CS42528-DQZR - Cirrus Logic - Datasheet.Directory

http://www.cirrus.com

114 dB, 192 kHz 8-Ch Codec with S/PDIF Receiver

Features

Eight 24-bit D/A, two 24-bit A/D Converters

114 dB DAC / 114 dB ADC Dynamic Range

-100 dB THD+N

System Sampling Rates up to 192 kHz

S/PDIF Receiver Compatible with EIAJ

CP1201 and IEC-60958

Recovered S/PDIF Clock or System Clock

Selection

8:2 S/PDIF Input MUX

ADC High-Pass Filter for DC Offset Calibration

Expandable ADC Channels and One-Line

Mode Support

Digital Output Volume Control with Soft Ramp

Digital +/-15 dB Input Gain Adjust for ADC

Differential Analog Architecture

Supports Logic Levels between 1.8 V and 5 V

General Description

The CS42528 codec provides two analo g-to-digital and

eight digital-to-analog delta-sigma converters, as well

as an integrated S/PDIF receiver.

The CS42528 integrated S/PDIF receiver supports up

to eight inputs, clock recovery circuitry and fo rmat auto-

detection. The internal stereo ADC is capable of inde-

pendent channel gain control for single-ended or

differential analog inputs. All eight channels of DAC pro-

vide digital volume control and differential analog

outputs. The general-purpose outputs may be driven

high or low, or mapped to a variety of DAC mute con-

trols or ADC overflow indicators.

The CS42528 is ideal for audio systems requiring wide

dynamic range, negligible distortion and low noise, such

as A/V receivers, DVD receivers, digital speaker and

automotive audio systems.

The CS42528 is available in a 64-pin LQFP package in

both Commercial (-10° to 70° C) and Automotive

(-40° to 85° C) grades. The CDB42528 Customer Dem-

onstration board is also available for device evaluation.

Refer to “Ordering Information” on page 89.

RST

RXP0

RXP1/GPO1

AD0/CS

SCL/CCLK

SDA/CDOUT

AD1/CDIN

VLC

AOUTA1+

AOUTA1-

AOUTB1+

AOUTA3+

AOUTA3-

AOUTA2-

AOUTB2-

AOUTA2+

AOUTB2+

AOUTB1-

AOUTB3+

AOUTB3-

AOUTA4+

AOUTA4-

AOUTB4+

AOUTB4-

AINL+

AINL-

AINR+

AINR-

FILT+

REFGND

VQ Ref

ADC#1

ADC#2

Digital Filter

Gain & Clip

Gain & Clip CX_SDOUT

ADCIN1

ADCIN2

CX_SCLK

CX_LRCK

CX_SDIN4

CX_SDIN3

CX_SDIN2

CX_SDIN1

VLS

SAI_LRCK

SAI_SCLK

SAI_SDOUT

DGND VD

OMCK

RMCK

LPFLTTXP

INT

Rx Clock/Data

Recovery S/PDIF

Decoder

DEM Serial

Audio

Interface

Port

C&U Bit

Data Buffer Control

Port

DAC#1

DAC#2

DAC#3

DAC#4

DAC#5

DAC#6

DAC#7

DAC#8

Digital Filter

Volume Control

DGND

RXP2/GPO2

RXP3/GPO3

RXP4/GPO4

RXP5/GPO5

RXP6/GPO6

RXP7/GPO7

MUTEC

GPO

Analog Filter

VARX AGND

ADC

Serial

Data

AGND

Internal MCLK

CODEC

Serial

Port

Mult/Div

Format

Detector

MUTE

NOVEMBER '05

DS586F1

CS42528

2DS586F1
CS42528
TABLE OF CONTENTS
CHARACTERISTICS AND SPECIFICATIONS ...................................................................................... 7
SPECIFIED OPERATING CONDITIONS ............................................................................................... 7
ABSOLUTE MAXIMUM RATINGS ......................................................................................................... 7
ANALOG INPUT CHARACTERISTICS .................................................................................................. 8
A/D DIGITAL FILTER CHARACTERISTICS  .......................................................................................... 9
ANALOG OUTPUT CHARACTERISTICS ............................................................................................ 10
D/A DIGITAL FILTER CHARACTERISTICS  ........................................................................................ 11
SWITCHING CHARACTERISTICS  ......................................................................................................12
SWITCHING CHARACTE RISTIC S - CONTRO L PORT - I ²C FORMAT  ..... ... ... ... .... ... ... ... ... .... ... ... ... ... 13
SWITCHING CHARACTERISTICS - CONTROL PORT - SPI™ FORMAT  .......................................... 14
DC ELECTRICAL CHARA CTERISTIC S  . ... ... .... ... ... ... .... ... ... ... .... ... ... ... .................... ... ................... ... ... 15
DIGITAL INTERFACE CHARACTERISTICS  ....................................................................................... 16
PIN DESCRIPTIONS ............................................................................................................................ 17
TYPICAL CONNECTION DIAGRAM      ............................................................................................... 20
APPLICATIONS  ................................................................................................................................... 21
1 Overview ......................................................................................................................................... 21
2 Analog Inputs .................................................................................................................................. 21
2.1 Line-Level Inputs ............................ .... ... ... ... .... ................ ... ... ... .... ... ... ... .... ... ......................... 21
2.2 High-Pass Filter and DC Offset Calibration ........................................................................... 22
3 Analog Outputs ............................................................................................................................... 22
3.1 Line-Level Outputs and Filtering  ........................................................................................... 22
3.2 Interpolation Filter ..... ... ... ................................. ... ... ... .... ... ... ... ... .... ......................................... 22
3.3 Digital Volume and Mute Control . ... .... ... ... ... .... ... ... .................................... ............................ 23
3.4 ATAPI Specification ..... ... ................................. ... ... ... .... ... ... ... ... .... ......................................... 23
4 S/PDIF Receiver ............................................................................................................................. 24
4.1 8:2 S/PDI F Input Multiplexer  . ... ................ ... .... ... ... ... .... ... ... ... ... ................. ... ... ... ... .... ... ... ...... 24
4.2 Error Reporting and Hold Function ........ ... ... .... ... ... ... .... ... ................... ... .................... ... .........24
4.3 Channel Status Data Handling .............................................................................................. 24
4.4 User Data Handling ........................ .... ... ... ... ................. ... ... ... ... .... ... ... ... .... ... ......................... 24
4.5 Non-Audio Auto-Detection .............. .... ... ... ............................................................................. 24
5 Clock Generation ............................................................................................................................ 25
5.1 PLL and Jitter Attenuation ..................................................................................................... 25
5.2 OMCK System Clock Mode ...................................................................................................26
5.3 Master Mode  ..... .... ................ ... ... ... .... ... ... ... .... ... ... ................ ... .... ... ... ... .... ... ... ... ... ................ 26
5.4 Slave Mode  .................... .... ... ... ................ ... .... ... ... ... ................ .... ... ... ... .... ... ......................... 26
6 Digital Interfaces ............................................................................................................................. 27
6.1 Serial Audio Interface Signals  ............ ... ... ... .... ................ ... ... ... .... ... ... ... .... ... ... ................ ...... 27
6.2 Serial Audio Interface Formats ........... ................................................................................... 29
6.3 ADCIN1/ADCIN2 Serial Data Format .................................................................................... 32
6.4 One-Line Mode (OLM) Configurations .................................................................................. 33
6.4.1 OLM Config #1 ........................................................................................................... 33
6.4.2 OLM Config #2 ........................................................................................................... 34
6.4.3 OLM Config #3 ........................................................................................................... 35
6.4.4 OLM Config #4 ........................................................................................................... 36
6.4.5 OLM Config #5 ........................................................................................................... 37
7 Control Port Description and Timing ............................................................................................... 38
7.1 SPI Mode ........... .... ................ ... ... ... .... ... ... ... .... ................ ... ... ... .... ... ... ... ................ ................ 38
7.2 I²C Mode ...................... ... .... ... ... ... ... .... ................ ... ... .... ... ... ... ... .... ................ ... ... ................... 39
8 Interrupts  ........................................................................................................................................ 40
9 Reset and Power-Up ...................................................................................................................... 40
10 Power Supply, Grounding, and PCB Layout  ................................................................................ 41
REGISTER QUICK REFERENCE ........................................................................................................ 42

