be sent by the host (SCDIO clocked
high by the host) to the CS493XX. This,
followed by an I2C® stop condition (SCDIO
raised, while SCCLK is high) signals an end of
read to the CS493XX.
Understanding the role of INTREQ is important for
successful communication. INTREQ is guaranteed
to remain low (once it has gone low), until the rising
edge of SCCLK for the last bit of the last byte to be
transferred out of the CS493XX (i.e. the rising
edge of SCCLK before the ACK SCCLK). If there
is no more data to be transferred, INTREQ will go
high at this point. After going high, INTREQ is
guaranteed to stay high until the next rising edge of
SCCLK (i.e. it will stay high until the rising edge of
SCCLK for the ACK/NACK bit). This end of transfer
condition signals the host to end the read
transaction by clocking the last data bit out of the
CS493XX and then sending a no acknowledge to
the CS493XX to signal that the read sequence is
over. At this point the host should send an I2C®
stop condition to complete the read sequence. If
INTREQ is still low after the rising edge of SCCLK
on the last data bit of the current byte, the host
should send an acknowledge and continue reading
data from the serial control port.
It should be noted that all data should be read out
of the serial control port during one cycle or a loss
of data will occur. In other words, all data should be
read out of the chip until INTREQ signals the last
byte by going high as d escribed above. Please see
Section 6.1.3, “INTREQ Behavior: A Special Case”
on page 41 for a more detailed description of
INTREQ behavior.
The timing diagram in Figu re 24, "I2C® Timing" on
page 42 shows the relative edges of the control
lines for an I2C® read and write.
6.1.3. INTREQ Behavior: A Special
Case
When communicating with the CS493 XX there are
two types of messages which force INTREQ to go
low. These messages are known as solicited
messages and unsolicited messages. For more
information on the specific types of me ssages that
require a read from the host, on e of the application
code user’s guides should be referenced.
INTREQ LOW? NO
YES
SEND I2C START:
DROP SCDIO LOW
WHILE SCCLK IS HIGH
WRITE ADDRESS BYTE
SET TO 1 FOR READ
WITH MODE BIT
GET ACK
READ DATABYTE
INTREQ STILL LOW?
NO
YES SEND ACK
SEND NACK
SEND I2C STOP:
WHILE SCLK IS HIGH
RISING EDGE OF SCDIO
Figure 23. I2C® Read Flow Diagram
CS49300 Family DSP
42 DS339F7
AD6 AD4AD5 AD3 AD2 AD1 AD0 R/W D7 D6 D5 D4 D3 D2 D1 ACKD0ACK D7 D6 D5 D4 D3 D2 D1 ACKD0 D7 D6 D5 D4 D3 D2 D1 ACKD0
I
2
CStart I
2
CStop
AD6 AD4AD5 AD3 AD2 AD1 AD0 R/W D7 D6 D5 D4 D3 D2 D1 ACKD0ACK D7 D6 D5 D4 D3 D2 D1 ACKD0 D7 D6 D5 D4 D3 D2 D1 NACKD0
I
2
CStart I
2
CStop
Note 1 Note 3
I
2
C Write Functional Timing
Note 4 Note 5
I
2
C Read Functional Timing
SCCLK
SCDIO
SCCLK
SCDIO
INTREQ
Note 2
Notes: 1. The ACK for the address byte is driven by the CS493XX.
2. The ACKs for the data byte s being read from the CS493XX should be driven by the host.
3. INTREQ is guaranteed to stay LOW until the rising edge of SCCLK for bit D0 of the last byte
to be transferred out of the CS493XX.
4. A NACK should be sent by the host after the last byte to indicate the end of the read cycle.
5. INTREQ is guaranteed to stay HIGH until the next rising edge of SCCLK (for the ACK/NACK
bit) at which point it may go LOW again if there is new data to be read. The condition of
INTREQ going LOW at this point should be treated as a new read condition. After a stop
condition, a new start condition followed by an address byte shou ld be sent.
Figure 24. I2C® Timing
CS49300 Family DSP
DS339F7 43
In general, when communicating with the
CS493XX, INTREQ will not go low unless the host
first sends a read request command message. In
other words the host must solicit a response from
the DSP. In this environment, the host must read
from the CS493XX until INTREQ goes high again.
Once the INTREQ pin has gone high it will not be
driven low until the host sends another read
request.
When unsolicited messages, such as those used
for Autodetect, have been enabled, the behavior of
INTREQ is noticeably different. The CS493XX will
drop the INTREQ pin whenever the DSP has an
outgoing message, even though the host may not
have requested data.
There are three ways in which INTREQ can be
affected by an unsolicited message:
1) During normal operation , while INTREQ is high,
the DSP could drop INTREQ to indicate an
outgoing message, without a prior read request.
2) The host is in the process of reading from the
CS493XX, meaning that INTREQ is already low.
An unsolicited message arrives which forces
INTREQ to remain low after the solicited message
is read.
3) The host is reading from the CS493XX when the
unsolicited message is queued, but INTREQ goes
high for one period of SCCLK and then goes low
again before the end of the read cycle.
In case (1) the host should perform a read
operation as discussed in the previous sections.
In case (2) an unsolicited message arrives before
the second to last SCCLK of the final byte transfer
of a read, forcin g the INTREQ pin to remain low. In
this scenario the host should continue to read fro m
the CS493XX without a stop/start condition or data
will be lost.
In case (3) an unsolicited message arrives
between the second to last SCCLK and the last
SCCLK of the final byte transfer of a read. In this
scenario, INTREQ will transition high for one clock
(as if the read transaction has ended), and then
back low (indicating that more data has queued).
This final case is the most complicated and shall
be explained in detail.
There are two constraints which completely
characterize the behavior of the INTREQ pin
during a read. The first constraint is that the
INTREQ pin is guaranteed to remain low until the
second to last SCCLK (SCCLK number N-1) of the
final byte being transferred from the CS493 XX (not
necessarily the second to last bit of the data byte).
The second constraint is that once the INTREQ pin
has gone high it is guaranteed to remain high until
the rising edge of the last SCCLK (SCCLK number
N) of the final byte being transferred from the
CS493XX (not necessarily the last bit of the data
byte). If an unsolicited message arrives in the
window of time between the rising edge of the
second to last SCCLK and the final SCCLK,
INTREQ will drop low on the rising edge of the final
SCCLK as illustrated in the functional timing
diagrams shown for I2C® and SPI read cycles.
INTREQ behavior for I2C® communication is
illustrated in Figure 24, "I2C® Timing" on p age 42.
When using I2C® communication the INTREQ pin
will remain low until the rising edge of SCCLK for
the data bit D0 (SCCLK N-1), but it can go low at
the rising edge of SCCLK for the NACK bit (SCCLK
N) if an unsolicited message has arrived. If no
unsolicited messages arrive, the INTREQ pin will
remain high after rising.
INTREQ behavior for SPI communication is
illustrated in Figure 21, "SPI Timing" on page 39.
When using SPI communication, the INTREQ pin
will remain low until the rising edge of SCCLK for
the data bit D1 (SCCLK N-1), but it can go low at
the rising edge of SCCLK for data bit D0 (SCCLK
N) if an unsolicited message has arrived. If no
unsolicited messages arrive, the INTREQ pin will
remain high after rising.
Ideally, the host will sample INTREQ on the falling
edge of SCCLK number N-1 of the final byte of
each read response message. If INTREQ is
sampled high, the host should conclude the current
read cycle using the stop condition defined for the
communication mode chosen. The host should
then begin a new read cycle complete with the
appropriate start condition and the chip address. If
INTREQ is sampled low, the host should continue
reading the next message from the CS493XX
without ending the current read cycle.
CS49300 Family DSP
44 DS339F7
When using automated communication ports,
however, the host is often limited to sampling the
status of INTREQ after an entire byte has been
transferred. In this situation a low-high-low
transition (case 3) would be missed and the host
will see a constantly low INTREQ pin. Since the
host should read from the CS493XX un til it detects
that INTREQ has gone high, this condition will be
treated as a multiple-message read (more than
one read response is provided by the CS493XX).
Under these conditions a single byte of 0x00 will be
read out before the unsolicited message.
The length of every read response is defined in the
user’s manual for each piece of application code.
Thus, the host should know how many bytes to
expect based on the first byte (the OPCODE) of a
read response message. It is guaranteed that no
read responses will begin with 0x00, which means
that a NULL byte (0x00) detected in the OPCODE
position of a read response message should be
discarded. Please see an Application Code User’s
Guide for an explanation of the OPCODE.
It is important that the host be aware of the
presence of NULL bytes, or the communication
channel could become corrupted.
When case (3) occurs and the host issues a stop
condition before starting a new re ad cycle, the first
byte of the unsolicited message is loaded directly
into the shift register and 0x00 is never seen.
Alternatively, if case (3) occurs and the host
continues to read from the CS493XX without a
stop condition (a multiple message read), the 0x00
byte must be shifted out of the CS493XX before
the first byte of the unsolicited message can be
read.
In other words, if a system can only sample
INTREQ after an entire byte transfer the following
routine should be used if INTREQ is low after the
last byte of the message being read:
1) Read one byte
2) If the byte = 0x00 discard it and skip to step 3.
If the byte != 0x00 then it is the OPCODE for
the next message. For this case skip to step 4.
3) Read one more byte. This is the OPCODE for
the next message.
4) Read the rest of the message as indicated in
the previous sections.
6.2. Parallel Host Communication
The parallel host communication modes of the
CS493XX provide an 8-bit interface to the DSP. An
Intel-style parallel mode and a Motorola-style
parallel mode are supported. The host interface is
implemented using four communication registers
within the CS493XX as shown in Table 5, “Parallel
Input/Output Registers,” on page 45.
When the host is downloading code to the
CS493XX or configuring the application code,
control messages will be written to (and read from)
the Host Message register. The Host Control
register is used during messaging sessions to
determine when the CS493XX can accept another
byte of control data, and when the CS493XX has
an outgoing byte that may be read.
The PCM Data and Compressed Data registers
are used strictly for the transfer of audio data. The
host cannot read from these two registers. Audio
data written to registers 11b and 10b are
transferred directly to the internal FIFOs of the
CS493XX. When the level of the PCM FIFO
reaches the FIFO threshold level, the MFC bit of
the Host Control register will be set. When the level
of the Compressed Data FIFO reaches the FIFO
threshold level, the MFB bit of the Host Control
register will be set.
It is important to remember that the parallel host
interface requires the DATA[7:0] pins of the
CS493XX. The external memory interface also
requires the DATA[7:0] pins so the Parallel host
control modes can only be used if external memory
is not required.
A detailed description for each parallel host mode
will now be given. The following informa tion will be
provided for the Intel mode and Motorola mode:
• The pins of the CS493XX which must be used
for proper communication
• Flow diagram and description for a parallel
byte write
• Flow diagram and description for a parallel
byte read
The four registers of the CS493XX’s parallel host
mode are not used identically. The algorithm used
for communicating with each register will be given
CS49300 Family DSP
DS339F7 45
as a functional description, building upon the basic
read and write protocols defined in the Motorola
and Intel sections. The following will be covered:
• Flow diagram and description for a control
write
• Flow diagram and description for a control read
Host Message (HOSTMSG) Register, A[1:0] = 00b
HOSTMSG7–0 Host data to and from the DSP. A read or write of this register operates handshake bits between
the internal DSP and the external host. This register typically passes multibyt e me ssa g es car-
rying microcod e, control, and configu ration data. HOSTMSG is physically implemente d as two
independent registers for input and output (read and write).
Host Control (CONTROL) Register, A[1:0] = 01b
Reserved Always write a 0 for future compatibility.
CMPRST When set, initializes the CMPDATA compressed data input channel. Writing a one to this bit
holds the port in rese t. Writing zero enables the port. Th is bit must be low for nor mal operation.
(Write only)
PCMRST When set, initializes the PCMDATA linear PCM input channel. Writing a one to this bit holds the
port in reset. Writing zero enables the port. This bit must be low for normal operation. (Write
only)
MFC When high, indicates that the PCMDATA input buffer is almost full. (read only)
MFB When high, indicates that the CMPDATA input buffer is almost full. (read only)
HINBSY Set when the host writes to HOSTMSG. Cleared when the DSP reads data from the HOSTMSG
register. The host reads this bit to determine if the last host byte written has been read by the
DSP. (Read only)
HOUTRDY Set when the DSP writes to the HOSTMSG register. Cleared when the host read s data from
the HOSTMSG register. The DSP reads this bit to determine if the last DSP output byte has
been read by the host. (read only)
Reserved Always write a 0 for future compatibility.
PCM Data Input (PCMDATA) Register, A[1:0] = 10b
PCMDATA7–0 The host writes PCM data to the DSP input buffer at this address. (Write only)
Compressed Data Input (CMPDATA) Register, A[1:0] = 11b
CMPDATA7–0 The host writes compressed data to the DSP input buffer at this address. (Write only)
76543210
HOSTMSG7 HOSTMSG6 HOSTMSG5 HOSTMSG4 HOSTMSG3 HOSTMSG2 HOSTMSG1 HOSTMSG0
76543210
Reserved CMPRST PCMRST MFC MFB HINBSY HOUTRDY Reserved
76543210
PCMDATA7 PCMDATA6 PCMDATA5 PCMDATA4 PCMDATA3 PCMDATA2 PCMDATA1 PCMDATA0
76543210
CMPDATA7 CMPDATA6 CMPDATA5 CMPDATA4 CMPDATA3 CMPDATA2 CMPDATA1 CMPDATA0
Table 5. Parallel Input/Output Registers
CS49300 Family DSP
46 DS339F7
6.2.1. Intel Parallel Host
Communication Mode
The Intel parallel host communication mode is
implemented using the pins given in Table 6.
The INTREQ pin is controlled by the application
code when a parallel host communication mode
has been selected. When the code supports
INTREQ notification, the INTREQ pin is asserted
whenever the DSP has an outgoing message for
the host. This same information is reflected by the
HOUTRDY bit of the Host Control Register (A[1:0]
= 01b).
INTREQ is useful for informing the host of
unsolicited messages. An unsolicited message is
defined as a message generated by the DSP
without an associated host read request.
Unsolicited messages can be used to notify the
host of conditions such as a change in the
incoming audio data type (e.g. PCM --> AC-3).
6.2.1.1. Writing a Byte in Intel Mode
Information provided in this section is intended as
a functional description of how to write control
information to the CS493XX. The system designer
must insure that all of the timing constraints of the
Intel Parallel Host Mode Write Cycle are met.
The flow diagram shown in Figure 24 illustrates the
sequence of events that define a one-byte write in
Intel mode. The protocol presented in Figure 24
will now be described in detail.
1) The host must first drive the A1 and A0 re gister
address pins of the CS493XX with th e address
of the desired Parallel I/O Register.
Host Message: A[1:0]==00b.
Host Control: A[1:0]==01b.
PCMDATA: A[1:0]==10b.
CMPDATA: A[1:0]==11b.
2) The host then indicates that the selected
register will be written. The host initiates a write
cycle by driving the CS and WR pins low.
3) The host drives the data byte to the DATA[7: 0]
pins of the CS493XX.
4) Once the setup time for the write has been met,
the host ends the write cycle by driving the CS
and WR pins high.
6.2.1.2. Reading a Byte in Intel Mode
Information provided in this section is intended as
a functional description of how to write control
information to the CS493XX. The system designer
must insure that all of the timing constraints of the
Intel Parallel Host Mode Read Cycle are met.