DS586F1 3
CS42528
REGISTER DESCRIPTION .................................................................................................................. 46
1 Memory Address Pointer (MAP) ..................................................................................................... 46
2 Chip I.D. and Revision Register (address 01h) (Read Only) .......................................................... 46
3 Power Control (address 02h) .......................................................................................................... 47
4 Functional Mode (address 03h) ...... ... ... ... .... ... ... ... .... ... ... ... .................... ... ................... ... ................ 48
5 Interface Formats (address 04h) .................................................................................................... 50
6 Misc Control (address 05h)  ............................................................................................................ 51
7 Clock Control (address 06h) ........................................................................................................... 53
8 OMCK/PLL_CLK Ratio (address 07h) (Read Only)  ....................................................................... 54
9 RVCR Status (address 08h) (Read Only) ....................................................................................... 54
10 Burst Preamble PC and PD Bytes (addresses 09h - 0Ch)(Read Only) ........................................ 56
11 Volume Transition Control (address 0Dh) .......... ................. ... ... ... ... .... ... ... ... .... ... ................ ... ... ... 56
12 Channel Mute (address 0Eh) ........................................................................................................ 58
13 Volume Control (addresses 0Fh, 10h, 11h, 12h, 13h, 14h, 15h, 16h)     ...................................... 58
14 Channel Invert (address 17h) ....................................................................................................... 59
15 Mixing Control Pair 1 (Channels A1 & B1)(address 18h)
Mixing Control Pair 2 (Channels A2 & B2)(address 19h)
Mixing Control Pair 3 (Channels A3 & B3)(address 1Ah)
Mixing Control Pair 4 (Channels A4 & B4)(address 1Bh)  ............................................................ 59
16 ADC Left Channel Gain (address 1Ch) ........ ... ... ................. ... ... ... ... .... ... ... ................ ... .... ... ... ... ... 61
17 ADC Right Channel Gain (address 1Dh) ................................ ... ... ... .... ... ... ... ................ .... ... ... ... ...61
18 Receiver Mode Control (address 1Eh)  ......................................................................................... 61
19 Receiver Mode Control 2 (address 1Fh)  ...................................................................................... 63
20 Interrupt Status (address 20h) (Read Only)  ................................................................................. 63
21 Interrupt Mask (address 21h)  .... ... ... ... ... ....................................................................................... 64
22 Interrupt Mode MSB (address 22h)
Interrupt Mode LSB (address 23h)  ...............................................................................................65
23 Channel Status Data Buffer Control (address 24h) ...................................................................... 65
24 Receiver Channel Status (address 25h) (Read Only)  .................................................................. 66
25 Receiver Errors (address 26h) (Read Only) .................... .... ... ... ... ... .... ... ... ... .... ................ ... ... ... ...67
26 Receiver Errors Mask (address 27h) ............................................................................................ 68
27 Mutec Pin Control (address 28h) ..... ... ... .... ... ... ... .... ... ... ... .... ... ... ................... .... ................... ......... 69
28 RXP/General-Purpose Pin Control (addresses 29h to 2Fh) ......................................................... 69
29 Q-Channel Subcode Bytes 0 to 9 (addresses 30h to 39h) (Read Only) ....................................... 71
30 C-Bit or U-Bit Data Buffer (addresses 3Ah to 51h) (Read On ly)  .. ... .... ... ... ... .... ... ... ................ ... ... 71
PARAMETER DEFINITIONS ................................................................................................................ 72
APPENDIX A: EXTERNAL FILTERS ................................................................................................... 73
1 ADC Input Filter .............................................................................................................................. 73
2 DAC Output Filter ........................................................................................................................... 73
APPENDIX B: S/PDIF RECEIVER ....................................................................................................... 74
1 Error Reporting and Hold Function ................................................................................................. 74
2 Channel Status Data Handling ....................................................................................................... 74
2.1 Channel Status Data E Buffer Access ................................................................................... 75
2.1.1 One-Byte Mode ..........................................................................................................75
2.1.2 Two-Byte Mode ..........................................................................................................75
2.2 Serial Copy Management System (SCMS) ........................................................................... 76
3 User (U) Data E Buffer Access ....................................................................................................... 76
3.1 Non-Audio Auto-Detection ..................................................................................................... 76
3.1.1 Format Detection .......................................................................................................76
APPENDIX C: PLL FILTER ................................................................................................................ 77
1 External Filter Components .......................................................................................................... 77
1.1 General ............ .... ... ................ ... ... .... ... ... ... .... ... ... ... ................ .... ... ... ... .... ... ... ... ................... 77
1.2 Jitter Attenuation  . ... ... ... .................................................... ................................................... 79
1.3 Capacitor Selection ...................... .... ... ... ... .... ... ... ... .... ... ... ... ... .... ... ... ... .... ... ......................... 80

4DS586F1
CS42528
10.1.4 Circuit Board Layout ............................................................................................................ 80
11. APPENDIX D: EXTERNAL AES3-S/PDIF-IEC60958 RECEIVER COMPONENTS .......................... 81
11.1 AES3 Receiver External Components .......................................................................................... 81
12. APPENDIX E: ADC FILTER PLOTS .................................................................................................. 82
13. APPENDIX F: DAC FILTER PLOTS .................................................................................................. 84
14. PACKAGE DIMENSIONS     ............................................................................................................... 88
THERMAL CHARACTERISTICS .......................................................................................................... 88
15. ORDERING INFORMATION  .............................................................................................................. 89
16. REFERENCES .................................................................................................................................... 89
17. REVISION HISTORY  ......................................................................................................................... 90
LIST OF FIGURES
Figure 1.Serial Audio Port Master Mode Timing ....................................................................................... 12
Figure 2.Serial Audio Port Slave Mode Timing ............ ... .... ... ... ... .... ... ... ... ... .................... ... ... ... .... ... ......... 12
Figure 3.Control Port Timing - I²C Format . ... ... ... .... ... ... ... .... ... ................... ... .................... ... ...................... 13
Figure 4.Control Port Timing - SPI Format ... ... ... .... ... ... ... .... ... ... ... .... ... ... ... ... .... ... ................... ... .... ............ 14
Figure 5.Typical Connection Diagram ....................................................................................................... 20
Figure 6.Full-Scale Analog Input ............................................................................................................... 21
Figure 7.Full-Scale Output ..................... ... ... ... ... .... ... ... ... .... ................................ ... ... .... ... ... ...................... 22
Figure 8.ATAPI Block Diagram (x = channel pair 1, 2, 3, 4)  .....................................................................23
Figure 9.CS42528 Clock Generation ........................................................................................................ 25
Figure 10.I²S Serial Audio Formats ........................................................................................................... 29
Figure 11.Left-Justified Serial Audio Formats ........................................................................................... 30
Figure 12.Right-Justified Serial Audio Formats ......................................................................................... 30
Figure 13.One-Line Mode #1 Serial Audio Format  ................................................................................... 31
Figure 14.One-Line Mode #2 Serial Audio Format  ................................................................................... 31
Figure 15.ADCIN1/ADCIN2 Serial Audio Format ................... ... ... .... ... ... ... ... .... ... ... ... .... ... ... ... ... .... ... ... ...... 32
Figure 16.OLM Configuration #1 ............................................................................................................... 33
Figure 17.OLM Configuration #2 ............................................................................................................... 34
Figure 18.OLM Configuration #3 ............................................................................................................... 35
Figure 19.OLM Configuration #4 ............................................................................................................... 36
Figure 20.OLM Configuration #5 ............................................................................................................... 37
Figure 21.Control Port Timing in SPI Mode  .............................................................................................. 38
Figure 22.Control Port Timing, I²C Write ................................................................................................... 39
Figure 23.Control Port Timing, I²C Read ................................................................................................... 39
Figure 24.Recommended Analog Input Buffer .......... ... ... .... ... ... ................ ... .... ... ... ... .... ... ... ... ................... 73
Figure 25.Recommended Analog Output Buffer ................. ... ... ... .... ... ... ................................................... 73
Figure 26.Channel Status Data Buffer Structure ....................................................................................... 75
Figure 27.PLL Block Diagram ................................................................................................................... 77
Figure 28.Jitter-Attenuation Characteristics of PLL - Configurations 1 & 2 ............................................... 79
Figure 29.Jitter-Attenuation Characteristics of PLL - Configuration 3 ....................................................... 79
Figure 30.Recommended Layout Example ............................................................................................... 80
Figure 31.Consumer Input Circuit ............. ... ... ... .... ... ... ... .... ... ................... ... .................... ... ...................... 81
Figure 32.S/PDIF MUX Input Circuit ......................................................................................................... 81
Figure 33.TTL/CMOS Input Circuit  .. ... .... ................... ... .................... ... ................... ... ................................ 81
Figure 34.Single-Speed Mode Stopband Rejection .................................................................................. 82
Figure 35.Single-Speed Mode Transition Band ........................................................................................ 82
Figure 36.Single-Speed Mode Transition Band (Detail) ............... ............. ............. ............. ............. ......... 82
Figure 37.Single-Speed Mode Passband Ripple ...................................................................................... 82
Figure 38.Double-Speed Mode Stopband Rejection  . ... ... .... ... ................................................... ................82
Figure 39.Double-Speed Mode Transition Band ....................................................................................... 82
Figure 40.Double-Speed Mode Transition Band (Detail) .......................................................................... 83
Figure 41.Double-Speed Mode Passband Ripple ..................................................................................... 83