Mnemonic Pin Name Pin Number
Chip Select CS 18
Write Enable WR 4
Output Enable RD 5
Register Address Bit 1 A1 6
Register Address Bit 0 A0 7
Interrupt Request INTREQ 19
DATA7 DATA7 8
DATA6 DATA6 9
DATA5 DATA5 10
DATA4 DATA4 11
DATA3 DATA3 14
DATA2 DATA2 15
DATA1 DATA1 16
DATA0 DATA0 17
Table 6. Intel Mode Communication Signals
ADDRESS A PARALLEL I/O REGISTER
CS (LOW)
WRITE BYTE TO
CS (HIGH)
WR (LOW)
(A[1:0] SET APPROPRIATELY
DATA [7:0]
WR (HIGH)
Figure 24. Intel Mode, One-Byt e Write Flow Dia-
CS49300 Family DSP
DS339F7 47
The flow diagram shown in Figure 25 illustrates the
sequence of events that define a one-byte read in
Intel mode. The protocol presented in Figure 25
will now be described in detail.
1) The host must first drive the A1 and A0 register
address pins of the CS493XX with the address
of the desired Parallel I/O Register. Note that
only the Host Message register and the Host
Control register can be re ad.
Host Message: A[1:0]==00b.
Host Control: A[1:0]==01b.
2) The host now indicates that the selected
register will be read. The host initiates a read
cycle by driving the CS and RD pins low.
3) Once the data is valid, the host can read the
value of the selected register from the
DATA[7:0] pins of the CS493XX.
4) The host should now terminate the read cycle
by driving the CS and RD pins high.
6.2.2. Motorola Parallel Host
Communication Mode
The Motorola parallel host commun ication mode is
implemented using the pins given in Table 7. The
INTREQ pin is controlled by the application code
when a parallel host communication mode has
been selected. When the code supports INTREQ
notification, the INTREQ pin is asserted whenever
the DSP has an outgoing message for the host.
This same information is reflected by the
HOUTRDY bit of the Host Control Register (A[1:0]
= 01b).
INTREQ is useful for informing the host of
unsolicited messages. An unsolicited message is
defined as a message generated by the DSP
without an associated host read request.
Unsolicited messages can be used to notify the
host of conditions such as a change in the
incoming audio data type (e.g. PCM --> AC-3)
6.2.2.1. Writing a Byte in Motorola Mode
Information provided in this section is intended as
a functional description of how to write control
information to the CS493XX. The system designer
must insure that all of the timing constraints of the
Motorola Parallel Host Mode Write Cycle are met.
The flow diagram shown in Figure 26 illustrates the
sequence of events that define a one-byte write in
Motorola mode. The protocol presented in
Figure 26 will now be described in detail.
1) The host must drive the A1 and A0 register
address pins of the CS493XX with th e address
of the address of the desired Parallel I/O
Register.
Host Message: A[1:0]==00b.
Host Control: A[1:0]==01b.
PCMDATA: A[1:0]==10b.
Figure 25. Intel Mode, One-Byte Read Flow Dia-
ADDRESS A PARALLEL I/O REGISTER
CS (LOW)
READ BYTE FROM
CS (HIGH)
RD (LOW)
(A[1:0] SET APPROPRIATELY
DATA [7:0]
RD (HIGH)
Mnemonic Pin Name Pin Number
Chip Select CS 18
Data Strobe DS 4
Read or Write Select R/W 5
Register Address Bit 1 A1 6
Register Address Bit 0 A0 7
Interrupt Request INTREQ 19
DATA7 DATA7 8
DATA6 DATA6 9
DATA5 DATA5 10
DATA4 DATA4 11
DATA3 DATA3 14
DATA2 DATA2 15
DATA1 DATA1 16
DATA0 DATA0 17
Table 7. Motorola Mode Communication Signals
CS49300 Family DSP
48 DS339F7
CMPDATA: A[1:0]==11b.
The host indicates that this is a write cycle
by driving the R/W pin low.
2) The host initiates a write cycle by driving the
CS and DS pins low.
3) The host drives the data byte to the DATA[7:0]
pins of the CS493XX.
4) Once the setup time for the write has been met,
the host ends the write cycle by driving the CS
and DS pins high.
6.2.2.2. Reading a Byte in Motorola Mode
The flow diagram shown in Figure 27 illustrates the
sequence of events that define a one-byte read in
Motorola mode. The protocol presented Figure 27
will now be described in detail.
1) The host must drive the A1 and A0 register
address pins of the CS493XX with the address
of the desired Parallel I/O Register. Note that
only the Host Message register and the Host
Control register can be re ad.
Host Message: A[1:0]==00b.
Host Control: A[1:0]==01b.
The host indicates that this is a read cycle
by driving the R/W pin high.
2) The host initiates the read cycle by driving the
CS and DS pins low.
3) Once the data is valid, the host can read the
value of the selected register from the
DATA[7:0] pins of the CS493XX.
4) The host should now terminate the read cycle
by driving the CS and DS pins high.
6.2.3. Procedures for Parallel Host
Mode Communication
6.2.3.1. Control Write in a Parallel Host
Mode
When writing control data to the CS493XX, the
same protocol is used whether the host is writing a
control message or an entire executable downloa d
image. Messages sent to the CS493XX should be
written most significant byte first. Likewise,
downloads of the application code should also be
performed most significant byte first.
The example shown in this section can be
generalized to fit any control write situation. The
generic function ‘Read_Byte_*()’ is used in the
following example as a generalized reference to
Figure 26. Motorola Mode, One-Byte Write Flow
Diagram
R/W (LOW)
CS (LOW)
WRITE BYTE TO
CS (HIGH)
DS (LOW)
ADDRESS A PARALLEL I/O REGISTER
DATA [7:0]
DS (HIGH)
(A[1:0] SET APPROPRIATELY
Figure 27. Motorola Mode, One-Byte Read Flow
Diagram
R/W (HIGH)
CS (LOW)
READ BYTE FROM
CS (HIGH)
ADDRESS A PARALLEL I/O REGISTER
DATA [7:0]
DS (HIGH)
(A[1:0] SET APPROPRIATELY
DS (LOW)
CS49300 Family DSP
DS339F7 49
either Read_Byte_MOT() or Read_Byte_INT(),
and ‘Write_Byte_*()’ is a generic reference to
Write_Byte_MOT() or Write_Byte_INT(). Figure 28
shows a typical write sequence. The protocol
presented in Figure 28 will now be described in
detail.
1) When the host is communicating with the
CS493XX, the host must verify that the DSP is
ready to accept a new control byte. If the DSP
is in the midst of an interrupt service routine, it
will be unable to retrieve control data from the
Host Message Register. Please note that
‘Read_Byte_*()’ and ‘Write_Byte_*()’ are
generic references to either the Intel or
Motorola communication protocol.
If the most recent control byte has not yet
been read by the DSP, the host must not
write a new byte.
2) In order to determine whether the CS493XX is
ready to accept a new control byte the host
must check the HINBSY bit of the Host Control
Register (bit 2). If HINBSY is high, then the
DSP is not prepared to accept a new control
byte, and the host should poll the Host Control
Register again. If HINBSY is low, then the host
may write a control byte into the Host Message
Register.
3) The host knows that the DSP is ready for a new
control byte at this point and should write the
control byte to the Host Message Register
(A[1:0] = 00b).
4) If the host would like to write any more control
bytes to the CS493XX, the host should once
again poll the Host Control Register (return to
step 1).
6.2.3.2. Control Read in a Parallel Host
Mode
When reading control data from the CS493XX, the
same protocol is used whether the host is reading
a single byte or a 6 byte message.
During the boot procedure, a handshaking protocol
is used by the CS493XX. This handsha ke consists
of a 3 byte write to the CS493XX followed by a 1
byte response from the DSP. The host must read
the response byte and act accordingly. The boot
procedure is discussed in Section 8.1, “Host Boot”
on page 54.
During regular operation (at run-time), the
responses from the CS493XX will always be 6
bytes in length.
The example shown in this section can be used for
any control read situation. The generic function
‘Read_Byte_*()’ is used in the following example
as a generalized reference to either
Read_Byte_MOT() or Read_Byte_INT().
Figure 29 shows a typical read sequence. The
protocol presented in Figure 29 will now be
described in detail.
1) Optionally, INTREQ going low may be used as
an interrupt to the host to indicate that the
CS493XX has an outgoing message. Even
with the use of INTREQ, HOUTRDY must be
checked to insure that bytes are ready for the
host during the read process. Please note that
INTREQ does not go low to indicate an
outgoing message during boot.
2) The host reads the Host Control Register
(A[1:0] = 01b) in order to d etermine the state of
Figure 28. Typical Parallel Host Mode Control
Write Sequence Flow Diagram
READ_BYTE_*(HOST CONTROL REGISTER)
WRITE_BYTE_*(HOST MESSAGE REGISTER)
MORE BYTES
HINSBY==1 YES
NO
TO WRITE?
YES
NO
FINISHED
CS49300 Family DSP
50 DS339F7
the communication interface. Please note that
‘Read_Byte_*()’ is a generalized reference to
either Read_Byte_MOT() or Read_Byte_INT().
3) In order to determine whether the CS493XX
has an outgoing control byte that is valid, the
host must check the HOUTRDY bit of the Host
Control Register (bit 1). If HOUTRDY is high,
then the Host Message Register contains a
valid message byte for the host. If HOUTRDY
is low, then the DSP has not placed a new
control byte in the Host Message Register, and
the host should poll the Host Control Register
again.
4) The host knows that the DSP is ready to
provide a new response byte at this point. The
host can safely read a byte from the Host
Message Register (A[1:0] = 00b).
5) If the host expects to read any more response
bytes, the host should once again check the
HOUTRDY bit (return to step 1). Please refer to
one of the application code user’s guides to
determine the length of messages to read from
the CS493XX. Typically this length is 1, 3 or 6
bytes, and can be deduced from the message
OPCODE.
6) After the response has been read the host
should wait at least 100 uS and check
HOUTRDY one final time. If HOUTRDY is high
once again this means that an unsolicited
message has come during the read process
and the host has another message to read (i.e.
skip back to step 4 and read out the new
message).
Figure 29. Typical Parallel Host Mode Control
Read Sequence Flow Diagram
READ_BYTE_*(HOST CONTROL REGISTER)
READ_BYTE_*(HOST MESSAGE REGISTER)
MORE BYTES
HOUTRDY==1 NO
YES
TO READ?
YES
NO
FINISHED
INTREQ = 0
YES
WAIT 100 uS
READ_BYTE_*(HOST CONTROL REGISTER)
HOUTRDY==1
NO
YES
CS49300 Family DSP
DS339F7 51
7. EXTERNAL MEMORY
If using one of the serial modes, i.e . SPI or I2C, the
system designer has the option of using external
memory. The external memory interface is not
compatible with the parallel modes since there are
shared pins that are needed by each mode.
The external memory interface was designed for
autoboot and to extend the data memory range of
the DSP during runtime. The application user’s
guide for a particular code load will inform the
system designer if memory is required. If no
mention is made of external memory, then external
memory is not required for that application.
The external memory interface is implemented on
the CS493XX with the following signals:
EMAD[7:0], EXTMEM, EMOE, and EMWR.
Table 8 shows the pin name, pin description and
pin number of each signal on the CS493XX.
EMAD[7:0] serve as a multiplexed address and
data bus. EMOE is an active-low external-memo ry
data output enable as well as the address latch
strobe. EMWR is an active low write enable.
EXTMEM serves as the active low chip select
output.
Figure 30, "External Memory Interface" on page 53
illustrates one possible external memory
architecture for the CS493XX. Figure 31, "External
Memory Read (16-bit address)" on page 5 3 shows
the functional timing of a 16 bit address memory
read and Figure 32, "External Memory Write (16-
bit address)" on page 53 shows the functional
timing of a 16 bit address memory write. It should
be noted that this memory example give s the DSP
visibility to up to 64 kilobytes of memory.
The external memory address is capable of
addressing up to 16 megabytes total through a 24
bit addressing scheme. The address comes from
the DSP writing three initial bytes of address
consecutively on EMAD[7:0]. Each byte of address
is externally latched with the rising edge of EMOE
while EXTMEM is high. After the 3-byte address is
latched externally, the CS493XX then drives
EXTMEM and EMOE low simultaneously to select
the external memory. During this time the data is
read by the CS493XX.
To extend the example shown in Figures 30 to 32
to allow for a 24-bit address, the system designer
would add another latch to the system. The DSP
always places the most significant address bits first
(see Figures 30, 31, and 32 for details).
It should be noted that there are currently no
applications for the CS493XX that use more than
32 kilobytes of external memory (RAM or ROM),
which corresponds to only 15 address lines.
7.1. Non-Paged Memory
Non-paged memories can be used for autobootin g
a single piece of full download application code
such as MP3, HDCD, or SRS Circle Surround. A
non-paged memory architecture shou ld be used in
systems which will need to access a single dsp
application code image (32 Kilobyte maximum),
which means that only 15 bits would be required to
access the entire application code image. The 16th
address bit coming from the DSP should be left
unconnected. Figure 35 shows the functional
timing of an autoboot sequence in which three
address cycles are illustrated.
The DSP always considers its address space to
range from 0x0000 to 0xFFFF. This means that the
decoder is unaware of any data which falls outside
of this 64 Kilobyte range. When the DSP is
performing an autoboot, the process always
begins with address 0x0000. This means that the
host microcontroller must be involved in memory
accesses which exceed the 32 Kilobyte scope of
the CS493XX, and the host must also manage
access to all pieces of autoboot code which do not
Pin Name Pin Description Pin
Number
/EMOE * External Memory Output Enable
& Address Latch Strobe 5
/EMWR * External Memory Write Strobe 4
/EXTMEM External Memory Select 21
EMAD7 Address and Data Bit 7 8
EMAD6 Address and Data Bit 6 9
EMAD5 Address and Data Bit 5 10
EMAD4 Address and Data Bit 4 11
EMAD3 Address and Data Bit 3 14
EMAD2 Address and Data Bit 2 15
EMAD1 Address and Data Bit 1 16
EMAD0 Address and Data Bit 0 17
* - These pins must be configured appropriately to
select a serial host communication mode for the
CS493XX at the rising edge of RESET
Table 8. Memory Interface Pins
CS49300 Family DSP
52 DS339F7
physically reside at location 0x0000. The
limitations of a non-paged memory are easily seen,
and they can be circumvented using paged
memory designs as discussed in the next section.
7.2. Paged Memory
Sometimes it is desirable for the external memory
to be paged by the host controller. One application
where this is useful is the autoboot mechanism
(discussed in Section 8.2, “Autoboot” on page 57).
Using paged memory allows multiple dsp firmware
applications to be stored in the same memory, with
one application code image residing in each 32
kilobyte page.
Paging of the external memory is handled entirely
by the host controller. The host controller should
directly control all address bits outside of the
memory space to be used by the DSP. As 32
kilobyte pages are desired to hold each application
code, the DSP would need 15 bits for the address
space. The system designer would connect the 15
address signals from the a ddress latches while the
host would directly control all address signals
above 15 bits to page the memory accordingly.
CS49300 Family DSP
DS339F7 53
32K X 8
ROM/RAM
ADDR[14:8]
ADDR[7:0]
8 BIT
'574
DFF
DQ
8 BIT
'574
DFF
DQ
EMAD[7:0] DATA[7:0]
OE
EMOE
EXTMEM CS
EMWR
Only one of R1 and R2 should be stuffed.
Only one of R3 and R4 shou
ld be stuffed.
The state of EMOE and EMWR at the
rising edge of RESET will determine the
serial mode that the part comes up in
while using external memory. Please see
section 2, Serial Communication for
more details.
ADDR[7:0]
ADDR[14:8]
8
3.3V 3.3V
3.3V
3.3V
R1 R3
R2 R4
WE (RAM Only)
CS493XX
Figure 30. External Memory Interface
EXTMEM
EMOE
EMWR
EMAD7:0 MA15:8 MA7:0 Data7:0
MA 23:16
Figure 31. External Memory Read (16-bit address)
EXTMEM
EMOE
EMWR
EMAD7:0 MA15:8 MA7:0 Data7:0
MA 23:16
Figure 32. External Memory Write (16- bi t ad d re s s)
CS49300 Family DSP
54 DS339F7
8. BOOT PROCEDURE & RESET
In this section the process of booting and
downloading to the CS493XX will be covered as
well as how to perform a soft reset. Host boot and
autoboot and reset are covered in this section.
8.1. Host Boot
A flow diagram of a typical serial download
sequence and a typical parallel download
sequence will be presented, as well as
pseudocode representing a download sequence
from the programmers perspective. The
pseudocode is written in a general sense where
function calls are made to Write_* and Read_*.
The * can be replaced by I2C or SPI for the serial
download sequence, and INTEL or MOTO for the
parallel download sequence, depending on the
mode of host communication. For each case the
general download algorithm is the same.
The download and boot procedure is
accomplished with RESET (pin 36), and the
communication pins discussed in Section 6,
“Control” on page 36. The flow diagrams in
Figure 33. Typical Serial Boot and Download
Procedure, and Figure 34. Typical Parallel Boot
and Download Procedure, illustrate typical boot
and download procedures. When reading in serial
mode, you must check that INTREQ is low to start
reading. Similarly, in parallel mode you must check
HOUTRDY.
Table 9 defines the boot write messages and
Table 10 defines the boot read messages in
mnemonic and actual hex value. These message s
will be used in the boot sequence.
Hardware configuration messages are used to
define the behavior of the DSP’s audio ports. A
more detailed description of the diffe rent hardware
configurations can be found in the Section 11,
“Hardware Configuration” on page 74.
The software configuration messages are specific
to each application. The application code user’s
guide for each application provides a list of all
pertinent configuration messages. Writing the
KICKSTART message to the CS493XX begins the
audio decode process. The KICKSTART me ssage
will also be described in the user’s guide for each
application. Until the KICKSTART has been sent,
the decoder is in a wait state.
8.1.1. Serial Download Sequence
The following is a detailed description of a serial
download sequence for the CS493XX.
Note: When reading from the chip in a serial
communication mode, the host must wait for the
interrupt request (INTREQ) to fall before
starting the read cycle.
1) A download sequence is started when the host
issues a hard reset and holds the mode pins
appropriately (WR, RD, and PSEL).
2) The host should then send the boot message
DOWNLOAD_BOOT (0x000004). This causes
the CS493XX to initialize itself for download.
3) If the initialization was successful the
CS493XX sends out the boot message
BOOT_START (0x01) and the host should
proceed to step 5.
4) If initialization fails, the CS493XX sends out an
INIT_FAILURE boot message byte (0xFD or
0xFE), INVALID_MSG byte (0xFB), or
BOOT_ERROR byte (0xFA or 0xFC) and spins
MNEMONIC VALUE
SOFT_RESET 0x000001
RESERVED 0x000002
RESERVED 0x000003
DOWNLOAD_BOOT 0x000004
BOOT_SUCCESS_RECEIVED 0x000005
Table 9. Boot Write Messages
MNEMONIC VALUE
BOOT_START 0x01
BOOT_SUCCESS 0x02
APPLICATION_FAILURE 0xF0
BOOT_ERROR 0xFA
INVALID_MSG 0xFB
BOOT_ERROR 0xFC
INIT_FAILURE 0xFD
INIT_FAILURE 0xFE
BAD_CHECKSUM 0xFF
Table 10. Boot Read Messages
CS49300 Family DSP
DS339F7 55
Figure 33. Typical Serial Boot and Download Procedure
Notes: 1. RESET must be held LOW for
trstl.
2. It should be noted that mode
pins are used to configure the
CS493XX serial communication
mode. Thes e mo d e pin s ar e
latched internally on the rising
edge of reset. The pins can be
set dynamically by a
microprocessor or can be
statically pulled HIGH or LOW.
If these pins are driven
dynamically, setup an d ho ld
times must be satisfied as
stated in the CS493XX Data
Sheet. More information about
the function of the mode pins
can be found in the CS 493 XX
Data Sheet and in Section 6,
“Control” on page 36.
3. Time-out values reflect worst
case response time for the
CS493XX. The values shown
may be used for the host’s time-
out control loop.
4. 5 ms is typical but this time is
application code specific and
may be as high as 10 ms. Wait
times should be verified by the
designer.
5. Hardware configuration
messages ar e covered in
Section 6, “Control” on page 36.
Application configuration
messages are covered in each
application code user’s manual.
INTREQ LOW? N
Y
WRITE_*(DOWNLOAD_
RESET(LOW) (NOTE 1) RESET(HIGH) (NOTE 2) WAIT 500 µs
BOOT, MSG_SIZE)
TIMEOUT AFTER
20MS (NOTE 3)
READ_*(MESSAGE)
MESSAGE == N
Y
BOOTSTART?
INTREQ LOW? N
Y
WRITE_*(.LD FILE,
TIMEOUT AFTER
20MS (NOTE 3)
DOWNLOAD FILE SIZE)
READ_*(MESSAGE)
MESSAGE == N
Y
EXIT(ERROR)
BOOT_SUCCESS?
WRITE_*(BOOT_
SUCCESS_RECEIVED,
MSG-SIZE)
WAIT 5 MS (NOTE 4) DOWNLOAD COMPLETE
WRITE_*(SW_CONFIG_MSG,
SW_MSG_SIZE)
(NOTE 5)
WRITE_*(KICKSTART,
MSG_SIZE)
(NOTE 5)
WRITE_*(HW_CONFIG_MSG,
HW_MSG_SIZE)
(NOTE 5)
EXIT(ERROR)
CS49300 Family DSP
56 DS339F7
Figure 34. Typical Parallel Boot and Download Procedure
Notes: 1. RESET must be held LOW for
trstl.
2. It should be noted that mode
pins are used to configure the
CS493XX serial communicatio n
mode. These mode pins are
latched internally on the rising
edge of reset. The pins can be
set dynamically by a
microprocessor or can be
statically pulled HIGH or LOW. If
these pins are driven
dynamically, setu p an d ho ld
times must be satisfied as stated
in the CS493XX Data Sheet.
More informatio n about the
function of the mode pins can be
found in the CS493XX Data
Sheet and in Section 6, “Control”
on page 36.
3. Time-out values reflect worst
case response time for the
CS493XX. The values shown
may be used for the host’s time-
out control loop.
4. 5 ms is typical but this time is
application code specific and
may be as high as 10 ms. Wait
times should be verified by the
designer.
5. Hardware configuration
messages are covered in
Section 6, “Control” on page 36 .
Application configuration
messages are covered in each
application code user’s manual .
HOUTRDY LOW? N
Y
WRITE_*(DOWNLOAD_
RESET(LOW) (NOTE 1) RESET(HIGH) (NOTE 2) WAIT 500 µs BOOT, MSG_SIZE)
TIMEOUT AFTER
20MS (NOTE 3)
READ_*(MESSAGE)
MESSAGE == N
Y
BOOTSTART?
WRITE_*(.LD FILE,
TIMEOUT AFTER
20MS (NOTE 3)
DOWNLOAD FILE SIZE)
READ_*(MESSAGE)
MESSAGE == N
Y
EXIT(ERROR)
BOOT_SUCCESS?
WRITE_*(BOOT_
SUCCESS_RECEIVED,
MSG-SIZE)
WAIT 5 MS (NOTE 4) DOWNLOAD COMPLETE
WRITE_*(SW_CONFIG_MSG,
SW_MSG_SIZE)
(NOTE 5)
WRITE_*(KICKSTART,
MSG_SIZE)
(NOTE 5)
WRITE_*(HW_CONFIG_MSG,
HW_MSG_SIZE)
(NOTE 5)
EXIT(ERROR)
READ HOSTCTL
REGISTER
HOUTRDY LOW? N
Y
READ HOSTCTL
REGISTER
CS49300 Family DSP
DS339F7 57
waiting for a hard reset. The host should re-try
steps 1 through 3 and if failure is met again, the
serial communication timing and protocol
should be inspected.
5) After receiving the BOOT_START byte, the
host should write the downloadable image
(from the .LD file).
6) The end of the .LD file contains a three byte
checksum. If the checksum is good after
download, the CS493XX will send a
BOOT_SUCCESS message (0x02) to the
host. If the checksum was bad, the CS493XX
responds with the BAD_CHECKSUM message
byte (0xFF) and spins, waiting for hard reset.
7) After reading out the BOOT_SUCCESS byte,
the host should send the
BOOT_SUCCESS_RECEIVED message
(0x000005) which will cause an internal
application code reset and allow the
downloaded application to run.
8) After waiting 5ms to allow the downloaded
application to initialize, the host can send
configuration messages for both hardware and
software configuration.
8.1.2. Parallel Download Sequence
The following is a detailed description of a parallel
download sequence for the CS493XX.
Note: When reading from the chip in a parallel
communication mode, the host must read the
HOSTCTL register and test the HOUTRDY bit
before startin g the re ad c ycle .
1) A download sequence is started when th e host
issues a hard reset and holds the mode pins
appropriately (WR, RD, and PSEL).
2) The host should then send the boot message
DOWNLOAD_BOOT (0x000004). This causes
the CS493XX to initialize itself for download.
3) If the initialization was successful the
CS493XX sends out the boot message
BOOT_START (0x01) and the host should
proceed to step 5.
4) If initialization fails, the CS493XX sends out an
INIT_FAILURE boot message byte (0xFD or
0xFE), INVALID_MSG byte (0xFB), or
BOOT_ERROR byte (0xFA or 0xFC) and spins
waiting for a hard reset. The host should re-try
steps 1 through 3 and if failure is met again, the
serial communication timing and protocol
should be inspected.
5) After receiving the BOOT_START byte, the
host should write the downloadable image
(from the .LD file).
6) The end of the .LD file contains a three byte
checksum. If the checksum is good after
download, the CS493XX will send a
BOOT_SUCCESS message (0x02) to the
host. If the checksum was bad, the CS493XX
responds with the BAD_CHECKSUM message
byte (0xFF) and spins, waiting for hard reset.
7) After reading out the BOOT_SUCCESS byte,
the host should send the
BOOT_SUCCESS_RECEIVED message
(0x000005) which will cause an internal
application code reset and allow the
downloaded application to run.
8) After waiting 5ms to allow the downloaded
application to initialize, the host can send
configuration messages fo r both hardware and
software configuration.
8.2. Autoboot
Autoboot is a feature available on all DSPs in the
CS493XX family which gives the decoder the
ability to load application code into itself from an
external memory. Because external memory is
accessed through the external memory interface,
autoboot restricts the host control modes to serial
communication (I2C or SPI). For this section the
external memory interface shown in Figure 30,
"External Memory Interface" on page 53 can be
referenced.
RESET and ABOOT are the control pins which are
used to initiate an autoboot operation by the host
controller. It is important to be aware that the
ABOOT pin also serves as the INTREQ pin, which
means that it will be driven by the CS493XX when
not in reset. Due to this constraint, ABOOT should
be connected to an open-drain output of the
microcontroller so as to allow the specified pull-up
resistor to generate a logic high level. At the
completion of a successful download, INTREQ
(ABOOT) becomes an output and the host should
no longer drive it.
CS49300 Family DSP
58 DS339F7
The timing for an autoboot sequence is illustrated
in Figure 35. The sequence is initiated by driving
RESET low and placing the decoder into reset. At
the rising edge of RESET, the ABOOT, WR, and
RD pins are sampled. If ABOOT is low when
sampled, and the WR and RD pins are set to
configure the device for serial communications, the
device will begin to autoboot (PSEL is a don’t care
for serial communications modes). Section 6.1,
“Serial Communication” on page 36 discusses the
procedure required for placing the CS493XX into a
serial communication mode in more detail. For a
more thorough description of ABOOT’s behavior
after the rising edge of RESET please refer to
Section 8.2.1, “Autoboot INTREQ Behavior” on
page 60
The EMOE pin of the CS493XX is used for two
purposes. It generates clock pulses for the latches,
and it is used in conjunction with EXTMEM to
enable the outputs of the ROM. The first three
rising edges of EMOE are used to latch address
bytes, as shown in the diagram. The fourth low
pulse of EMOE is used to enable the ROM outputs.
When both EXTMEM and EMOE go low, the
EMAD[7:0] pins of the DSP become inputs and
await the data coming from the ROM.
When comparing the memory system in Figure 30,
"External Memory Interface" on page 53 to the
timing diagram of Figure 35, "Autoboot Timing
Diagram" on page 58 there may appear to be a
discrepancy. The timing diagram shows three
address cycles, but there are only two latches in
the illustration of the memory architecture. This
difference is a result of code size limitations. The
application code is guaranteed to fit into a 32
Kilobyte space, which means that only 15 address
bits will actually be used for retrieving code from
the ROM. Thus, the two latches catch the least
significant bytes, and the most significant byte is
dropped.
In autoboot mode, latching the most significant
byte would be perfectly valid since the most
significant bits are guaranteed to be zeros (the
three bytes represent a true 24-bit address).
The flow chart given in Figure 36, "Autoboot
Sequence" on page 59 demonstrates the
interaction required by the microcontroller when
placing the DSP into autoboot mode. The host
must first drive the RESET line low.
After waiting for 175 ms, the application code
should be fully downloaded to the DSP, however
the designer should note that this time is typical
and may vary for each application code. During the
wait period, the host should ignore all INTREQ
behavior (mask the INTREQ interrupt). The host
can then verify that the code has successfully
initialized itself by sending a solicited read
command to the DSP to check for a known default
value. For example, by sending
Rd_Audio_Mgr_Request (0x090003) the host will
receive Rd_Audio_Mgr_Response (0x890003,
0x000000). If the first read attempt returns an
incorrect value, a 5ms wait should b e inserted and
the read should be repeated. If a second invalid
response is read, the entire boot process should
then be repeated. When the number returned
matches the default va lue for the variable read, the
host can be confident that the application is
resident in the DSP and awaiting further
instructions. An application code user’s guide
should be consulted for information about reading
a variable from the part.
Hardware configuration messages are used to
define the behavior of the DSP’s audio ports. A
RESET
ABOOT
EXTMEM
EMOE
EMWR
EMAD7:0 MA23:16 MA15:8 MA7:0 Data7:0
Figure 35. Autoboot Timing Diagram
CS49300 Family DSP
DS339F7 59
Figure 36. Autoboot Sequence
Notes: 1. RESET must be held LOWTrstl.
2. The RD and WR pins must be configured to select a
serial communication mode as defined in the
CS493XX Datasheet. The setup (Trstsu) and hold
(Trsthld) times must be obse rved for the RD , WR, and
AUTOBOOT pins.