DS586F1 5
CS42528
Figure 42.Quad-Speed Mode Stopband Rejection ...................................................................................83
Figure 43.Quad-Speed Mode Transition Band  ......................................................................................... 83
Figure 44.Quad-Speed Mode Transition Band (Detail) .............................................................................83
Figure 45.Quad-Speed Mode Passband Ripple  .................... ... ... .... ... ... ... ... .... ... ... ... .... ... ... ... ... ................ 83
Figure 46.Single-Speed (fast) Stopband Rejection ................................................................................... 84
Figure 47.Single-Speed (fast) Transition Band ......................................................................................... 84
Figure 48.Single-Speed (fast) Transition Band (detail) ............................................................................. 84
Figure 49.Single-Speed (fast) Passband Ripple ....................................................................................... 84
Figure 50.Single-Speed (slow) Stopband Rejection  ................................................................................. 84
Figure 51.Single-Speed (slow) Transition Band ........................................................................................ 84
Figure 52.Single-Speed (slow) Transition Band (detail) ............................................................................ 85
Figure 53.Single-Speed (slow) Passband Ripple ...................................................................................... 85
Figure 54.Double-Speed (fast) Stopband Rejection  ................................................................................. 85
Figure 55.Double-Speed (fast) Transition Band . ....................................................................................... 85
Figure 56.Double-Speed (fast) Transition Band (detail) ............................................................................ 85
Figure 57.Double-Speed (fast) Passband Ripple ............ .... ... ... ... .... ... ... ... ... .... ... ... ... .... ... ... ... ... .... ... ... ...... 85
Figure 58.Double-Speed (slow) Stopband Rejection ...... .... ... ... ... .... ................................................... ...... 86
Figure 59.Double-Speed (slow) Transition Band  ...................................................................................... 86
Figure 60.Double-Speed (slow) Transition Band (detail)  .......................................................................... 86
Figure 61.Double-Speed (slow) Passband Ripple .................................................................................... 86
Figure 62.Quad-Speed (fast) Stopband Rejection ....... ... .... ................... ... .................... ... ................... ...... 86
Figure 63.Quad-Speed (fast) Transition Band .......................................................................................... 86
Figure 64.Quad-Speed (fast) Transition Band (detail) .............................................................................. 87
Figure 65.Quad-Speed (fast) Passband Ripple ........................................................................................ 87
Figure 66.Quad-Speed (slow) Stopband Rejection ................................................................................... 87
Figure 67.Quad-Speed (slow) Transition Band ......... ... ... .... ................................................... ................... 87
Figure 68.Quad-Speed (slow) Transition Band (detail) ....... ... ... ... .... ... ... ... ... .... ... ... ... .... ... ... ... ... .... ... ......... 87
Figure 69.Quad-Speed (slow) Passband Ripple ....................................................................................... 87

6DS586F1
CS42528
LIST OF TABLES
Table 1. Common OMCK Clock Frequencies............................................................................................ 26
Table 2. Common PLL Output Clock Frequencies..................................................................................... 26
Table 3. Slave Mode Clock Ratios............................................................................................................. 27
Table 4. Serial Audio Port Channel Allocations ......................................................................................... 28
Table 5. DAC De-Emphasis....................................................................................................................... 49
Table 6. Receiver De-Emphasis ................................................................................................................ 49
Table 7. Digital Interface Formats.............................................................................................................. 50
Table 8. ADC One-Line Mode.................................................................................................................... 50
Table 9. DAC One-Line Mode.................................................................................................................... 50
Table 10. RMCK Divider Settings .............................................................................................................. 53
Table 11. OMCK Frequency Settings ........................................................................................................ 53
Table 12. Master Clock Source Select....................................................................................................... 54
Table 13. AES Format Detection ............................................................................................................... 55
Table 14. Receiver Clock Frequency Detec tion............ ... .... ... ... ................ ... .... ... ... ... .... ... ................ ......... 56
Table 15. Example Digital Volume Settings............................................................................................... 58
Table 16. ATAPI Decode ........................................................................................................................... 60
Table 17. Example ADC Input Gain Settings............................................................................................. 61
Table 18. TXP Output Selection................................................................................................................. 63
Table 19. Receiver Input Selection............................................................................................................ 63
Table 20. Auxiliary Data Width Selection................................................................................................... 66
Table 21. External PLL Component Values & Locking Modes .................................................................. 77

DS586F1 7

CS42528

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.)

SPECIFIED OPERATING CONDITIONS

(AGND=DGND=0, all voltages with respect to ground; OMCK=12.288 MHz; Master Mode)

ABSOLUTE MAXIMUM RATINGS

(AGND = DGND = 0 V; all voltages with respect to ground.)

WARNING:Operation at or be yond these limit s may result in permanent damage to the device. Normal operation

is not guaranteed at these extremes.

Notes: 1. Any pin except supplies. Transient currents of up to ±100 mA on the analog input pins will not cause

SCR latch-up.

2. The maximum over/unde r voltage is limited by the input current.

Parameter Symbol Min Typ Max Units

DC Power Supply Analog

Digital

Serial Port Interface

Control Port Interface

VA / VARX

VLS

VLC

4.75

3.13

1.8

5.0

3.3

5.0

5.25

Ambient Operating Temperature (power applied) CS42528-CQZ

CS42528-DQZ TA-10

-40 -

-+70

+85 °C

°C

Parameters Symbol Min Max Units

DC Power Supply Analog

Digital

Serial Port Interface

Control Port Interface

VA / VARX

VLS

VLC

-0.3

6.0

Input Current (Note 1) Iin -±10mA

Analog Input Voltage (Note 2) VIN AGND-0.7 VA+0.7 V

Digital Input Vol tage Serial Port Interface

(Note 2) Control Port Interface

S/PDIF interface

VIND-S

VIND-C

VIND-SP

-0.3

VLS+ 0.4

VLC+ 0.4

VARX+0.4

Ambient Operating Temperature(power applied) CS42528-CQZ

CS42528-DQZ TA

-20

-50 +85

+95 °C

°C

Storage Temperature Tstg -65 +150 °C

8DS586F1

CS42528

ANALOG INPUT CHARACTERISTICS

(TA = 25° C; VA =VARX= 5 V, VD = 3.3 V, Logic “0” = DGND =AGND = 0 V; Logic “1” = VLS = VLC = 5 V; Mea-

surement Bandwidth is 10 Hz to 20 kHz unless otherwise specified. Full-scale input sine wave, 997 Hz.;

PDN_RCVR = 1; SW_CTRL[1:0] = ‘01’; OMCK = 12.288 MHz; Single-Speed Mode CX_SCLK = 3.072 MHz; Dou-

ble-Speed Mode CX_SCLK = 6.144 M Hz; Quad-Speed Mode CX_SCLK = 12.288 MHz.)

Notes: 3. Referred to the typical full-scale voltage.

4. Measured between AIN+ and AIN-

Parameter Symbol CS42528-CQZ

Min Typ Max CS42528-DQZ

Min Typ Max Unit

Single-Speed Mode (Fs=48 kHz)

Dynamic Range A-weighted

unweighted 108

105 114

111 -

-106

103 114

111 -

-dB

Total Harmonic Distortion + Noise

(Note 3) -1 dB

-20 dB

-60 dB

THD+N -

-100

-91

-51

-94

-100

-91

-51

-92

Double-Speed Mode (Fs=96 kHz)

Dynamic Range A-weighted

unweighted

40 kHz bandwidth unweighted

108

105

114

111

108

106

103

114

111

108

Total Harmonic Distortion + Noise

(Note 3) -1 dB

-20 dB

-60 dB

40 kHz bandwidth -1 dB

THD+N -

-100

-91

-51

-97

-94

-100

-91

-51

-97

-92

Quad-Speed Mode (Fs=192 kHz)

Dynamic Range A-weighted

unweighted

40 kHz bandwidth unweighted

108

105

114

111

108

106

103

114

111

108

Total Harmonic Distortion+ Noise

(Note 3) -1 dB

-20 dB

-60 dB

40 kHz bandwidth -1 dB

THD+N -

-100

-91

-51

-97

-94

-100

-91

-51

-97

-92

Dynamic Performa nce for All Modes

Interchannel Isolation - 110 - - 110 - dB

Interchannel Phase Deviation - 0.0001 - - 0.0001 - Degree

DC Accuracy

Interchannel Gain Mismatch - 0.1 - - 0.1 - dB

Gain Drift - +/-100 - - +/-100 - ppm/°C

Offset Error HPF_FREEZE disabled

HPF_FREEZE enabled -

-0

100 -

-0

100 -

-LSB

LSB

Analog Input

Full-scale Differential Input Vol tage 1.05 VA 1.10 VA 1.16 VA 0.99 VA 1.10 VA 1.21 VA Vpp

Input Impedance (Differential) (Note 4) 17 - - 17 - - kΩ

Common Mode Rejection Ratio CMRR - 82 - - 82 - dB

DS586F1 9
CS42528
A/D DIGITAL FILTER CHARACTERISTICS
   
Notes: 5. The filter frequency response scales precisely with Fs.
6. Response shown is for Fs equal to 48 kHz. Filter characteristics scale with Fs.
Parameter Symbol Min Typ Max Unit
Single-Speed Mode (2 to 50 kHz sample rates)
Passband (-0.1 dB) (Note 5) 0-0.47Fs
Passband Ripple --±0.035 dB
Stopband  (Note 5) 0.58 - - Fs
Stopband Attenuation -95 - - dB
Total Group Delay (Fs = Output Sample Rate) tgd - 12/Fs - s
Group Delay Variation vs. Frequency ∆tgd --0.0µs
Double-Speed Mode (50 to 100 kHz sample rates)
Passband (-0.1 dB) (Note 5) 0-0.45Fs
Passband Ripple --±0.035 dB
Stopband (Note 5) 0.68 - - Fs
Stopband Attenuation -92 - - dB
Total Group Delay (Fs = Output Sample Rate) tgd -9/Fs- s
Group Delay Variation vs. Frequency ∆tgd --0.0µs
Quad-Speed Mode (100 to 192 kHz sample rates)
Passband (-0.1 dB) (Note 5) 0-0.24Fs
Passband Ripple --±0.035 dB
Stopband (Note 5) 0.78 - - Fs
Stopband Attenuation -97 - - dB
Total Group Delay (Fs = Output Sample Rate) tgd -5/Fs- s
Group Delay Variation vs. Frequency ∆tgd --0.0µs
High-Pass Filter Characteristics
Frequency Response -3.0 dB
-0.13 dB (Note 6) -1
20 -
-Hz
Hz
Phase Devia ti o n @ 20 Hz (No te 6) -10-Deg
Passband Ripple --0dB
Filter Setting Time -10
5/Fs - s

10 DS586F1

CS42528

ANALOG OUTPUT CHARACTERISTICS

(TA = 25° C; VA =VARX= 5 V, VD = 3.3 V, Logic “0” = DGND =AGND = 0 V; Logic “1” = VLS = VLC = 5V; Measure-

ment Bandwidth 10 Hz to 20 kHz unless otherwise specified.; Full-scale output 997 Hz sine wave, Test load RL =

3kΩ, CL = 30 pF; PDN_RCVR = 1; SW_CTRL[1:0] = ‘01’; OMCK = 12.288 MHz; Single-Speed Mode, CX_SCLK =

3.072 MHz; Double-Speed Mode, CX_SCLK = 6.144 MHz; Quad-Speed Mode, CX_SCLK = 12.288 MHz.)

Notes: 7. One-half LSB of triangular PDF dither is added to data.

8. Performance limited b y 16-bit quantization noise.

Parameter Symbol CS42528-CQZ

Min Typ Max CS42528-DQZ

Min Typ Max Unit

Dynamic performance for all modes

Dynamic Range (Note 7)

24-bit A-Weighted

unweighted

16-bit A-Weighted

(Note 8) unweighted

108

105

114

111

106

103

114

111

Total Harmonic Distortion + Noise

24-bit 0 dB

-20 dB

-60 dB

16-bit 0 dB

(Note 8) -20 dB

-60 dB

THD+N

-100

-91

-51

-94

-74

-34

-94

-100

-91

-51

-94

-74

-34

-92

Idle Channel Noise/Signal-to-Noise

Ratio (A-Weighted) - 114 - - 114 - dB

Interchannel Isolation (1 kHz) -90 --90 -dB

Analog Output Characteristics for all modes

Unloaded Full-Scale Differential Output

Voltage VFS .89VA .94VA .99VA .84VA .94VA 1.04VA Vpp

Interchannel Gain Mismatch - 0.1 - - 0.1 - dB

Gain Drift - 300 - - 300 - ppm/°C

Output Impedance ZOUT - 150 - - 150 - Ω

AC-Load Resistance RL3- -3- -kΩ

Load Capacitance CL- - 30 - - 30 pF

DS586F1 11
CS42528
D/A DIGITAL FILTER CHARACTERISTICS
     
Notes: 9. Response is clock dependent and will scale with Fs. Note that the response plots (Figures 46 to 69) have
been normalized to Fs and can be de-n ormalized  by multiplying the X-axis scale by Fs.
10. Single- and Double-Speed Mode Measurement Bandwidth is from stopband to 3 Fs. 
Quad-Speed Mode Measurement Bandwidth is from stopband to 1.34 Fs.
11. De-emphasis is available only in Single-Speed Mode.
Parameter Fast Roll-Off Slow Roll-Off UnitMin Typ Max Min Typ Max
Combined Digital and On-chip Analog Filter Response - Single-Speed Mode - 48 kHz 
Passband (Note 9) to -0.01 dB corner
to -3 dB corner 0
0-
-0.4535
0.4998 0
0-
-0.4166
0.4998 Fs
Fs
Frequency Response 10 Hz to 20 kHz -0.01 - +0.01 -0.01 - +0.01 dB
StopBand 0.5465 - - 0.5834 - - Fs
StopBand Attenuation (Note 10) 90 - - 64 - - dB
Group Delay  - 12/Fs - - 6.5/Fs - s
Passband Group Delay Deviation 0 - 20 kHz - - ±0.41/Fs - ±0.14/Fs s
De-emphasis Error (Note 11) Fs = 32 kHz
(Relative to 1 kHz) Fs = 44.1 kHz
Fs = 48 kHz
-
-
-
-
-
-
±0.23
±0.14
±0.09
-
-
-
-
-
-
±0.23
±0.14
±0.09
dB
dB
dB
Combined Digital and On-chip Analog Filter Response - Double-Speed Mode - 96 kHz
Passband (Note 9) to -0.01 dB corner
to -3 dB corner 0
0-
-0.4166
0.4998 0
0-
-0.2083
0.4998 Fs
Fs
Frequency Response 10 Hz to 20 kHz -0.01 - 0.01 -0.01 - 0.01 dB
StopBand 0.5834 - - 0.7917 - - Fs
StopBand Attenuation (Note 10) 80 - - 70 - - dB
Group Delay - 4.6/Fs - - 3.9/Fs - s
Passband Group Delay Deviation 0 - 20 kHz - - ±0.03/Fs - ±0.01/Fs s
Combined Digital and On-chip Analog Filter Response - Quad-Speed Mode - 192 kHz 
Passband (Note 9)  to -0.01 dB corner
to -3 dB corner 0
0-
-0.1046
0.4897 0
0-
-0.1042
0.4813 Fs
Fs
Frequency Response 10 Hz to 20 kHz -0.01 - 0.01 -0.01 - 0.01 dB
StopBand 0.6355 - - 0.8683 - - Fs
StopBand Attenuation (Note 10) 90 - - 75 - - dB
Group Delay - 4.7/Fs - - 4.2/Fs - s
Passband Group Delay Deviation 0 - 20 kHz - - ±0.01/Fs - ±0.01/Fs s