3. INTREQ should be ignored during this period. 200 ms
is typical but this time is application code specific and
may be higher. Wait times should be verified by the
designer.
4. The READ_* and WRIT E_ * fu nct ion s ar e
placeholders for the READ_I2C/READ_SPI and
WRITE_I2C/WRITE_SPI functions defined in Section
6.1, “Serial Communication” on page 36.
CORRECT VALUE? N
Y
READ_*(VARIABLE)
RESET(LOW) (NOTE 1)
RESET(HIGH) (NOTE 2)
RELEASE ABOOT
(NOTE 4)
WAIT 5 MS
AUTOBOOT COMPLETE
WRITE_*(HW_CONFIG_MSG,
HW_MSG_SIZE)
(NOTE 4)
WRITE_*(SW_CONFIG_MSG,
SW_MSG_SIZE)
(NOTE 4)
ABOOT(LOW)
WAIT 200 MS (NOTE 3)
WRITE_*(KICKSTART,
MSG_SIZE)
(NOTE 4)
CS49300 Family DSP
60 DS339F7
more detailed description of the diffe rent hardware
configurations can be found in Section 11,
“Hardware Configuration” on page 74.
The software configuration messages are specific
to each application. The software user’s guides
(AN163, AN163x, AN162, AN162x) for each
application code provides a list of all pertinent
configuration messages. Writing the KICKSTART
message to the CS493XX begins the audio
decode process. The KICKSTART message will
also be described in the user’s guide for each
application. Until the KICKSTART has been sent,
the decoder is in a wait state.
8.2.1. Autoboot INTREQ Behavior
It is important to note that ABOOT and INTREQ
are multiplexed on pin 20 of the CS493XX.
Because this pin serves as an input before reset,
and an output after reset, the host should release
the ABOOT line after RESET has gone high. As
shown in Figure 37, "Autoboot INTREQ Behavior"
on page 60, the host must drive ABOOT low
around the rising edge of RESET.
After the host has released the ABOOT line, it will
remain high while the DSP prepares to load code
from the external memory. INTREQ should be
ignored during download, i.e. interrupts should be
masked on the host. The download time will vary
according to the size of the download image and
the frequency of the main DSP clock. The autoboot
sequence is specified to complete within 200 ms
(from the rising edge of RESET). Note: This time
has been tested using the ac3_493263_13.ld
application code release, however other
application code releases MAY take longer than
200mS as they have may an increased image size
and may take longer to initialize all of the internal
state variables. It is up to the designer to verify the
actual times required for each application code in
their system.
RESET
ABOOT
T
rstsu
T
rsthld
Driven Low by Host
Driven Low by CS492X
Download in Progress
Figure 37. Autoboot INTREQ Behavior
CS49300 Family DSP
DS339F7 61
8.3. Decreasing Autoboot Times Using
GFABT Codes (Fast Autoboot)
Instead the host toggling the RESET line while
ABOOT is held low, the host decrease the
Autoboot download time by instead downloading a
special code called “GFABT” (Genesis Fast
Autoboot) which first speeds up the DSP’s core
clock, and then automatically causes the DSP to
Autoboot itself from external ROM.
Basically, the host should perform a normal serial
host boot with one of the GFABT codes (gfabt8.ld,
gfabt6.ld or gfabt4.ld) as described in Section
8.1.1, (with ABOOT held high). Immediately
following the download of the GFABT code, the
DSP will start to act the exact same way as if the
host had toggled the RESET line with ABOOT held
low, only now, the code image held in the external
flash or eprom page will now be downloaded
anywhere from 1.5 to 3 times faster than using
Autoboot, depending on the gfabt code that was
first downloaded.
The normal DSP clock divide factor during
Autoboot is 12 (VCO open loop frequ ency divider).
The gfabt8.ld code changes that divide factor to 8,
the gfabt6.ld code changes it to 6, and the gfabt4.ld
code changes it to 4. Contact your FAE in order to
obtain these gfabt codes.
Some sample data for various autoboot times can
be seen below in Table 11 using the
ac3_pl2_reeq_493264_08.ld application code. It
shows that the autoboot times after downloading
gfabt8.ld, gfabt6.ld, and gfabt4.ld are
approximately 1.5, 2, and 3 times faster than a
standard autoboot. The typical autoboot time
listed in the datasheet of 200 ms will therefore
become 135 ms (200ms/1.5), 100ms (200ms/2),
and 70ms (200/3) with gfabt8, 6, and 4,
respectively.
Open Loop
VCO Standard Autoboot Times GFABT4.LD GFABT6.LD GFABT8.LD
Application
Code Name
(8.3 File Name)
ac3_pl~1.ld dts_6d~1.ld eff_49~1.ld ac3_pl~1.ld ac3_pl~1.ld ac3_pl~1.ld
Application
Code Name
(Long File
Name)
ac3_pl2_
reeq_
493264_
08.ld
dts_6dot1_
reeq_
493264_
04.ld
eff_4932xx
_14.ld
Code Size on
Disk 94 k 94 k 47 k
Code Size in
Bytes 24 k 24 k 12 k
Sample 1 12.5 MHz 98 ms 96 ms 48 ms 34 ms 50 ms 65 ms
Sample 2 12.4 MHz 99 ms 98 ms 50 ms 34 ms 50 ms 67 ms
Sample 3 11.7 MHz 97 ms 96 ms 48 ms 32 ms 50 ms 66 ms
Table 11. Reduced Autoboot Times using GFABT8.LD, GFABT6.LD, and GFABT4.LD on a CS493264-CL
Rev. G DSP
CS49300 Family DSP
62 DS339F7
Figure 38. Fast Autoboot Sequence Using GFABT Codes
Notes: 1. RESET must be held LOWTrstl.
2. It should be noted that mode pins are used
to configure the CS493XX serial
communication mode. The se mode pins are
latched internally on the rising ed ge of reset.
The pins can be set dynamically by a
microprocessor or can be statically pulled
HIGH or LOW. If these pins are driven
dynamically, setup and hold times must be
satisfied as stated in the CS493XX Data
Sheet. More information ab ou t th e fun ction
of the mode pins can be found in the
CS493XX Data Sheet and in Section 6,
“Control” on page 36.
3. Time-out values reflect worst case response
time for the CS493XX. The values shown
may be used for the host’s time-out control
loop.
4. Hardware configuration messages are
covered in Section 6, “Control” on page 36.
Application configuration messages are
covered in each application code user’s
manual.
5. INTREQ should be ignored during this
period. Depending o n which GFABT code is
used, wait times can vary from 135 ms to 70
ms. All actual Autoboot times should be
verified by the designer.
6. The READ_* and WRITE_* functions are
placeholders for the READ_I2C/READ_SPI
and WRITE_I2C/WRITE_SPI function s
defined in Section 6.1, “Serial
Communication” on page 36.
INTREQ LOW? N
Y
WRITE_*(DOWNLOAD_
RESET(LOW) (NOTE 1) RESET(HIGH) (NOTE 2) WAIT 500 µs
BOOT, MSG_SIZE) TIMEOUT AFTER
20MS (NOTE 3)
READ_*(MESSAGE)
MESSAGE == N
Y
BOOTSTART?
WRITE_*(GFABTX.LD FILE,
DOWNLOAD FILE SIZE) EXIT(ERROR)
CORRECT VALUE? N
Y
READ_*(VARIABLE)
(NOTE 4)
WAIT 5 MS
AUTOBOOT COMPLETE
WRITE_*(HW_CONFIG_MSG,
HW_MSG_SIZE)
(NOTE 6)
WRITE_*(SW_CONFIG_MSG,
SW_MSG_SIZE)
(NOTE 6)
WAIT 135 MS, 100 MS,
WRITE_*(KICKSTART,
MSG_SIZE)
(NOTE 6)
OR 70 MS (NOTE 5)
CS49300 Family DSP
DS339F7 63
8.3.1. Design Considerations when
using GFABT Codes
The designer should be aware that the gfabt codes
do not lock the PLL, so therefore the actual time
involved with autobooting is subject to the open
loop VCO frequency. The PLL is only locked when
the command is sent from the host, typically along
with the kickstart command. Also, the designer
should take into account the access time of the
Flash Memory, EPROM, and latches used in their
specific design. While there is a temptation to use
the gfabt4 code which would theoretically minimize
the Autoboot time, the designer should realize that
this may result in the DSP to attempting to
Autoboot too quickly, resulting in clocking times
that exceed that of the specified access times of
particular external memory devices or the
associated latches.
The designer should note that the times listed in
Table 11 were taken from 3 sample CS493264-CL
Rev. G devices and are in no way a guarantee of
the times that your design will achieve as all values
are dependent on the open loop frequency of the
DSP. Furthermore the times listed in Table 11 DO
NOT include the code initialization time (the time
spent after download while the code prepares for
messages). Therefore, the times listed above
should be used as the upper bound on boot time
when using the gfabt codes.
8.4. Internal Boot
Certain applications are stored in the ROM of the
CS493253, CS493254, CS493263 and
CS493264. To enable these applications a special
loader called an internal boot assist program must
be used. This internal boot assist (or IBA) code can
be downloaded using either host boot or autoboot
methods. After the IBA program has been
downloaded, it enables the internally stored
application code. The IBA codes are typically
around 350 bytes in size and hence can easily be
stored in a host controller.
8.5. Application Failure Boot Message
Each piece of application code is specifically
tailored for an individual part in the CS493XX
family. Although it is possible to load a piece of
code into the wrong chip and receive a
BOOT_SUCCESS byte, the code will not initialize
itself. In order to facilitate the debug of designs
which can accept many members of the CS493XX
family, an APPLICATION_FAILURE message is
provided.
As mentioned earlier, the host must wait for at least
5ms after download before sending configuration
messages to the CS493XX. This provides time for
the code to initialize itself. If the INTREQ pin is low
after the download process has completed, the
host should read from the CS493XX. The byte
0xF0 indicates APPLICATION_FAILURE. This
byte informs the host that the applicat ion code was
loaded into an incompatible DSP.
Although most of the messages listed in Tables 9
and 10 are essentially ignored for autoboot, it
should be noted that th e APPLICATION_FAILURE
message is applicable whether host boot or
autoboot is used.
8.6. Resetting the CS493XX
Resetting the CS493XX uses a combination of
software and hardware. To reset the device, a
previous application must ha ve be en do wnloaded.
The flow diagram in Figure 39, "Performing a
Reset" on page 64 shows the procedure for
performing a reset.
The following is a detailed description of a reset
sequence to the CS493XX. All writes and reads
with the CS493XX should follow the protocol given
in Section 6, “Control” on page 36.
1) Reset begins when the host issues a hard reset
and holds the mode pins appropriately (WR,
RD, and PSEL) as described in Section 6,
“Control” on page 36. It is assumed that the
communication protocol is followed for
whichever communication mode is chosen by
the host.
2) The host should then send the message
SOFT_RESET (0x000001). This will reset the
previously downloaded application with all of
the hardware configurations in their default
states. The application code user’s guide for
each application lists those parameters which
are affected by a SOFT_RESET.
3) After waiting 5 ms to allow the downloaded
CS49300 Family DSP
64 DS339F7
application to initialize, the host can send
configuration messages for both hardware and
software configuration.
This method of resetting the DSP is usually
referred to as a “soft reset” even though it involves
toggling the reset pin.
Table 12 lists some possible external memory
configurations for each DSP, in conjunction with
IBA codes stored in the host microcontroller. The
table provides a list of the ROM content, the size of
the combined memory images, the recommended
page size, and the number of discrete pages
required. The examples also include several
figures which present the different ROM
configurations as composite memory images.
The CS49292, CS493102, and CS493112 all have
special memory requirements since they must
have access to external SRAM (70nS or faster)
during the decoding of AAC Multichannel (5.1
Channel) audio. More specifically this SRAM
requirement is ONLY required for AAC application
code which is capable of outputting 5.1 discrete
channels, but is not required of application code
that offers a 2 channel downmixed output.
Also, for the CS49330, there are certain releases
THX Surround EX (5.1 Channel and 7.1 Channel
versions), and THX Ultra2 Cinema (7.1 Channel
version only) application codes that offer additional
all-channel delay, and for this a 1Mbit or 2Mbit,
70nS SRAM is also required. The THX Surround
EX application codes (5.1 Channel or 7.1 Channel)
nor the THX Ultra2 Cinema code do not require
external SRAM. Please refer to the
CS4932X/CS49330 Part Matrix vs. Code Matrix for
more detail about each particular app lication code.
The speed of external ROM or Flash Memory need
only be 330nS (or faster) which stores the
application codes, while the speed of the SRAM
must be 70nS or faster.
8.7. External Memory Examples
8.7.1. Non-Paged Autoboot Memory
The most rudimentary memory design discussed
above is the non-paged memory. In a non-paged
design, the DSP can only access one item in
memory which could be either a single full
download code load. The memory image given in
Figure 39. Performing a Reset
WRITE_*
WRITE_* (SOFTRESET,
MSG_SIZE)
RESET(LOW) (NOTE 1)
RESET(HIGH) (NOTE 2)
WAIT 500 µs
WAIT 5 ms (NOTE 3)
(CONFIGURATION_MESSAGES,
CONFIG_MSG_SIZE)
(NOTE 4)
Notes: 1. RESET must be held LOW for t rstl.
2. It should be noted that mo de pins are used to configure
the CS493XX communication mode. These mode pins
are latched internally on the rising edge of reset a nd
can be set dynamically by a microproce ssor or can be
statically pulled HIGH or LOW. If these pins a re drive n
dynamically, setup and hold times must be satisfied as
stated in the CS493XX Datasheet. More information
about the function of the mo de pins can be found in the
CS493XX Datasheet and in Section 6, “Control” on
page 36.
3. 5 ms is typical but this time is application code specific
and may be as high as 10 ms. Wait times should be
verified by the de sig ner.
4. Configuration messages determine both hardware and
software configuration. Hardware configurations are
described in Section 11 of this manual. Software
application configuration messages are described in
the Application Code User’s Guide for the code being
used.
CS49300 Family DSP
DS339F7 65
Figure 40 is an example of a non-paged memory
image.
Only 15 of the 16 output bits of the address latches
would be connected to address bits A0-A14 of the
external ROM, in order to have access to the single
application code stored in the 32 kilobyte non-
paged memory. The host is completely isolated
from memory accesses in this situation. Once the
hardware has been designed, the DSP itself will be
responsible for all communication with the ROM.
8.7.2. 32 Kilobyte Paged Autoboot
Memory
An external memory architecture which is paged
on 32 Kilobyte boundaries offers the higher end
system the ability to store several full download or
IBA application codes in each 32 Kilobyte page.
Figure 41 shows an example of a 32 Kilobyte
paged memory image for a the premium 6.1/7.1
channel system describe in Table 12 above.
ROM Content Image Size Number of Pages
Required IBA Code(s)
Stored in Host Type of Design
CS493254
N/A, All IBA codes are loaded
using Host Boot technique N/A, All IBA codes
are loaded using
Host Boot technique
N/A, All IBA codes
are loaded using
Host Boot technique
Dolby Digital with
PL II,
C.O.S.
Dolby Digital with
Pro Logic II 5.1
Channel System
Dolby Digital with PLII +
Cinema Re-EQ,
HDCD
32 + 32 = 64 Kbytes 2 C.O.S. Enhanced
Dolby Digital with
Pro Logic II 5.1
Channel System
CS493264
N/A, All IBA codes are loaded
using Host Boot technique N/A, All IBA codes
are loaded using
Host Boot technique
N/A, All IBA codes
are loaded using
Host Boot technique
Dolby Digital with
PL II,
C.O.S., DTS
Enhanced
Dolby Digital/
DTS 5.1 Channel
System
Dolby Digital with C.E.S., MPEG
Multichannel with C.E.S., DTS
with C.E.S., MP3
32 * 4 pages =
128 Kbytes 4 C.O.S. Basic 6.1
Channel System
Dolby Digital with PLII with
C.E.S., MPEG Multichannel with
PLII, DTS-ES, DTS Neo:6
32 * 4 pages =
128 Kbytes 4 C.O.S. Enhanced 6.1
Channel System
Dolby Digital with PLII with
C.E.S., MPEG Multichannel with
PLII, DTS-ES with PLII, DTS
Neo:6, HDCD, LOGIC7, MP3,
Virtual Dolby Digital with VMAx
VirtualTheater
32 * 8 =
256 Kbytes 8 C.O.S. Premium
6.1/7.1 Channel
System
CS493292
Dolby Digital with PLII with
C.E.S., MPEG Multichannel with
PLII, DTS-ES, DTS Neo:6,
HDCD, SRS Circle Surround II,
C.O.S., MPEG-2: AAC
32 * 8 =
256 Kbytes 8 N/A, No IBA
Codes not avail-
able for the
CS493292
Premium 6.1/7.1
Channel System
with AAC
Support
Table 12. Memory Requirements for Example 5.1, 6.1 and 7.1 Channel Systems
Figure 40. Non-Paged Memory
0x00000
0x0FFFF
Dolby Digital with
Pro Logic II Code
or
another F ull Download Co de
CS49300 Family DSP
66 DS339F7
The flow diagram given in Figure 36 d emonstrate s
the interaction required by the microcontroller
during autoboot. After placing the decoder into a
reset state, the host selects the page in memory
containing first code by driving uC15 to a low state.
The host also drives ABOOT low and holds it in a
low state until the rising edge of RESET to initiate
autoboot. As noted in the autoboot section, the
ABOOT pin should be connected to an open-drain
output of the microcontroller so as to allow the
specified pull-up resistor to generate the high
value. The open-drain driver is required because
the DSP will begin using the pin as an output after
a successful download (INTREQ and ABOOT are
multiplexed on the same pin).
After waiting for 175 ms, the download should have
completed. During the wa it pe riod, the h ost shou ld
ignore all INTREQ behavior (mask the INTREQ
interrupt). The host can then verify that the code
has successfully initialized itself by reading a
variable from the application and checking the
returned value against the default value. Any
variable can be used for the verification step, but a
robust design will select a variable whose value is
neither all 0’s nor all 1’s. If the first read attempt
returns an incorrect value, a 5 ms wait should be
inserted and the read should be repeated. If a
second invalid number is read, the entire boot
process should be repeated. When the number
returned matches the default value for the variable
read, the host knows that the application is
resident in the DSP and awaiting further
instruction. Please see Section 8.2, “Autoboot” on
page 57 for more information.
For systems that would prefer to store all
application codes in an external parallel Flash
Memory (vs. a OTP EPROM) in order to realize a
“field-upgradable” system, please contact
dsp_support@crystal.cirrus.com for information
about how to control the GPIO pins of the DSP via
messaging to the SPI or I2C port.
8.8. CDB49300-MEMA.0
The CDB49300-MEMA.0 is an external memory
adapter card designed for use with the
CDB4923/CDB4930 REV-A.0 Evaluation Board.
The schematic for the CDB49300-MEMA.0 is
shown in Figure 42. This board is an example of
one possible external memory configuration.
In addition to autobooting from external EPROM,
certain application codes require real-time access
to external SRAM, such as decoding of AAC
Multichannel streams, which have a 5.1 channel
output. These applications require that the DSP
has real-time access to 70nS (or faster) 32
Kilobyte SRAM. The 128 Kilobyte SRAM on the
CDB49300-MEMA.0 is made accessible by the
DSP when the host drives uC18 high . The external
256 Kilobyte EPROM is accessible to the DSP
when the host controller drives uC18 low. The with
uC15, uC16, and uC17 lines are used to page
between the various code images.
Address line uC15, uC16, and
uC17 used for paging
MPEG Multichannel with
Pro Logic II
Dolby Digital with
Pro Logic II with Cirrus
Extra Surround
0x00000
0x07FFF
0x08000
0x0FFFF
0x10000
0x17FFF DTS-ES Extended Surround
0x18000
0x1FFFF DTS-ES Neo:6
0x20000
0x27FFF HDCD
0x28000
0x2FFFF LOGIC7
0x30000
0x37FFF MP3
0x38000
0x3FFFF
Virtual Dolby Digital with
VMAx VirtualTheater
Figure 41. Example Contents of a Paged 32 Kilo-
bytes External M emory (T o tal 25 6 Kil ob y te s)
CS49300 Family DSP
DS339F7 67
#RESET
EMAD7
EMAD5
EMAD3
A16
A15
A14
A13
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
A[16:0]
A13
A0 A13
A0 A8
A3
A9
A1
A1
A4
A5
A4
A15
A2
A13 A10
A9
A9
A8
A6
A3
A7
A0
A5 A8
A12
A2
A15
A11
A6 A14
A12
A4
A14
A3
A6
A7
A10
A12 A11
A5
A7
A1 A14
A2
A10
A11
A16
EMAD7
EMAD2 EMAD1
EMAD0
EMAD2
EMAD6
EMAD4
EMAD5
EMAD1
EMAD[7:0]
EMAD0
EMAD6
EMAD3
EMAD4
EMAD5
EMAD0
EMAD7
EMAD2
EMAD4
EMAD1
EMAD6
EMAD3
D5
D1
D3
D6
D6
D1
D2
D6
D3
D2
D7
D2
D5
D3
D5
D1
D4
D7
D0
D0
D4
D7
D0
D4
uC18
#ABOOT
#EXTMEM
uC18
uC16
uC15
#EMOE#EMOE #EMOE
EMAD[7:0]
uC15
uC17
#EMOE
#ABOOT
#EXTMEM #EMWR
#EMWR
uC17
#EXTMEM
uC16
uC18
#uC18
#EMWR
#uC18
#EXTMEM
EMAD[7:0]
D[7:0]
D[7:0]
D[7:0]
#EMWR
+3.3V
+3.3V
+3.3V
+3.3V
+3.3V +3.3V
+3.3V
+3.3V
+3.3V
+3.3V
C4
0.1uF
C9
0.1uF
C3
0.1uF
U4
74LVC574
12
13
14
15
16
17
18
19
11
2
3
4
5
6
7
8
9
101 20
Q7
Q6
Q5
Q4
Q3
Q2
Q1
Q0
CK
D0
D1
D2
D3
D4
D5
D6
D7
GNDOE VCC
C1
0.1uF
R13
49.9
C5
0.1uF
R19
0
R12
49.9
R17
49.9
R18
49.9
U5
CY7C109V33
19
20
21
22
23
24
25
26
9
10
11
12
13
14
15
16
17
18
7
6
54
3
2
1
32
31
30
29
28
8
27
A1
A0
D0
D1
D2
GND
D3
D4
NC
A16
A14
A12
A7
A6
A5
A4
A3
A2
A15
CE2
WE
A13
A8
A9
A11
OE
A10
CE1
D7
D6
VCC
D5
R15
49.9
R14
49.9
R11
49.9
C7
0.1uF
R10
49.9
U3
74LVC574
12
13
14
15
16
17
18
19
11
2
3
4
5
6
7
8
9
101 20
Q7
Q6
Q5
Q4
Q3
Q2
Q1
Q0
CK
D0
D1
D2
D3
D4
D5
D6
D7
GNDOE VCC
+
C6
47uF
U2
74LVC574
12
13
14
15
16
17
18
19
11
2
3
4
5
6
7
8
9
101 20
Q7
Q6
Q5
Q4
Q3
Q2
Q1
Q0
CK
D0
D1
D2
D3
D4
D5
D6
D7
GNDOE VCC
R5
49.9
R3
49.9
R9
49.9
R7
49.9
U1
AT27LV020A
5
6
7
8
9
10
11
12
30
2
3
29
28
4
25
23
26
27
13
14
15
17
18
19
20
21
22
24
31
1
32
16
A7
A6
A5
A4
A3
A2
A1
A0
A17
A16
A15
A14
A13
A12
A11
A10
A09
A08
O0
O1
O2
O3
O4
O5
O6
O7
CE
OE
PGM
VPP
VCC
GND
R4
49.9
R8
49.9
R6
49.9
C8
0.1uF
U6A
74LVC125
2 3
1
P1
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
U6E
74LVC125
7 14
U6D
74LVC125
12 11
13
R2
10K
R1
10K
R16
10K
U7
74VHC245
2
3
4
5
6
7
8
9
19
1
18
17
16
15
14
13
12
11
20
10
A1
A2
A3
A4
A5
A6
A7
A8
1G
DIR
Y1
Y2
Y3
Y4
Y5
Y6
Y7
Y8
VCC
GND
C2
0.1uF
Figure 42. CDB49 300-MEM A.0 Daugh ter Card fo r the CDB4923/30-REV-A.0
CS49300 Family DSP
68 DS339F7
9. HARDWARE CONFIGURATION
After download or soft reset, and before
kickstarting the application (please see the Audio
Manager in the Application Messaging Section of
any Application Code User’s Guide for more
information on kickstarting), the host has the option
of changing the default hardware configuration.
Hardware configuration messages are used to
physically reconfigure the hardware of the audio
decoder, as in enabling or disabling address
checking for the serial communication port.
Hardware configuration messages are also used to
initialize the data type (i.e., PCM or compressed)
and format (e.g., I2S, left justified, etc.) for digital
data inputs, as well as the data format and clocking
options for the digital output port.
In general, the hardwa re configu ration ca n only be
changed immediately after download or after soft
reset. However, some applications provide the
capability to change the input ports without
affecting other hardware configurations after
sending a special Application Restart message
(please see the Audio Manager in any Application
Code User’s Guide to determine whether the
Application Restart message is supported).
Section 11.4 at the end of this chapter will describe
how to construct a hardware configuration
message.
CS49300 Family DSP
DS339F7 69
10. DIGITAL INPUT & OUTPUT
The CS493XX supports a wide variety of data input
and output mechanisms through various input and
output ports. Hardware availability is entirely
dependent on whether the software application
code being used supports the required mode. This
data sheet presents most of the modes available
with the CS493XX hardware. This does not mean
that all of the modes are available with any
particular piece of application code. The
application code user’s guide for the particular
code being used should be referenced to
determine if a particular mode is supported. In
addition if a particular mode is desired that is not
presented, please contact your sales
representative as to its availability.
10.1. Digital Audio Formats
This subsection will describe some common audio
formats that the CS493XX supports. It should be
noted that the input ports use up to 24-bit PCM
resolution and 16-bit compressed data word
lengths. The output port of the CS493XX provides
up to 24-bit PCM resolution.
10.1.1.I2S
Figure 43, "I2S Format" on page 69 shows the I2S
format. For I2S, data is presented most significant
bit first, one SCLK delay after the transition of
LRCLK and is valid on the rising edge of SCLK. For
the I2S format, the left subframe is present ed when
LRCLK is low and the right subframe is presented
when LRCLK is high. SCLK is required to run at a
frequency of 48Fs or greater on the input ports.
10.1.2.Left Justified
Figure 44 shows the left justified format with a
rising edge SCCLK. Data is presented most
significant bit first on the first SCLK after an LRCLK
transition and is valid on the rising edge of SCLK.
For the left justified format, the left subframe is
presented when LRCLK is high and the right
subframe is presented when LRCLK is low. The
left justified format can also be programmed for
data to be valid on the falling edge of SCLK. SCLK
is required to run a t a frequency of 48Fs or grea ter
on the input ports.
10.1.3.Multichannel
Figure 45 shows the multichannel format. In this
format up to 6 channels of audio are presented on
one data line with M bits per channel. Channels 0,
2, and 4 are presented while the LRCLK is high
and channels 1, 3, 5 are presented while the
LRCLK is low. Data is valid on the rising edge of
SCLK and is presented most significant bit first. It
should be noted that in the multichannel modes the
SCLK rate must be greater than the number o f bits
per channel multiplied by the number of channels.
In the example SCLK must be greater than M * 6.
Because each of the ports is fully configurable
(SCLK polarity, LRCLK polarity, Word Width,
SCLK Rate) not all modes have been presented.
LRCK
SCLK
SDATA MSB LSB
Left Right
MSB LSB
Figure 43. I2S Format
LRCK
SCLK
SDATA MSB LSB
Left Right
MSB LSB MSB
Figure 44. Left Justified Format (Rising Edge Valid SCLK)
CS49300 Family DSP
70 DS339F7
10.2. Digital Audio Input Port
The digital audio input port, or DAI, is used for both
compressed and PCM digital audio data input. In
addition this port supports a special clocking mo de
in which a clock can be input to directly drive the
internal 33 bit counter. Table 13, “Digital Audio
Input Port,” on page 70 shows the pin names,
mnemonics and pin numbers associated with the
DAI.
The DAI is fully configurable including support for
I2S, left justified and multichannel formats. In
addition the DAI can be programmed for slave
clocks, where LRCLKN1 and SCLKN1 are inputs,
or master clocks, where LRCLKN1 and SCLKN1
are outputs. In order for clocks to be master, the
internal PLL must be used.
STCCLK2 can also be programmed to drive the
internal 33 bit counter. This counter would typically
be driven by a 90kHz clock. The internal cou nter is
used by certain application code for audio/video
synchronization purposes.
10.3. Compressed Data Input Port
The compressed data input port, or CDI, can be
used for both compressed and PCM data input.
Table 14 shows the mnemonic, pin name and pin
number of the pins associated with the CDI port on
the CS493XX.
The CDI is fully configurable including support for
I2S, left justified and multichannel formats. The CDI
can also be programmed for slave clocks, where
LRCLKN2 and SCLKN2 are inputs, or master
clocks, where LRCLKN2 and SCLKN2 are outputs.
In order for clocks to be ma stered, the internal PL L
must be used.
In addition the CDI can be configured for bursty
compressed data input. Bursty audio delivery is a
special format in which only clock (CMPCLK) and
data (CMPDAT) are used to deliver compressed
data to the CS493XX (i.e. no frame clock or
LRCLK). A third line, CMPREQ, is used to request
more data from the host. It is an indicator that the
CS493XX internal FIFO is low on data and can
accept another burst. Typically this mode is used
for compressed data delivery where asynchronous
data transfer occurs in the system, i.e. in a system
such as a set-top box or HDTV. PCM data can not
be presented in this mode since data is interprete d
as a continuous stream with no word boundaries.