12 DS586F1
CS42528
SWITCHING CHARACTERISTICS
(For CQZ, TA = -10 to +70° C; For DQZ, TA = -40 to +85° C; 
VA=VARX = 5 V, VD =VLC= 3.3 V, VLS = 1.8 V to 5.25 V; Inputs: Logic 0 = DGND, Logic 1 = VLS, CL = 30 pF) 
Notes: 12. After powering-up the CS42528, RST should be held low after the power supplies and clocks are set-
tled.
13. See Table 1 on page 26 for suggested OMCK frequencies
14. Limit the loading on RMCK to 1 CMOS load if operating above 24.576 MHz. 
15. Not valid when RMCK_DIV in “Clock Control (address 06h)” on page 53 is set to Multiply by 2.
16. 76.5 ns for Single-Speed and Double-Speed modes, 23 ns for Quad-Speed Mod e. 
Parameters Symbol Min  Typ Max Units
RST Pin Low Pulse Width  (Note 12) 1--ms
PLL Clock Recovery Sample Rate Range 30 - 200 kHz
RMCK Output Jitter (Note 14) - 200 - ps RMS
RMCK Output Duty Cycle (Note 15) 45 50 55 %
OMCK Frequency (Note 13) 1.024 - 25.600 MHz
OMCK Duty Cycle (Note 13) 40 50 60 %
CX_SCLK, SAI_SCLK Duty Cycle 45 50 55 %
CX_LRCK, SAI_LRCK Duty Cycle 45 50 55 %
Master Mode
RMCK to CX_SCLK, SAI_SCLK active edge delay tsmd 0 - 15 ns
RMCK to CX_LRCK, SAI_LRCK delay tlmd 0 - 15 ns
Slave Mode
CX_SCLK, SAI_SCLK Falling Edge to CX_SDOUT, 
SAI_SDOUT Output Valid tdpd -(Note 16) ns
CX_LRCK, SAI_LRCK Edge to MSB Valid tlrpd - 26.5 ns
CX_SDIN Setup Time Before CX_SCLK Rising Edge tds 10 - - ns
CX_SDIN Hold Time After CX_SCLK Rising Edge tdh 30 - - ns
CX_SCLK, SAI_SCLK High Time tsckh 20 - - ns
CX_SCLK, SAI_SCLK Low Time tsckl 20 - - ns
CX_SCLK, SAI_SCLK falling to CX_LRCK, SAI_LRCK 
Edge tlrck -25 - +25 ns
CX_SCLK
SAI_SCLK
(output)
RMCK
tsmd tlmd
CX_LRCK
SAI_LRCK
(output)
sckh sckl
t
t
MSB MSB-1
tdpd
CX_SDOUT
SAI_SDOUT
CX_SDINx
dh
t
ds
t
lrpd
t
lrck
t
CX_SCLK
SAI_SCLK
(input)
CX_LRCK
SAI_LRCK
(input)
Figure 1.  Serial Audio Port Master Mode Timing Figure 2.  Serial Audio Port Slave Mode Timing

DS586F1 13

CS42528

SWITCHING CHARACTERISTICS - CONTROL PORT - I²C FORMAT

(For CQZ, TA = -10 to +70° C; For DQZ, TA = -40 to +85° C; VA=VARX = 5 V, VD =VLS= 3.3 V; VLC = 1.8 V to

5.25 V; Inputs: Logic 0 = DGND, Logic 1 = VLC, CL=30pF)

Notes: 17. Data must be held for sufficient time to bridge the transition time, tfc, of SCL.

18. The acknowledge delay is based on MCLK and can limit the maximum transaction speed.

19. for Single-Speed Mode, for Double-Speed Mode, for Quad-Speed Mode

Parameter Symbol Min Max Unit

SCL Clock Frequency fscl -100kHz

RST Rising Edge to Start tirs 500 - ns

Bus Free Time Between Transmissions tbuf 4.7 - µs

Start Condition Hold Time (prior to first clock pulse) thdst 4.0 - µs

Clock Low time tlow 4.7 - µs

Clock High Time thigh 4.0 - µs

Setup Time for Repeated Start Condition tsust 4.7 - µs

SDA Hold T ime from SCL Falling (Note 17) thdd 0-µs

SDA Setup time to SCL Rising tsud 250 - ns

Rise T ime of SCL and SDA trc -1µs

Fall Time SCL and SDA tfc -300ns

Setup Time for Stop Condition tsusp 4.7 - µs

Acknowledge Delay from SCL Falling (Note 18) tack -(Note 19) ns

256 Fs×

--------------------- 15

128 Fs×

--------------------- 15

64 Fs×

------------------

tbuf thdst

tlow thdd

thigh

tsud

Stop Start

SDA

SCL

tirs

RST

thdst

trc

tfc

tsust

tsus

Start Stop

Repeated

trd tfd

tack

Figure 3. Control Port Timing - I²C Format

14 DS586F1

CS42528

SWITCHING CHARACTERISTICS - CONTROL PORT - SPI™ FORMAT

(For CQZ, TA = -10 to +70° C; For DQZ, TA = -40 to +85° C; VA=VARX = 5 V, VD =VLS= 3.3 V; VLC = 1.8 V to

5.25 V; Inputs: Logic 0 = DGND, Logic 1 = VLC, CL=30pF)

Notes:20. If Fs is lower than 46.875 kHz, the maximum CCLK frequency should be less than 128 Fs. This is

dictated by the timing requirements necessary to access the Channel Status and User Bit buffer

memory. Access to the control registe r file ca n be carrie d ou t at th e full 6 MHz rate. The min imu m

allowable input sample rate is 8 kHz, so choosing CCLK to be less than or equal to 1.024 MHz should

be safe for all possible conditions.

21. Data must be held for sufficient time to bridge the transition time of CCLK.

22. Fo r fsck <1 MHz.

Parameter Symbol Min Typ Max Units

CCLK Clock Frequency (Note 20) fsck 0-6.0MHz

CS High Time Between Transmissions tcsh 1.0 - - µs

CS Falling to CCLK Edge tcss 20 - - ns

CCLK Low Time tscl 66 - - ns

CCLK High Time tsch 66 - - ns

CDIN to CCLK Rising Setup Time tdsu 40 - - ns

CCLK Rising to DATA Hold Time (Note 21) tdh 15 - - ns

CCLK Falling to CDOUT Stable tpd --50ns

Rise Time of CDOUT tr1 --25ns

Fall Time of CDOUT tf1 --25ns

Rise Time of CCLK and CDIN (Note 22) tr2 - - 100 ns

Fall Time of CCLK and CDIN (Note 22) tf2 - - 100 ns

tr2 tf2

tdsu tdh

tsch

tscl

CCLK

CDIN

tcss

tpd

CDOUT

tcsh

Figure 4. Control Port Timing - SPI Format

DS586F1 15
CS42528
DC ELECTRICAL CHARACTERISTICS
(TA = 25° C; AGND=DGND=0, all voltages with respect to ground; OMCK=12.288 MHz; Master Mode)
Notes: 23. Current consumption increases with increasing FS and increasing OMCK. Max values are based on
highest FS and highest OMCK. Variance between speed modes is negligible. 
24. ILC measured with no external loading on  the SDA pin.
25. Power-Down Mode is defined as RST pin = Low with all clock and data lines held static. 
26. Valid with the recommended capacitor values on FILT+ and VQ as show n in Figur e 5.
Parameter Symbol Min Typ Max Units
Power Supply Current normal operation, VA = VARX = 5 V
(Note 23) VD = 5 V
 VD = 3.3 V
Interface current, VLC=5 V (Note 24)
VLS=5 V
power-down state (all supplies) (Note 25)
IA
ID
ID
ILC
ILS
Ipd
-
-
-
-
-
-
75
85
51
250
13
250
-
-
-
-
-
-
mA
mA
mA
µA
mA
µA
Power Consumption (Note 23)
VA=VARX=5 V, VD=VLS=VLC=3.3 V  normal operation
power-down (Note 25)
VA=VARX=5 V, VD=VLS=VLC=5 V normal operation
power-down (Note 25)
-
-
-
-
587
1.25
866
1.25
650
-
960
-
mW
mW
mW
mW
Power Supply Rejection Ratio (Note 26)  (1 kHz)
(60 Hz) PSRR -
-60
40 -
-dB
dB
VQ Nominal Voltage
VQ Output Impedance
VQ Maximum allowable DC current
-
-
-
2.7
50
0.01
-
-
-
V
kΩ
mA
FILT+ Nominal Voltage
FILT+ Output Impedance
FILT+ Maximum allowable DC current
-
-
-
5.0
35
0.01
-
-
-
V
kΩ
mA

16 DS586F1

CS42528

DIGITAL INTERFACE CHARACTERISTICS

(For CQZ, TA = +25° C; For DQZ, TA = -40 to +85° C)

Notes: 27. Serial Port signals include: RMCK, OMCK, SAI_SCLK, SAI_LRCK, SAI_SDOUT, CX_SCLK,

CX_LRCK, CX_SDOUT, CX_SDIN1-4, ADCIN1/2

Control Port signals include: SCL/CCLK, SDA/CDOUT, AD0/CS, AD1/CDIN, INT, RST

S/PDIF-GPO Interface signals include: RXP0, RXP/GPO[1:7]

28. When operating RMCK above 24.576 MHz, limit the loading on the signal to 1 CMOS load.

Parameters (Note 27) Symbol Min Typ Max Units

High-Level Input Voltage Serial Port

Control Port VIH

0.7xVLS

0.7xVLC -

-V

Low-Level Input Voltage Serial Port

Control Port VIL

-0.2xVLS

0.2xVLC V

High-Level Output Voltage at Io=2 mA (Note 28)Serial Port

Control Port

MUTEC, GPOx

TXP VOH

VLS-1.0

VLC-1.0

VA-1.0

VD-1.0

Low-Level Output Voltage at Io=2 mA (Note 28)

Serial Port, Control Port, MUTEC, GPOx,TXP VOL --0.4V

Input Sensitivity, RXP[7:0] VTH -150200mVpp

Input Leakage Current Iin --±10µA

Input Capacita nc e -8-pF

MUTEC Drive Current -3-mA

DS586F1 17

CS42528

2. PIN DESCRIPTIONS

Pin Name # Pin Description

CX_SDIN1

CX_SDIN2

CX_SDIN3

CX_SDIN4

Codec Serial Audio Data Input (Input) - Input for two’s complement serial audio data.