10.4. Byte Wide Digital Audio Data Input
Two types of byte wide parallel delivery are
supported by the CS493XX. If using one of the
parallel control modes described in Section 6.2,
“Parallel Host Communication” on page 44, then
the parallel interface can also be used for
Pin Name Pin Description Pin Number
SDATAN1
STCCLK2 Serial Data In
Secondary STC clock 22
SCLKN1 Serial Bit Clock 25
LRCLKN1 Frame Clock 26
Table 13. Digital Audio Input Port
LRCLK
SCLK
SDATA MSB LSB
M Clocks
Per Channel
MSB LSB
M Clocks
Per Channel M Clocks
Per Channel
MSB LSB
M Clocks
Per Channel
MSB LSB
M Clocks
Per Channel
MSB LSB
M Clock s
Per Channel
MSB LSB MSB
Figure 45. Multichannel Format
Pin Name Pin Description Pin Number
SDATAN2
CMPDATA Serial Data In
Compressed Data In 27
SCLKN2
CMPCLK Serial Bit Clock 28
LRCLKN2
CMPREQ Frame Clock
Data Request Out 29
Table 14. Compressed Data Input Por t
CS49300 Family DSP
DS339F7 71
delivering data. If using I2C or SPI control, then
parallel delivery can still be used using CMPCLK
and GPIO[7:0].
10.4.1.Parallel Delivery with Parallel
Control
If using the Intel or Motorola Para llel host interface
mode, the system designer can also choose to
deliver data through the byte wide parallel port.
The delivery mechanism is identical to that
discussed in Section 6.2, “Parallel Host
Communication” on page 44.
The compressed data input register (CMPDAT)
receives bytes of data when the host interface
writes to address 11b (A1 and A0 are both high).
The host should check level of the Compressed
Data FIFO before sending data. The CS493XX has
two means of indicating the Compressed Data
FIFO level. The MFB bit in the Host Control
Register is one indicator of the Compressed Data
FIFO level. The MFB bit remains low until the FIFO
threshold has been reached. The alternative is to
use the CMPREQ pin of the CS493XX. The
CMPREQ pin also remains low until the FIFO
threshold has been reached. The host has the
option of using either CMPREQ or the MFB bit.
Data should be delivered to the CS493XX in blocks
of data. Before each block is delivered, the host
should check the MFB bit (or the CMPREQ pin). If
the MFB bit (CMPREQ) is low, then the host can
deliver a block of data one byte at a time. If the
MFB bit (CMPREQ) is high, no more data should
be sent to the CS493XX. Once the MFB bit
(CMPREQ) has gone low again, the host may send
another block of compressed audio data.
During delivery of a block of data the FIFO
threshold should not be checked. In other words
the FIFO indicators are level sensitive and indicate
that a block can be delivered when they are low.
They may return high during the data delivery.
When this happens there is still room for the
remaining bytes of the block.
The PCM data input register (PCMDAT) receives
bytes of data when the host interface writes to
address 10b (A1 high, A0 low). The MFC bit in the
Host Control Register is an indicator of the PCM
FIFO level. The MFC bit remains low until the FIFO
threshold has been reached.
The PCMRST bit of the CONTROL register
provides absolute software/hardware
synchronization by initializing the input channel to
uniquely recognize the first write to the byte-wide
PCMDATA port. Toggling PCMRST high and low
informs the DSP that the next sample read from
the PCMDATA port is the first sample of the left
channel. In this fashion, the CS493XX can
translate successive byte writes into a variable
number of channels with a variable PCM sample
size. In the most simple case, the CS493XX can
receive stereo 8-bit PCM one byte at a time with
the internal DSP assigning the first 8-bit write (after
PCMRST) to the left channel and the second 8-bit
write to the right channel. For 24-bit PCM, it
assigns the first three 8-bit writes (after PCMRST)
to the left channel and the next three writes to the
right channel. Before starting PCM transfer, or to
initiate a new PCM transfer, the PCMRST bit must
be toggled as described above to insure data
integrity.
Data must be delivered to the CS493XX in blocks
of data. The block size is set through a hardware
configuration message. Before each block is
delivered, the host should check the MFC bit. If the
MFC bit is low, then the host can deliver a block of
data one byte at a time. If the MFC bit is high, no
more data should be sent to the CS493XX. Once
the MFC bit has gone low again, the host may send
another block of PCM audio data. The MFC bit is
FIFO level sensitive. In other words, it may change
during the transfer of a block. The host should
complete the block transfer and ignore th e MFC bit
until the block transfer is complete.
10.4.2.Parallel Delivery with Serial
Control
When using I2C or SPI control, bytewide delivery of
data can still be achieved using
SCLKN2(CMPCLK) and GPIO[8:0]. In this mode
the bytewide parallel data is clocked into the part
on the transition of CMPCLK.
In this mode CMPREQ can be used as the FIFO
threshold indicator. When CMPREQ is low it
means that the CS493XX can receive another
block of data.
CS49300 Family DSP
72 DS339F7
10.5. Digital Audio Output Port
The Digital Audio Output port, or DAO, is the port
used for digital output from the DSP. Table 15
shows the signals associated with the DAO. As
with the input ports the clocks and data are fully
configurable via hardware configuration.
MCLK is the master clock and is firmware
configurable to be either an input or an output. If
MCLK is to be used as an output, the internal PLL
must be used. As an output MCLK can be
configured to provide a 128Fs, 256Fs or 512Fs
clock, where Fs is the output sample rate.
SCLK is the bit clock used to clock data out on
AUDATA0, AUDATA1, AUDATA2 and AUDATA3.
LRCLK is the data framing clock whose frequency
is typically equal to the sampling frequency. Both
LRCLK and SCLK can be configured as either
inputs (Slave mode) or outputs (Master mode).
When LRCLK and SCLK are configured as inputs,
MCLK is a don’t care as an input. When LRCLK
and SCLK are configured as outputs, they are
derived from MCLK. Whether MCLK is configured
as an input or an output, an internal divider from
the MCLK signal is used to produce LRCLK and
SCLK. The ratios shown in Table 16 give the
possible SCLK values for different MCLK
frequencies (all values in terms of the sampling
frequency, Fs).
AUDAT0 is configurable to provide six, four, or two
channels. AUDATA1, AUDATA2 and AUDATA3
can both output two channels of data. Typically the
AUDATA0, AUDATA1, AUDATA2 and AUDATA3
outputs are used in left justified, I2S or right
justified modes. AUDATA0, AUDATA1 and
AUDATA2 are used for 5.1 output, presenting all
six channels of surround sound (Left, Center,
Right, Left Surround, Right Surround and
Subwoofer).
AUDATA3 can be used with AUDATA0, AUDATA1
and AUDATA2 to support 7.1 output. Alternatively
AUDATA3 can be used for dual zone support.
AUDATA3 is multiplexed with the XMT958 output
so only one can be used at any one time.
Table 17 shows the mapping of DAO channels to
actual outputs when not in a multichannel mode.
Pin Name Pin Description Pin Number
AUDATA3,
XMT958 Serial Data Out
IEC60958 Transmitter 3
AUDATA2 Serial Data Out 39
AUDATA1 Serial Data Out 40
AUDATA0 Serial Data Out 41
LRCLK Frame Clock 42
SCLK Serial Bit Clock 43
MCLK Master Clock 44
Table 15. Digital Audio Output Port
MCLK
(Fs)
SCLK (Fs)
32 48 64 128 256 512
128 X X
384** X X X
256 X X X X
512 X XXXX
** For MCLK as an input only
Table 16. MCLK/SCLK Master Mode Ratios
DAO_Channel Subframe Signal
0 Left AUDATA0
1 Right AUDATA0
2 Left AUDATA1
3 Right AUDATA1
4 Left AUDATA2
5 Right AUDATA2
6 Left AUDATA3
7 Right AUDATA3
Table 17. Output Channel Mapping
CS49300 Family DSP
DS339F7 73
Please consult the application code user’s guides
to determine what modes are supported by the
application code being used.
10.5.1.IEC60958 Output
The XMT958 output is shared with the AUDATA3
output so only one can be used at any one time.
The XMT958 output provides a CMOS level bi
phase encoded output. The XMT958 function can
be internally clocked from the PLL or from an
MCLK input if MCLK is 256Fs or 512Fs. All
channel status information can be used when
using software which supports this functionality.
This output can be used for either 2 channel PCM
output or compressed data output in accordance
with IEC61937. To be fully IEC60958 compliant
this output would need to be buffered through an
RS422 device or an optocoupler as its outputs are
only CMOS. Please consult software user’s guide
to determine if this pin is supported by the
download code being used.
CS49300 Family DSP
74 DS339F7
11. HARDWARE CONFIGURATION
After download or soft reset, and before
kickstarting the application (please see the Audio
Manager in the Application Messaging Section of
any application code user’s guide for more
information on kickstarting), the host has the option
of changing the default hardware configuration.
Hardware configuration messages are used to
physically reconfigure the hardware of the audio
decoder, as in enabling or disabling address
checking for the serial communication port.
Hardware configuration messages are also used to
initialize the data type (i.e., PCM or compressed)
and format (e.g., I2S, Left Justified, Parallel, or
Serial Bursty) for digital data inputs, as well as the
data format and clocking options for the digital
output port.
In general, the hardware config uration can only be
changed immediately after download or after soft
reset. However, some applications provide the
capability to change the input ports without
affecting other hardware configurations after
sending a special Application Restart message
(please see the Audio Manager in any Application
Code User’s Guide to determine whether the
Application Restart message is supported).
Serial digital audio data bit placement and sample
alignment is fully configurable in the CS493XX
including left justified, right justified, delay bits or
no delay bits, variable sample word sizes, variab le
output channel count, and programmable output
channel pin assignments and clock edge polarity to
integrate with most digital audio interfaces. If a
mode is needed which is not presented, please
consult your sales representative as to its
availability.
11.1. Address Checking
When using one of the serial communication
modes, I2C or SPI, as discussed in Section 6.1,
“Serial Communication” on page 36, it is necessary
to send a 7-bit address along with a read/write bit
at the start of any serial transaction. By default,
address checking is disabled in the CS493XX.
See below for how to ena ble address checking.
The following 4-word hex message configures the
address checking circuitry of the CS493XX: It
should be noted that this will allow the host to
enable address checking and change the address
of the device. If address checking disabled is
acceptable, then these messages do not need to
be sent.
0x800252
0x00FFFF
0x800152
0xHH0000
In the last word the following bits should replace
HH:
Bits 23:17 - New Address to use for checking (if
enabling address checking)
Bit 16 - 1 = Address checking on
0 = Address checking off
11.2. Input Data Hardware
Configuration
Both data format (I2S, Left Justified, Parallel, or
Serial Bursty) and data type (compressed or PCM)
are required to fully define the input port’s
hardware configuration. The DAI and the CDI are
configured by the same group of messages since
their configurations are interrelated. The naming
convention of the input hardware configuration is
as follows:
INPUT A B C D
where A, B, C and D are the parameters used to
fully define the input port. The parameters are
defined as follows:
A - Data Type
B - Data Format (This is a don’t care for parallel
modes of data delivery)
C - SCLK Polarity
D - FIFO Setup (only valid for parallel modes of
data delivery)
The following tables show the different values for
each parameter as well as the hex message that
needs to be sent. When creating the hardware
configuration message, only one hex message
should be sent per parameter. It should be noted
that the entire B parameter hex message must be
sent, even if one of the input ports has been
defined as unused by the A parameter.
CS49300 Family DSP
DS339F7 75
A Value Data Type Hex
Message
0
(default) DAI - PCM
CDI - Compressed 0x800210
0x3FBFC0
0x800110
0x80002C
1 DAI - PCM and Compressed
CDI - Unused 0x800210
0x3FBFC0
0x800110
0xC0002C
2DAI - Unused
CDI - PCM 0x800210
0x3FBFC0
0x800110
0x800020
3DAI - PCM
CDI - Bursty Compressed (for
Broadcast-based Application
Codes Only)
0x800210
0x003FC0
0x800110
0x0E002C
4DAI - Multichannel PCM
(for Post-Processing Codes that can
accept 2, 4 or 6 channels on one line)
CDI - PCM
0x800210
0x3FBFC0
0x800110
0x80002C
5DAI - PCM
CDI - Multichannel PCM
(for Post-Processing Codes that can
accept 2, 4 or 6 channels on one line)
0x800210
0x3FBFC0
0x800110
0x800025
6DAI - PCM
CDI - Not Used
Parallel Port - Compressed
(FIFO B)
(for Broadcast-based application codes
only)
0x800210
0x003FC0
0x800110
0x0E002B
7 DAI - Not Used
CDI - PCM
Parallel Port - Compressed
(FIFO B)
(for Broadcast-based application codes
only)
0x800210
0x003FC0
0x800110
0x0E0023
Table 18. Input Data Type Configuration
(Input Parameter A)
8DAI - Not Used
CDI - Not Used
Parallel Port - PCM (FIFO C)
and Compressed (FIFO B) with
Intel or Motorola Parallel Host
Control
(for Broadcast-based application codes
only)
0x800210
0x003FC0
0x800110
0x0E0013
9 DAI - Not Used
CDI - Not Used
Parallel Port - Compressed
(FIFO B) with I2C or SPI
Serial Control
0x800210
0x003FC0
0x800110
0x0E0002
0x800118
0x000800
10 DAI - Not Used
CDI - Not Used
Parallel Port - PCM (FIFO C)
with I2C or SPI Serial Control
0x800210
0x003FC0
0x800110
0x0E0010
0x800118
0x000800
B Value Data Format Hex
Message
0
(default) PCM - I2S 24-bit
Compressed - I2S 16-bit
(Compressed meaning any type of
compressed data such as IEC61937-
packed AC-3, DTS, MPEG
Multichannel, AAC or MP3 elementary
stream data from a DVD or IEC60958-
packed elementary stream DTS data
from a DTS-CD)
0x800217
0x8080FF
0x80021A
0x8080FF
0x800117
0x011100
0x80011A
0x011900
1 PCM - Left Justified 24-bit
Compressed - Left Justified
16-bit
(Compressed meaning any type of
compressed data such as IEC61937-
packed AC-3, DTS, MPEG
Multichannel, AAC or MP3 elementary
stream data from a DVD or IEC60958-
packed elementary stream DTS data
from a DTS-CD)
0x800217
0x8080FF
0x80021A
0x8080FF
0x800117
0x001000
0x80011A
0x001800
Table 19. Input Data Format Configuration
(Input Parameter B)
A Value Data Type Hex
Message
Table 18. Input Data Type Configuration
(Input Parameter A) (Continued)
CS49300 Family DSP
76 DS339F7
2PCM - I2S 24-bit
Multichannel PCM (6 Channel)
- Left Justified 24-bit PCM
(for Post-Processing Codes that can
accept 6 channels on one line like
THX Surround EX application code)
0x800217
0x8080FF
0x80021A
0x8080FF
0x800117
0x0048C0
0x80011A
0x0119C0
22 PCM - I2S 24-bit
Multichannel PCM (2 Channel)
- Left Justified 24-bit PCM
(used only by special post-processing
application codes)
0x800217
0x8080FF
0x80021A
0x8080FF
0x800117
0x0018C0
0x80011A
0x0119C0
24 PCM - I2S 24-bit
Multichannel PCM (4 Channel)
- Left Justified 24-bit PCM
(used only by special post-processing
application codes)
0x800217
0x8080FF
0x80021A
0x8080FF
0x800117
0x0030C0
0x80011A
0x0119C0
3 PCM - Left Justified 24-bit
Multichannel PCM (6 Channel)
- Left Justified 24-bit
(for Post-Processing Codes that can
accept 6 channels on one line like
THX Surround EX application code)
0x800217
0x8080FF
0x80021A
0x8080FF
0x800117
0x0048C0
0x80011A
0x0018C0
32 PCM - Left Justified 24-bit
Multichannel PCM (2 Channel)
- Left Justified 24-bit
(used only by special post-processing
application codes)
0x800217
0x8080FF
0x80021A
0x8080FF
0x800117
0x0018C0
0x80011A
0x0018C0
34 PCM - Left Justified 24-bit
Multichannel PCM (4 Channel)
- Left Justified 24-bit
(used only by special post-processing
application codes)
0x800217
0x8080FF
0x80021A
0x8080FF
0x800117
0x0030C0
0x80011A
0x0018C0
B Value Data Format Hex
Message
Table 19. Input Data Format Config uration
(Input Parameter B) (Continued)
4-6 Not Used
7PCM - I2S 24-bit
Multichannel PCM (6 Channel)
- Left Justified 20-bit
(used by standard post-processing
application codes like THX Surround
EX)
0x800217
0x8080FF
0x80021A
0x8080FF
0x800117
0x003CC0
0x80011A
0x0119C0
72 PCM - I2S 24-bit
Multichannel PCM (2 Channel)
- Left Justified 20-bit
(used only by special post-processing
application codes)
0x800217
0x8080FF
0x80021A
0x8080FF
0x800117
0x0014C0
0x80011A
0x0119C0
74 PCM - I2S 24-bit
Multichannel PCM (4 Channel)
- Left Justified 20-bit
(used only by special post-processing
application codes)
0x800217
0x8080FF
0x80021A
0x8080FF
0x800117
0x0028C0
0x80011A
0x0119C0
8PCM - Left Justified 24-bit
Multichannel PCM (6 Channel)
- Left Justified 20-bit
(for Post-Processing Codes that can
accept 6 channels on one line like
THX Surround EX application code)
0x800217
0x8080FF
0x80021A
0x8080FF
0x800117
0x003CC0
0x80011A
0x0018C0
82 PCM - Left Justified 24-bit
Multichannel PCM (2 Channel)
- Left Justified 20-bit
(used only by special post-processing
application codes)
0x800217
0x8080FF
0x80021A
0x8080FF
0x800117
0x0014C0
0x80011A
0x0018C0
B Value Data Format Hex
Message
Table 19. Input Data Format Configuration
(Input Parameter B) (Continue d)
CS49300 Family DSP
DS339F7 77
11.2.1. Input Configuration
Considerations
1) 24-bit PCM input requires at least 24 SCLKS
per sub-frame. The DSP always uses 24-bit
resolution for PCM input. Systems having less
than 24-bit resolution will not have a problem
as the extra bits taken by the DSP will be under
the noise floor of the input signal for left justified
and I2S formats. For compressed input, data is
always taken in 16 bit word lengths.