CX_SCLK 2CODEC Serial Clock (Input/Output) - Serial clock for the CODEC serial audio interface.

CX_LRCK 3CODEC Left Right Clock (Input/Output) - Determines which channel, Left or Right, is currently active on

the CODEC serial audio data line.

VD 4

51 Digital Power (Input) - Positive power supply for the digital section.

DGND 5

52 Digital Ground (Input) - Ground reference. Should be connected to digital ground.

VLC 6Control Port Power (Input) - Determines the required signal level for the control port.

SCL/CCLK 7Serial Control Port Clock (Input) - Serial clock for the serial control port. Requires an external pull-up

resistor to the logic interface voltage in I²C mode as shown in the Typical Connection Diagram.

SDA/CDOUT 8Serial Control Data (Input/Output) - SDA is a data I/O line in I²C mode and requires an external pull-up

resistor to the logic interface voltage, as shown in the T ypical Connection Diagram. CDOUT is the output

data line for the control port interface in SPI mode.

AD1/CDIN 9Addre ss Bit 1 (I²C)/ Serial Control Data (SPI) (Input) - AD1 is a chip address pin in I²C mode; CDIN is

the input data line for the control port interface in SPI mode.

AD0/CS 10 Address Bit 0 (I²C)/Control Port Chip Select (SPI) (Input) - AD0 is a chip address pin in I²C mode; CS

is the chip select signal in SPI mode.

17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49

CX_SDIN1

SAI_SCLK

SAI_LRCK

DGND

VLC

SCL/CCLK

SDA/CDOUT

AD1/CDIN

AD0/CS

INT

RST

AINR-

AINR+

AINL+

AINL-

FILT+

REFGND

AOUTB4-

AOUTB4+

AOUTA4+

AOUTA4-

AGND

AOUTB3-

AOUTB3+

AOUTA3+

AOUTA3-

AOUTB2-

AOUTB2+

AOUTA2+

AOUTA2-

AOUTB1-

AOUTB1+

AOUTA1+

AOUTA1-

MUTEC

AGND

VARX

RXP7/GPO7

RXP6/GPO6

RXP5/GPO5

RXP4/GPO4

RXP3/GPO3

RXP2/GPO2

RXP1/GPO1

LPFLT

RXP0

TXP

DGND

VLS

SAI_SDOU

RMCK

CX_SDOUT

ADCIN2

ADCIN1

OMCK

CX_LRCK

CX_SCLK

CX_SDIN4

CX_SDIN3

CX_SDIN2

CS42528

18 DS586F1

CS42528

INT 11 Interrupt (Output) - The CS42528 will generate an interrupt condition as per the Interrupt Mask register.

See “Interrupts” on page 40 for more details.

RST 12 Reset (Input) - The device enters a low power mode and all internal registers are reset to their default

settings when low.

AINR-

AINR+ 13

14 Differential Right Chan nel Analog Input (Input) - Signals are presented differentially to the delta-sigma

modulators via the AINR+/- pins.

AINL+

AINL- 15

16 Differential Lef t Channel Analog Input (Input) - Signals are presented differentially to the delta -sigma

modulators via the AINL+/- pins.

VQ 17 Quiescent Voltage (Output) - Filter connection for internal quiescent reference voltage.

FILT+ 18 Positive Volt age Reference (Output) - Positive reference voltage for the internal sampling circuits.

REFGND 19 Reference Ground (Input) - Ground reference for the internal sampling circuits.

AOUTA1 +,-

AOUTB1 +,-

AOUTA2 +,-

AOUTB2 +,-

AOUTA3 +,-

AOUTB3 +,-

AOUTA4 +,-

AOUTB4 +,-

36,37

35,34

32,33

31,30

28,29

27,26

22,23

21,20

Differential Analog Output (Output) - The full-scale differential analog output level is specified in the

Analog Characteristics specification table.

VARX 24

41 Analog Power (Input) - Positive power supply for the analog section.

AGND 25

40 Analog Ground (Input) - Ground reference. Should be connected to analog ground.

MUTEC 38

Mute Control (Output) - The Mute Control pin outputs high impedance following an initial power-on con-

dition or whenever the PDN bi t is set to a ‘1’, forcing the codec into power-down mode. The signal will

remain in a high impedance state as long as the part is in power-down mode. The Mute Control pin goes

to the selected “active” state during reset, muting, or if the master clock to left/right clock frequency ratio

is incorrect. This pin is intended to be used as a control for external mute circuits to prevent the clicks

and pops that can occur in any single supply system. The use of external mute circuits are not manda-

tory but may be desired for designs requiring the absolute minimum in extraneous clicks and pops.

LPFLT 39 PLL Loop Fi lter (Output) - An RC network should be connected between this pin and ground.

RXP7/GPO7

RXP6/GPO6

RXP5/GPO5

RXP4/GPO4

RXP3/GPO3

RXP2/GPO2

RXP1/GPO1

S/PDIF Receiver Input/ General Purpose Output (Input/Output) - Receiver inputs for S/PDIF encoded

data. The CS42528 has an internal 8:2 multiplexer to select the active receiver port, according to the

Receiver Mode Control 2 register. These pins can also be configured as general purpose output pins,

ADC Overflow indicators or M ute Co ntro l ou t puts ac cor din g to the RXP/Ge n eral Purp os e Pin Con trol

registers.

RXP0 49 S/PDIF Receiver Input (Input) - Dedicated receiver input for S/PDIF encoded data.

TXP 50 S/PDIF Transmitter Output (Output) - S/PDIF encoded data output, mapped directly from one of the

receiver inputs as indicated by the Receiver Mode Control 2 register.

VLS 53 Serial Port Interface Power (Input) - Determines the required signal level for the serial port interfaces.

SAI_SDOUT 54 Serial Audio Interface Serial Data Output (Output) - Output for two’s complement serial audio PCM

data from the S/PDIF incoming stream. This pin can also be configured to transmit the output of the inter-

nal and external ADCs.

RMCK 55 Recovered Ma ster Clock (Output) - Recovered master clock output from the External Clock Reference

(OMCK, pin 59) or the PLL which is locked to the incoming S/PDIF stream or CX_LRCK.

CX_SDOUT 56 CODEC Serial Data Output (Output) - Output for two’s complement serial audio data from the internal

and external ADCs.

ADCIN1

ADCIN2 58

External ADC Serial Input (Input) - The CS42528 provides for up to two external stereo analog to digital

converter inputs to provide a maximum of six channels on one serial data output line when the CS42528

is placed in One-Line Mode.

DS586F1 19

CS42528

OMCK 59 External Reference Clock (Input) - External clock reference that must be within the ranges specified in

the register “OMCK Frequency (OMCK Freqx)” on page 53.

SAI_LRCK 60 Serial Audio Interface Left/Right Clock (Input/Output) - Determines which channel, Left or Right, is

currently active on the serial audio data line.

SAI_SCLK 61 Serial Audio Interface Serial Clock (Input/Output) - Serial clock for the Serial Audio Interface.