2) If the clocks to the audio ports are known to be
corrupted, such as when a S/PDIF receiver
goes out of lock, the DSP should undergo an
application restart (if applicable), soft reset or
hard reset. All three actions will result in the
input FIFO being reset. Failure to do so may
result in corrupted data being latched into the
input FIFO and may result in corrupted data
being heard on the outputs. This is not an issue
when compressed data is being delivered, as it
has sync words embedded in the stream which
the DSP can lock to, but only when PCM data
is being delivered. Certain application codes
that are capable of processing PCM may now
have a special feature called “PCM
Robustness” which does alleviate the above
problem, however you should still follow the
above recommendation.
84 PCM - Left Justified 24-bit
Multichannel PCM (4 Channel)
- Left Justified 20-bit
(used only by special post-processing
application codes)
0x800217
0x8080FF
0x80021A
0x8080FF
0x800117
0x0028C0
0x80011A
0x0018C0
C Value SCLK Polarity (Both CDI &
DAI Port) Hex
Message
0
(default) Data Clocked in on Rising
Edge 0x800217
0xFFFFDF
0x80021A
0xFFFFDF
1 Data Clocked in on Falling
Edge 0x800117
0x000020
0x80011A
0x000020
Table 20. Input SCLK Polarity Configuration
(Input Parameter C)
B Value Data Format Hex
Message
Table 19. Input Data Format Config uration
(Input Parameter B) (Continued)
D Value
FIFO Size & Blocksize (no
default - only applicable to
parallel delivery modes) Hex
Message
1Compressed FIFO B Size -
6kbyte
Blocksize - up to 2kbyte
0x800014
0x280D00
2 PCM FIFO C Size - 6k byte
Blocksize - up to 2kbyte 0x800014
0x820300
Ta ble 21. Input FIFO Setup Configuration
(Input Parameter D)
CS49300 Family DSP
78 DS339F7
11.3. Output Data Hardware
Configuration
The naming convention for the DAO configuration
is as follows:
OUTPUT A B C D E
where the parameters are defined as:
A - DAO Mode (Master/Slave for LRCLK and
SCLK)
B - Data Format
C - MCLK Frequency
D - SCLK Frequency
E - SCLK Polarity
The following tables show the different values for
each parameter as well as the hex message that
needs to be sent. When creating the hardware
configuration message, only one hex message
should be sent per parameter.
A Value DAO Modes (LRCLK &
SCLK) Hex
Message
0
(default) MCLK - Slave
SCLK - Slave
LRCLK - Slave
0x80017F
0x400000
1 MCLK - Slave
SCLK - Master
LRCLK - Master
0x80027F
0xBFFFFF
2MCLK - Master
SCLK - Master
LRCLK - Master
0x80027F
0xBFDFFF
Table 22. Output Clock Configuration
(Parameter A)
B Value
DAO Data Format Of
AUDATA0, 1, 2 (or AUDATA0
for Multichannel Modes) Hex
Message
0
(default) I2S 24-bit
(Configuration of AUDA TA3 as S/PDIF
(IEC60958) or Digital Audio in the
format of I2S or Left Justified is
covered in AN162 and AN163)
0x80027F
0xFC7FFF
0x80027C
0xF01F00
0x80027D
0xF01F00
0x80027E
0xF01F00
0x80017F
0x038000
0x80017C
0x000001
0x80017D
0x000001
0x80017E
0x000001
1 Left Justified 24-bit
(Configuration of AUDA TA3 as S/PDIF
(IEC60958) or Digital Audio in the
format of I2S or Left Justified is
covered in AN162 and AN163)
0x80027F
0xFC7FFF
0x80027C
0xF01F00
0x80027D
0xF01F00
0x80027E
0xF01F00
0x80017F
0x018000
2Multichannel (6 channel)
20-bit Left Justified
(SCLK must be at least 128Fs
for this mode)
(Configuration of AUDA TA3 as S/PDIF
(IEC60958) or Digital Audio in the
format of I2S or Left Justified is
covered in AN162 and AN163)
0x80027F
0xFC7FFF
0x80027C
0xF00000
0x80017C
0x001300
0x80027D
0xF00000
0x80017D
0x001300
0x80027E
0xF00000
0x80017E
0x001300
Table 23. Output Data Format Configuration
(Parameter B)
CS49300 Family DSP
DS339F7 79
22 Multichannel (2 channel)
20-bit Left Justified
(SCLK must be at least 128Fs
for this mode)
(Configuration of AUDA TA3 as S/PDIF
(IEC60958) or Digital Audio in the
format of I2S or Left Justified is
covered in AN162 and AN163)
0x80027F
0xFC7FFF
0x80017F
0x018000
0x80027C
0xF01F00
0x80017C
0x001300
24 Multichannel (4 channel)
20-bit Left Justified
(SCLK must be at least 128Fs
for this mode)
(Configuration of AUDA TA3 as S/PDIF
(IEC60958) or Digital Audio in the
format of I2S or Left Justified is
covered in AN162 and AN163)
0x80027F
0xFC7FFF
0x80017F
0x010000
0x80027C
0xF01F00
0x80017C
0x001300
3 Multichannel (6 channel)
24-bit Left Justified
(SCLK must be at least 256Fs
for this mode)
(Configuration of AUDA TA3 as S/PDIF
(IEC60958) or Digital Audio in the
format of I2S or Left Justified is
covered in AN162 and AN163)
0x80027F
0xFC7FFF
0x80027C
0xF01F00
0x80027D
0xF01F00
0x80027E
0xF01F00
32 Multichannel (2 channel)
24-bit Left Justified
(SCLK must be at least 128Fs
for this mode)
(Configuration of AUDA TA3 as S/PDIF
(IEC60958) or Digital Audio in the
format of I2S or Left Justified is
covered in AN162 and AN163)
0x80027F
0xFC7FFF
0x80027C
0xF01F00
0x80017F
0x018000
34 Multichannel (4 channel)
24-bit Left Justified
(SCLK must be at least 128Fs
for this mode)
(Configuration of AUDA TA3 as S/PDIF
(IEC60958) or Digital Audio in the
format of I2S or Left Justified is
covered in AN162 and AN163)
0x80027F
0xFC7FFF
0x80017F
0x010000
0x80027C
0xF01F00
B Value
DAO Data Format Of
AUDATA0, 1, 2 (or AUDATA0
for Multichannel Modes) Hex
Message
Table 23. Output Data Format Configuration
(Parameter B) (Continued)
C Value MCLK Frequency Hex
Message
0
(default) 256Fs 0x80027F
0xFFE7FF
1 512Fs 0x80027F
0xFFE7FF
0x80017F
0x001000
2128Fs 0x80027F
0xFFE7FF
0x80017F
0x001800
3 384Fs
(SCLK must be 64Fs in this
mode and MC LK mu st be an
input)
0x80027F
0xFFE7FF
0x80017F
0x000800
Table 24. Output MCLK Configuration
(Parameter C)
D Value SCLK Frequency Hex
Message
0
(default) 64Fs 0x80027F
0xFFF8FF
0x80017F
0x000100
1 128Fs 0x80027F
0xFFF8FF
0x80017F
0x000200
2256Fs 0x80027F
0xFFF8FF
0x80017F
0x000300
Table 25. Output SCLK Configuration
(Parameter D)
E Value SCLK Polarity Hex
Message
0
(default) Data Valid on Rising Edge
(clocked out on falling) 0x80027F
0xF7FFFF
1 Data Valid on Falling Edge
(clocked out on rising ) 0x80017F
0x080000
Table 26. Output SCLK Polarity Configuration
(Parameter E)
CS49300 Family DSP
80 DS339F7
11.3.1. Output Configuration
Considerations
1) All PCM output is 24-bit resolution
2) An SCLK frequency of at least 128Fs must be
selected for the 20-bit multichannel (6 channel)
mode.
3) An SCLK frequency of at least 128Fs must be
selected for the 24-bit multichannel (4 channel)
mode.
4) An SCLK frequency of at least 256Fs must be
selected for the 24-bit multichannel (6 channel)
mode.
5) If the clocks to the audio ports are known to be
corrupted, such as when a S/PDIF receiver
goes out of lock, the DSP should undergo an
application restart (if applicable), soft reset or
hard reset. All three actions will result in the
input FIFO being reset. Failure to do so may
result in corrupted data being latched into the
input FIFO and may result in corrupted data
being heard on the outputs. This is not an issue
when compressed data is being delivered, as it
has sync words embedded in the stream which
the DSP can lock to, but only when PCM data
is being delivered. Certain application codes
that are capable of processing PCM may now
have a special feature called “PCM
Robustness” which does alleviate the above
problem, however you should still follow the
above recommendation.
11.4. Creating Hardware Configuration
Messages
The single hardware configuration message that
must be sent to the CS493XX after download or
soft reset should be a concatenation of the
messages in the previous sections. The complete
hardware configuration message should be
created by taking a message for each parameter
(where the default is not acceptable) and
concatenating the messages together. No
messages need to be sent if the default
configuration for a particular parameter is
acceptable. This example can be easily expanded
to fit other system requirements.
For example if the host system has the following
configuration:
Address Checking: Disabled
The above configuration is default so no
configuration message is required.
DAI: Left Justified
PCM and Compressed data
CDI: Not used
The above configuration corresponds to
INPUT A1 B1
which corresponds to a configuration message of:
0x800210
0x3FBFC0
0x800110
0xC0002C
0x800217
0x8080FF
0x80021A
0x8080FF
0x800117
0x001000
0x80011A
0x001800
DAO: Left Justified slave mode (LRCLK, SCLK
inputs)
MCLK @ 256Fs
SCLK @ 64Fs
The above configuration corresponds to
OUTPUT A0 B1 C0 D0
which has a configuration message of:
0x80027F
0xFC7FFF
0x80027C
0xF01F00
0x80027D
0xF01F00
0x80027E
0xF01F00
0x80017F
0x018000
Concatenating the messages together gives the
following hardware configuration message that
should be sent after download or soft reset:
CS49300 Family DSP
DS339F7 81
WORD# VALUE WORD# VALUE
1 0x800210 12 0x001800
20x3FBFC0 13 0x80027F
3 0x800110 14 0xFC7FFF
40xC0002C 15 0x80027C
5 0x800217 16 0xF01F00
60x8080FF 17 0x80027D
7 0x80021A 18 0xF01F00
80x8080FF 19 0x80027E
9 0x800117 20 0xF01F00
10 0x001000 21 0x80017F
11 0x80011A 22 0x018000
Table 27. Example Values to be Sent to CS493XX
After Download or Soft Reset
CS49300 Family DSP
82 DS339F7
12. PIN DESCRIPTIONS
VA—Analog Positive Supply: Pin 34
Analog positive supply for clock generator. Nominally +2.5 V.
AGND—Analog Supply Ground: Pin 35
Analog ground for clock generator PLL.
VD1, VD2, VD3—Digital Positive Supply: Pins 1, 12, 23
Digital positive supplies. Nominally +2.5 V.
DGND1, DGND2, DGND3—Digital Supply Ground: Pins 2, 13, 24
Digital ground.
FILT1—Phase-Locked Loop Filter: Pin 33
Connects to an external filter for the on-chip phase-locked loop.
FILT2—Phase Locked Loop Filter: Pin 32
Connects to an external filter for the on-chip phase-locked loop.
CLKIN—Master Clock Input: Pin 30
CS493XX clock input. When in internal clock mode (CLKSEL == DGND), this input is
connected to the internal PLL from which all internal clocks are derived. When in external
clock mode (CLKSEL == VD), this input is connected to the DSP clock. INPUT
7
8
9
10
11
12
13
14
15
16
17
39
38
37
36
35
34
33
32
31
30
29
18 19 2021 22 23 2425 26 27 28
6 5 4 3 2 1 44 4342 4140
CS493XX-CL
44-pin PLCC
Top View
VD2
DATA4,EMAD4,GPIO4 VA
DATA5,EMAD5,GPIO5
DATA6,EMAD6,GPIO6
DATA7,EMAD7,GPIO7
A0, SCCLK
A1, SCDIN
RD,R/W,EMOE,GPIO11
WR,DS,EMWR,GPIO10
AUDATA3, XMT958
DGND1
VD1
SDATAN1
EXTMEM, GPIO8
ABOOT, INTREQ
SCDIO, SCDOUT,PSEL,GPIO9
CS
DATA0,EMAD0,GPIO0
DATA1,EMAD1,GPIO1
DATA2,EMAD2,GPIO2
DATA3,EMAD3,GPIO3
DGND2
RESET
DD
DC
AUDATA2
AUDATA1
AUDATA0
LRCLK
SCLK
MCLK
VD3
DGND3
SCLKN1, STCCLK2
LRCLKN1
CMPDAT, SDATAN2, RCV958
CMPCLK, SCLKN2
CMPREQ, LRCLKN2
CLKIN
CLKSEL
FILT2
FILT1
AGND
CS49300 Family DSP
DS339F7 83
CLKSEL—DSP Clock Select: Pin 31
This pin selects the clock mode of the CS493XX. When CLKSEL is low, CLKIN is connected
to the internal PLL from which all internal clocks are derived. When CLKSEL is high CLKIN is
connected to the DSP clock. INPUT
DATA7, EMAD7, GPIO7—Pin 8
DATA6, EMAD6, GPIO6—Pin 9
DATA5, EMAD5, GPIO5—Pin 10
DATA4, EMAD4, GPIO4—Pin 11
DATA3, EMAD3, GPIO3—Pin 14
DATA2, EMAD2, GPIO2—Pin 15
DATA1, EMAD1, GPIO1—Pin 16
DATA0, EMAD0, GPIO0—Pin 17
In parallel host mode, these pins provide a bidirectional data bus. If a serial host mode is
selected, these pins can provide a multiplexed address and data bus for connecting an 8-bit
external memory. Otherwise, in serial host mode, these pins can act as general-purpose input
or output pins that can be individually configured and controlled by the DSP.
BIDIRECTIONAL - Default: INPUT
A0, SCCLK—Host Parallel Address Bit Zero or Serial Control Port Clock: Pin 7
In parallel host mode, this pin serves as one of two address input pins used to select one of
four parallel registers. In serial host mode, this pin serves as the serial control clock signal,
specifically as the SPI clock input or the I2C clock input. INPUT
A1, SCDIN—Host Address Bit One or SPI Serial Control Data Input: Pin 6
In parallel host mode, this pin serves as one of two address input pins used to select one of
four parallel registers. In SPI serial host mode, this pin serves as the data input. INPUT
RD, R/W, EMOE, GPIO11—Host Parallel Output Enable or Host Parallel R/W or External Memory
Output Enable or General Purpose Input & Output Number 11: Pin 5
In Intel parallel host mode, this pin serves as the active-low data bus enable input. In Motorola
parallel host mode, this pin serves as the read-high/write-low control input signal. In serial host
mode, this pin can serve as the external memory active-low data-enable output signal. Also in
serial host mode, this pin can serve as a general purpose input or output bit. At reset this pin
acts as one of the mode select pins. It requires a 3.3k Ohm pull-up or pull-down.
BIDIRECTIONAL - Default: INPUT
WR, DS, EMWR, GPIO10—Host Write Strobe or Host Data Strobe or External Memory Write
Enable or General Purpose Input & Output Number 10: Pin 4
In Intel parallel host mode, this pin serves as the active-low data-write-input strobe. In Motorola
parallel host mode, this pin serves as the active-low data-strobe-input signal. In serial host
mode, this pin can serve as the external-memory active-low write-enable output signal. Also in
serial host mode, this pin can serve as a general purpose input or output bit. At reset this pin
acts as one of the mode select pins. It requires a 3.3k Ohm pull-up or pull-down.
BIDIRECTIONAL - Default: INPUT
CS—Host Parallel Chip Select, Host Serial SPI Chip Select: Pin 18
In parallel host mode, this pin serves as the active-low chip-select input signal. In serial host
SPI mode, this pin is used as the active-low chip-select input signal. INPUT
CS49300 Family DSP
84 DS339F7
RESET—Master Reset Input: Pin 36
Asynchronous active-low master reset input. Reset should be low at power-up to initialize the
CS493XX and to guarantee that the device is not active during initial power-on stabilization
periods. At the rising edge of reset the host interface mode is selected contingent on the state
of the RD, WR and PSEL pins. Additionally, an autoboot sequence can be initiated if a serial
control mode is selected and ABOOT is held low. If reset is low all bidirectional pins are high
impedance inputs. INPUT
SCDIO, SCDOUT, PSEL, GPIO9—Serial Control Port Data Input and Output, Parallel Port Type
Select: Pin 19
In I2C mode, this pin serves as the open-drain bidirectional data pin. In SPI mode this pin
serves as the data output pin. In parallel host mode, this pin is sampled at the rising edge of
RESET to configure the parallel host mode as an Intel type bus or as a Motorola type bus. In
parallel host mode, after the bus mode has been selected, the pin can function as a general-
purpose input or output pin. At reset this pin acts as one of the mode select pins. It requires a
3.3k Ohm pull-up or pull-down. BIDIRECTIONAL - Default: INPUT
In I2C mode this pin is an OPEN DRAIN I/O and requires a 3.3k Pull-Up
EXTMEM, GPIO8—External Memory Chip Select or General Purpose Input & Output Number 8:
Pin 21 In serial control port mode, this pin can serve as an output to provide the chip-select for an
external byte-wide ROM. In parallel and serial host mode, this pin can also function as a
general-purpose input or output pin. BIDIRECTIONAL - Default: INPUT
INTREQ, ABOOT—Control Port Interrupt Request, Automatic Boot Enable: Pin 20
Open-drain interrupt-request output. This pin is driven low to indicate that the DSP has
outgoing control data and should be serviced by the host. Also in serial host mode, this signal
initiates an automatic boot cycle from external memory if it is held low through the rising edge
of reset. OPEN DRAIN I/O - Requires 3.3k Ohm Pull-Up
AUDATA2—Digital Audio Output 2: Pin 39
PCM multi-format digital-audio data output, capable of two-channel 20-bit output. This PCM
output defaults to DGND as output until enabled by the DSP software. OUTPUT
AUDATA1—Digital Audio Output 1: Pin 40
PCM multi-format digital-audio data output, capable of two-channel 20-bit output. This PCM
output defaults to DGND as output until enabled by the DSP software. OUTPUT
AUDATA0—Digital Audio Output 0: Pin 41
PCM multi-format digital-audio data output, capable of two-, four-, or six-channel 20-bit output.
This PCM output defaults to DGND as output until enabled by the DSP software. OUTPUT
MCLK—Audio Master Clock: Pin 44
Bidirectional master audio clock. MCLK can be an output from the CS493XX that provides an
oversampled audio-output clock at either 128 Fs, 256 Fs, or 512 Fs. MCLK can be an input at
128 Fs, 256 Fs, 384 Fs, or 512 Fs. MCLK is used to derive SCLK and LRCLK when SCLK and
LRCLK are driven by the CS493XX. BIDIRECTIONAL - Default: INPUT
CS49300 Family DSP
DS339F7 85
SCLK—Audio Output Bit Clock: Pin 43
Bidirectional digital-audio output bit clock. SCLK can be an output that is derived from MCLK
to provide 32 Fs, 64 Fs, 128 Fs, 256 Fs, or 512 Fs, depending on the MCLK rate and the
digital-output configuration. SCLK can also be an input and must be at least 48Fs or greater.
As an input, SCLK is independent of MCLK. BIDIRECTIONAL - Default: INPUT
LRCLK—Audio Output Sample Rate Clock: Pin 42
Bidirectional digital-audio output-sample-rate clock. LRCLK can be an output that is divided
from MCLK to provide the output sample rate depending on the output configuration. LRCLK
can also be an input. As an input LRCLK is independent of MCLK.
BIDIRECTIONAL - Default: INPUT
AUDATA3,XMT958—SPDIF Transmitter Output, Digital Audio Output 3: Pin 3
CMOS level output that contains a biphase-mark encoded (S/PDIF) or I2S or Left Justified
digital audio data which is capable of carrying two channels of PCM digital audio or an
IEC61937 compressed-data interface.
Note: Outputting of IEC61937 is only available for cert ain broadcast- based applica tion codes which run on
the CS4931X family or CS49330 device.
This output typically connects to the input of an RS-422 transmitter or to the input of an optical
transmitter. OUTPUT
SCLKN1, STCCLK2—PCM Audio Input Bit Clock: Pin 25
Bidirectional digital-audio bit clock that is an output in master mode and an input in slave
mode. In slave mode, SCLKN1 operates asynchronously from all other CS493XX clocks. In
master mode, SCLKN1 is derived from the CS493XX internal clock generator. In either master
or slave mode, the active edge of SCLKN1 can be programmed by the DSP. For applications
supporting PES layer synchronization this pin can be used as STCCLK2, which provides a
path to the internal STC 33 bit counter. BIDIRECTIONAL - Default: INPUT
LRCLKN1—PCM Audio Input Sample Rate Clock: Pin 26
Bidirectional digital-audio frame clock that is an output in master mode and an input in slave
mode. LRCLKN1 typically is run at the sampling frequency. In slave mode, LRCLKN1 operates
asynchronously from all other CS493XX clocks. In master mode, LRCLKN1 is derived from the
CS493XX internal clock generator. In either master or slave mode, the polarity of LRCLKN1 for
a particular subframe can be programmed by the DSP.
BIDIRECTIONAL - Default: INPUT
SDATAN1—PCM Audio Data Input Number One: Pin 22
Digital-audio data input that can accept from one to six channels of compressed or PCM data.
SDATAN1 can be sampled with either edge of SCLKN1, depending on how SCLKN1 has been
configured. INPUT
CMPCLK, SCLKN2—PCM Audio Input Bit Clock: Pin 28
Bidirectional digital-audio bit clock that is an output in master mode and an input in slave
mode. In slave mode, SCLKN2 operates asynchronously from all other CS493XX clocks. In
master mode, SCLKN2 is derived from the CS493XX internal clock generator. In either master
or slave mode, the active edge of SCLKN2 can be programmed by the DSP. If the CDI is
configured for bursty delivery, CMPCLK is an input used to sample CMPDAT. BIDIRECTIONAL
- Default: INPUT
CS49300 Family DSP
86 DS339F7
CMPREQ, LRCLKN2—PCM Audio Input Sample Rate Clock: Pin 29
When the CDI is configured as a digital audio input, this pin serves as a bidirectional digital-
audio frame clock that is an output in master mode and an input in slave mode. LRCLKN2
typically is run at the sampling frequency. In slave mode, LRCLKN2 operates asynchronously
from all other CS493XX clocks. In master mode, LRCLKN2 is derived from the CS493XX
internal clock generator. In either master or slave mode, the polarity of LRCLKN2 for a
particular subframe can be programmed by the DSP. When the CDI is configured for bursty
delivery, or parallel audio data delivery is being used, CMPREQ is an output which serves as
an internal FIFO monitor. CMPREQ is an active low signal that indicates when another block
of data can be accepted. BIDIRECTIONAL - Default: INPUT
CMPDAT, SDATAN2—PCM Audio Data Input Number Two: Pin 27
Digital-audio data input that can accept from one to six channels of compressed or PCM data.
SDATAN2 can be sampled with either edge of SCLKN2, depending on how SCLKN2 has been
configured. Similarly CMPDAT is the compressed data input pin when the CDI is configured for
bursty delivery. When in this mode, the CS493XX internal PLL is driven by the clock recovered
from the incoming data stream. INPUT
DC—Reserved: Pin 38
This pin is reserved and should be pulled up with an external 4.7k resistor.
DD—Reserved: Pin 37
This pin is reserved and should be pulled up with an external 4.7k resistor.
CS49300 Family DSP
DS339F7 87
13. ORDERING INFORMATION
Base Part Number
(6th digit = ROM ID)
Grades and Tempe r ature Ranges
Package Pb-free Option
“Z” Suffix
C
(Consumer)
0° to 70°C
I
(Industrial)
-40° to 85°C
D
(Automotive)
-40° to 85°C
CS493122 CS493122-CL
44-pin PLCC
CS493122-CLZ
CS493292 CS493292-CL CS493292-IL CS493292-CLZ
CS493302 CS493302-CL CS493302-IL CS493302-CLZ or -ILZ
CS493253 CS493253-CL CS493253-CLZ
CS493263 CS493263-CL CS493263-IL CS493263-DL
(Pb-free Only)
CS493263-CLZ or -ILZ or -DLZ
CS493254 CS493254-CL CS493254-IL CS493254-CLZ
CS493264 CS493264-CL CS493264-IL CS493264-CLZ
CS493005 CS493005-CL CS493005-CLZ
CS493105 CS493105-CL CS493105-CLZ
CS493115 CS493115-CL CS493115-CLZ
CS493295 CS493295-CL CS493295-CLZ
CS493105-CLZ
EFBAJXAB0325
Device Revison Level
12-Character Pack Mark
CS49300 Family DSP
88 DS339F7
14. PACKAGE DIMENSIONS
INCHES MILLIMETERS
DIM MIN MAX MIN MAX
A 0.165 0.180 4.191 4.572
A1 0.090 0.120 2.286 3.048
B 0.013 0.021 .330 0.533
D 0.685 0.695 17.399 17.653
D1 0.650 0.656 16.510 16.662
D2 0.590 0.630 14.986 16.002
E 0.685 0.695 17.399 17.653
E1 0.650 0.656 16.510 16.662
E2 0.590 0.630 14.986 16.002
e 0.040 0.060 1.016 1.524
44L PLCC PACKAGE DRAWING
D1
D
E1 ED2/E2
B
e
A1
A
CS49300 Family DSP
DS339F7 89
15. DOCUMENT REVISIONS
Revision Date Changes
PP4 Mar 2003 Last preliminary release.
F1 Feb 2004 Initial final release.
1. p.73, Corrected Hex Message ”B” Value 74 from:
0x0014C0 to 0x0028C0
2. p. 84, Added ROM ID-5 devices and a note on ordering lead-free devices to
“Ordering Information” . Also added a description of the char acters that comprise
the part number.
3. Removed ambien t temperature condition (TA=25°C) from Spec Tables.
4. Changed Note 6. in Table 1.9 (p.12) and Table 1.10 (p.14) from:
With a 4.7k Ohm pull-up resistor this value is typically 215ns. As this pin is open
drain adjusting the pull up value will affect the rise time.
to
With a 3.3k Ohm pull-up resistor this value is typically 260ns. As this pin is open
drain adjusting the pull up value will affect the rise time.
5. Added a section “2.1. - CS493XX Document Strategy” (p.21)
6. p.10, Changed CS to DS for Tmdd
7. p.10, Deleted the word “low” from the Parameter column for Tmdis
8. p. 84 Added two diagrams that indicate how to determine the “Device Revi-
sion Level” from the 10-character or the 12-character Pack Mark written on the
top of chip, below the device nu mber.
9. p. 80, Made reference to the use of pin 4 & pin 5 as mode select pin at reset.
Also added that both these pins require 3.3 k Ohm pull-up or pull-down
10. p. 81, Changed pin 19 & pin 20 pull-up/down resistor requirement to 3.3 k
Ohm. Also mention of pin 19 usage as a mode select pin during reset.
F2 Apr 2004 Changed “All bidirectional pins high-Z after RESET low” ( Trst2z) pa rameter from
50ns Max to 100ns Max. See page 8.
F3 APR 2005 Updated Device Ordering Information to include Pb-free devices.
F4 JUN 2005 Corrected error in mechanical information - “e”, pin spacing from .102 mm to
1.016 mm
F5 NOV 2005 Updated CLKIN high/low times to 14 ns. Added “Delay from falling edge of
CMPREQ to CMPCLK rising edge” parameter to Serial Bursty Data Input timing
(0 ns). Updated same timing diagram to include Treqclk parameter.
F6 JAN 2006 AddedThermal Data section (section 1.3)
F7 APR 2006 Added Note 3 and Note 4 to Section 1.3, “Thermal Data” on page 7. Corrected
copyright date.