20 DS586F1

CS42528

3. TYPICAL CONNECTION DIAGRAM

AOUTA1+

0.1 µF +10 µF

100 µF 0.1 µF

FILT+

0.1 µF 4.7 µF

10 µF

AOUTA1-

AOUTB1+ 35

AOUTB1-

AOUTA2+ 32

AOUTA2-

AOUTB2+ 31

AOUTB2-

AOUTA3+ 28

AOUTA3-

AOUTB3+ 27

AOUTB3-

AOUTA4+ 22

AOUTA4-

AOUTB4+ 21

AOUTB4-

MUTEC 38

DGND DGND

REFGND 19

4VAVD

0.1 µF

AGNDAGND

52 40

LPFLT 39

AINL+

AINL-

AINR+

AINR-

Connect DG N D and AG N D at single point near Codec

0.01 µF

0.1 µF +10 µF

+5 V

0.01 µF

+ 3.3 V to + 5 V +

10 µF 0.1 µF 0.01 µF

VLS

0.1 µF

+2.5 V

to +5 V 53

VLC

0.1 µF

+1.8 V

to +5 V 6

7SCL/CCLK

SDA/CDOUT

AD1/CDIN

RST

OMCK

CX_SDIN1

SAI_LRCK

SAI_SCLK

CX_SDIN3

CX_SDIN2

CX_SDIN4

CX_LRCK

CX_SCLK

AD0/CS

INT

D igital A u dio

Processor

Micro-

Controller

55 RMCK

58 ADCIN1

57 ADCIN2

CS5361

A/D Converter

CS5361

A/D C onverter

56 CX_SDOUT

54 SAI_SDOUT

RXP0

RXP1/GPO1

S/PDIF

Interface

50 TXP

Driver

U p to 8

Sources

RXP2/GPO2

RXP3/GPO3

RXP4/GPO4

RXP5/GPO5

RXP6/GPO6

RXP7/GPO7

OSC

Analog Output Buffer 2

and

M ute Circuit (optional)

Analog Output Buffer 2

and

M ute Circuit (optional)

Analog Output B uffer 2

and

M ute Circuit (optional)

Analog Output Buffer 2

and

M ute Circuit (optional)

Analog Output B uffer 2

and

M ute Circuit (optional)

Analog Output Buffer 2

and

M ute Circuit (optional)

Analog Output Buffer 2

and

M ute Circuit (optional)

Analog Output B uffer 2

and

M ute Circuit (optional)

Mute

Drive

(optional)

+VA

** Pull up or down as

required on startup if the

M ute Control is used.

2700 pF*

Left Analog Input

Right Analog Inpu

Analog

Input

Buffer 1

Analog

Input

Buffer 1

CFILT 3

RFILT 3

CRIP 3

2 kΩ2 kΩ

** **

** Resistors are required for

I2C control port operation

1. See the AD C Input Filter section in the Appe ndix.

2. See the DA C O utput F ilter section in the Appendix.

3. See the PLL Filter section in the Appendix.

Figure 5. Typical Connection Diagram

CS42528

DS586F1 21
CS42528
4. APPLICATIONS
4.1 Overview
The CS42528 is a highly integrated mixed-signal 24-bit audio codec comprised of 2 analog-to-digital con-
verters (ADC), implemented using multi-bit delta-sigma techniques, 8 digital-to-analog converters (DAC)
and a 192 kHz digital audio S/PDIF receiver. Other functions integrated within the codec include indepen-
dent digital volume contr ols for each DAC, digital  de-em phasis filters for  DAC and  S/PDIF, digital gain con-
trol for ADC channels, ADC high-pass filters, an on-chip voltage reference, and an 8:2 mux for S/PDIF
sources. All serial data is transmitted through two configurable serial audio interfaces with standard serial
interface support as well as enhanced one-line modes of operation, allowing up to 6 channels of serial audio
data on o ne data lin e. All func tions ar e configur ed thr ough a serial control port operable in SPI mode or in
I²C mode. Figure 5 shows the recommended connections for the CS42528.
The CS42528 operates in one of three oversampling modes based on the input sample rate. Mode selection
is determined by the FM bits in register “Functional Mode (address 03h)” on page 48. Single-Speed Mode
(SSM) supports input sample rates u p to 50 kHz and  uses a 12 8x oversamplin g ratio. Double -Speed Mod e
(DSM) supports input sample rates up to 100 kHz and uses an oversampling ratio of 64x. Quad-Speed
Mode (QSM) supports input sample rates up to 192 kHz and uses an oversampling ratio of 32x.
Using the receiver clock recovery PLL, a low-jitter clock is recovered from the incoming S/PDIF data stream.
The recovered clock or an externally supplied clock attached to the OMCK pin can be used as the System
Clock.
4.2 Analog Inputs
4.2.1 Line-Level Inputs
AINR+, AINR-, AINL+, and AINL- are the line-level differential analog inputs. The analog signal must be
externally biased to VQ, appro ximately 2.7 V, before being applied to these inputs. The level of the signal
can be adjusted for the left and right ADC independently through the ADC Left and Right Channel Gain
Control Registers on page 61. The ADC output data is in two’s complement binary format. For inputs
above positive full scale or below negative full scale, the ADC will output 7FFFFFH or 800000H, respec-
tively and cause the ADC Overflow bit in the register “Interrupt Status (address 20h) (Read Only)” on
page 63 to be set to a ‘1’. The RXP/GPO pins may also be configured to indicate an overflow condition
has occurred in the ADC. See “RXP/General-Purpose Pin Control (addresses 29h to 2Fh)” on page 69
for proper configuration. Figure 6 shows the full-scale analog input levels. See “ADC Input Filter” on
page 73 for a recommended input buffer. 
AIN+
AIN-
Fu ll-S c a le Input L e v e l=  ( AIN+)  - (A IN-)= 5 .6  V p p
4.1 V
2.7 V
1.3 V
4.1 V
2.7 V
1.3 V
Figure 6.  Full-Scale Analog Input

22 DS586F1
CS42528
4.2.2 High-Pass Filter and DC Offset Calibration
The high-pass filter continuously subtracts a measure of the DC offset from the output of the decimation
filter. The high-pa ss filter can be indep endently enab led and di sabled. If the HPF_Freeze bit is se t during
normal operat ion , the curr ent va lue of  the DC of fset for the corresponding channel is frozen and this DC
offset will continue to be subtracted from the conversion result. This feature makes it possible to perform
a system DC offset calibration by:
1. Running the CS42528 with the high-pass filter  enabled until the filter settles. See the Digital Filter 
Characteristics for filter settling time. 
2. Disabling the high-pass filter and freezing the stored DC offset.
The high-pass filters are controlled using the HPF_FREEZE bit in the register “Misc Control (address
05h)” on page 51.
4.3 Analog Outputs
4.3.1 Line-Level Outputs and Filtering
The CS42528 contains on-chip buffer amplifiers capable of producing line-level differential outputs. These
amplifiers are biased to a quiescent DC level of approximately VQ. 
The delta-sigma conve rsion process produces high- frequency noise beyo nd the audio passban d, most of
which is removed by the  on-chi p analog  filters. The remaining ou t-of-band  noise can be  attenua ted using
an off-chip low-pass filter. See “DAC Output Filter” on page 73 for a recommended output buffer. This filter
configuration accounts for the normally differing AC loads on the AOUT+ and AOUT- differential output
pins. It also shows an AC coupling configuration which minimizes the number  of required  AC coupling ca-
pacitors. Figure 7 shows the full-scale analog output levels. 
4.3.2 Interpolation Filter
To accommodate the increasing ly complex re qu irement s of digita l audio systems, the CS425 28 inco rp o-
rates selectable interpolation filters for each mode of operation. A “fast” and a “slow” roll-off filter is avail-
able in Single-, Double-, and Quad-Speed Modes. These filters have been designed to accommodate a
variety of musical tastes and styles. The FILT_SEL bit found in the register “Misc Control (address 05h)”
on page 51 selects which filter is used. Filter response plots can be found in Figures 46 to 69.
AOUT+
AOUT-
Full-Scale Output Level= (AIN+) - (AIN-)= 5 Vpp
3.95 V
2.7 V
1.45 V
3.95 V
2.7 V
1.45 V
Figure 7.  Full-Scale Output

DS586F1 23
CS42528
4.3.3 Digital Volume and Mute Control
Each DAC’s output level is controlled via the Volume Control registers operating over the range of 0 to
-127 dB attenuation with 0.5 dB resolution. See “Volume Control (addresses 0Fh, 10h, 11h, 12h, 13h,
14h, 15h, 16h)” on page 58. Volume control changes are programmable to ramp in increments of
0.125 dB at the rate controlled by the SZC[1:0] bits in the Digital Volume Control register. See “Volume
Transition Control (address 0Dh)” on page 56.
Each output can be independently muted via mute control bits in the register “Channel Mute (address
0Eh)” on page 58. When enabled, each XX_MUTE b it attenuates the corresponding DAC to its maximum
value (-127 dB). When the XX_MUTE bit is disabled, the corresponding DAC returns to the attenuation
level set in the Volume Control register. The attenuation is ramped up and down at the rate specified by
the SZC[1:0] bi ts.
The Mute Control pin, MUTEC, is typically connected to an external mute control circu it. The Mute Control
pin outputs high impedance during Power-Up or in Power-Down Mode by setting the PDN bit in the reg-
ister “Power Control (address 02h)” on page 47 to a ‘1’. Once out of Power-Down Mode, the pin can be
controlled by the user via th e control por t, or automa tically asserted high wh en zero data is prese nt on all
DAC inputs, or when serial port clock errors are present. To prevent large transients on the output, it is
desirable to mute the DAC outputs before the Mute Control pin is asserted. Please see the MUTEC pin
in the Pin Descriptions section for more information.
Each of the RXP 1/GPO1-RXP7/GPO7 can  be programmed to provide a hardware MUTE signal to indi-
vidual circu its . Wh en  n ot  us ed  a s an  S/ PDIF in pu t, each pin can be programmed as an output, with spe-
cific muting capabilities as defined by the function bits in the register “RXP/General-Purpose Pin Control
(addresses 29h to 2Fh)” on page 69. 
4.3.4 ATAPI Specification
The CS42528 implements the channel-mixing functions of the ATAPI CD-ROM specification. The
ATAPI functions are applied per A-B pair. Refer to T able 16 on page 60 and Figure 8 for additional infor-
mation.
            
ΣΣ
A Channel
Volume
Control AOUTAx
AOUTBx
Left Channel
Audio Data
Right Channel
Audio Data
BChannel
Volume
Control
MUTE
MUTE
CX_SDINx
Figure 8.  ATAPI Block Diagram (x = channel pair 1, 2, 3, 4)

24 DS586F1
CS42528
4.4 S/PDIF Receiver
The CS42528 includes an S/PDIF digital audio receiver. The S/PDIF receiver accepts and decodes digital
audio data according to the IEC60 958  (S/PDIF) , and EIAJ CP-1 201 interface standards. The receiver con-
sists of an 8:2 multiplexer input stage driven through pins RXP0 and RXP1/GPO1 - RXP7/GPO7, a PLL
based clock recovery circuit, and a decoder which separates the audio data from the channel status and
user data. A compr ehensive buffering scheme provides r ead access to the channel status and user data.
External components are used to ter minate and isolate the in coming data cab les from the CS4252 8. These
components and required circuitry are detailed in the CDB42528.
4.4.1 8:2 S/PDIF Input Multiplexer
The CS42528 contains an  8:2 S/PDIF Input Multiplexer to accommodate up to eigh t channels of input dig-
ital audio data. Digital audio data is single-ended and input through the RXP0 and
RXP1/GPO1-RXP7/GPO7 pins. Any one of these inputs can be multiplexed to the input of the S/PDIF
receiver and to the S/PDIF output pin TXP. 
When any portion of the multiplexer is implemented, unused RXP0 and RXPx/GPOx pins should be tied
to a 0.01uF capacitor to ground. The receiver multiplexer select line control is accessed through bits
RMUX2:0 in the Receiver Mode Control 2 register on page 63. The TXP multiplexer select line control is
accessed through bits TMUX2:0 in  the same register. The multiplexer defaults to RXP0 for  both functions.
4.4.2 Error Reporting and Hold Function
While decoding the incoming S/PDIF data stream, the CS42528 can identify several kinds of error, indi-
cated in the register “Receiver Errors (address 26h) (Read Only)” on page 67. See “Err or Re port ing an d
Hold Function” on page 74 for more information.
4.4.3 Channel Status Data Handling
The first 2 bytes of  the Channel Sta tus block (C data)  are decoded in to the Receiver Cha nnel Status re g-
ister (See “Receiver Channel Status (add ress 25h) (Re ad Only)” on page 66). See “Channel Sta tus Data
Handling” on page 74 for more information.
4.4.4 User Data Handling
The incoming User (U) data is buffered in a user accessible buffer. If the U data bits have been encoded
as Q-channel subcode, the data is decoded and presented in 10 consecutive register locations, address
30h to 39h. The  user can configu re the In terr upt Mask  Register  to cause  interrupts  to ind icate  the decod-
ing of a new Q-channel block, which may be read through the control port. See “User (U) Data E Buffer
Access” on page 76 for more information.
4.4.5 Non-Audio Auto-Detection
A S/PDIF data stream may be used to convey non-audio data, thus it is important to know whether the
incoming data stream is digital PCM audio sa mples or not. This information is typically conveyed  in chan-
nel status bit  1 (AUDIO), which is extracted automatically by the CS42528. Certain non-audio sources,
however, such as AC-3® or MPEG encoders, may not adhere to this convention, and the bit may not be
properly set. See “Non-Audio Auto-Detection” on page 76 for more information including details for inter-
face format detection.

DS586F1 25

CS42528

4.5 Clock Generation

The clock generation for the CS42528 is shown in the figure below. The internal MCLK is derived from the

output of the PLL or a master clock source attached to OMCK. The mux selection is controlled by the

SW_CTRLx bits and can be configured to manual switch mode only, or au tomatically switch on loss of PL L

lock to the other source input.

4.5.1 PLL and Jitter Attenuation

An on-chip Phase Locked Loop (PLL) is used to recover the clock from the incom ing S/PDIF data stream.

There are some applications wher e low jitter in the recovered clock, presented on the RMCK pin, is im-

portant. For this reason, the PLL has been designed to have good jitter attenuation characteristics as

shown in Figure 28 on page 79.

The PLL can be configured to lock onto the incoming SAI_L RCK signal from the Serial Audio Interface

Port and generate the required internal master clock frequency. By setting the PLL_LRCK bit to a ‘1’ in

the regist er “Clock Control (address 06h)” on page 53, the PLL will lock to the incoming SAI_LRCK and

generate an output maste r clock (RMCK) of 256Fs. Table 2 shows the output of th e PLL with typical input

Fs values for SAI_LRCK.

See “Appendix C: PLL Filter” on page 77 for more information concerning PLL operation, required filter

components, optimal layout guidelin es, and jitter-attenuation characteristics.

SAI_LRCK

(slave mode)

Recovered

S/PDIF Clock 0

PLL (256Fs)

8.192 -

49.152 MHz

PLL_LRCK bit SW_CTRLx bits

(manual or auto

switch)

OMCK

Auto Detect

Input Clock

1,1.5, 2, 4

single

speed

256

double

speed

128

quad

speed

single

speed

double

speed

quad

speed

not OLM

OLM #1

CODEC_FMx bits

SAI_FMx bits

DAC_OLx

or ADC_OLx bits

ADC_OLx and

ADC_SP SELx bits

SAI_SCLK

CX_SCLK

CX_LRCK

SAI_LRCK

RMCK

OLM #2

not OLM

OLM #1

OLM #2

128FS

256FS

128FS

256FS

Internal

MCLK

RMCK_DIVx bits

Figure 9. CS42528 Clock Generation

26 DS586F1

CS42528

4.5.2 OMCK System Clock Mode

A special clock-switching mode is available that allows the clock that is input thro ugh the OMCK pin to be

used as the internal master clock. This feature is controlled by the SW_CTRLx bits in register “Clock Con-

trol (address 06h )” o n p age 53. An advanced au to -switching mod e is also imple men ted to main ta in mas-

ter clock functionality. The clock auto-switching mode allows the clock input through OMCK to be used as

a clock in the sys tem w ithout a ny disruptio n when the PLL loses lock, for example, when the input is re-

moved from the receiver. This clock-switching is done glitch-free. A clock adhering to the specifications

detailed in the Switching Characteristics ta ble on page 12 must be applied to the OMCK pin at all times

that the FRC_PLL_ LK bit is set to ‘0’ (See “Force PLL Lock (FRC_ PLL_ L K )” on page 54).

4.5.3 Master Mode

In Master Mode, the seri al interface timing s are derive d from an extern al clock attached to OMCK or fr om

the output of the PLL with an input reference to either the S/PDIF Receiver recovered clock or the

SAI_LRCK input from the Serial Audio Inte rface Port. Master clock selection and operation is configured

with the SW_CTRL1:0 bits in the Clock Control Register (See “Clock Control (address 06h)” on

page 53).The supported PLL output frequencies are shown in Table 2 below.

4.5.4 Slave Mode

In Slave Mode, CX_LRCK, CX_SCLK and/or SAI_LRCK, SAI_SCLK operate as inputs. The Left/Right

clock signal must be equal to the sample rate, Fs, and must be synchronously derive d from the supplied

master clock, OMCK, or the output of the PLL. The serial bit clock, CX_SCLK and/or SAI_SCLK, must be

synchronously derived from the master clock and be equal to 128x, 64x, 48x or 32x Fs, depending on the

interface format selected and desired speed mode.

When the device is clocked from OMCK, the frequency of OMCK must be at least twice the frequency of

the fastest Slave Mode, SCLK. For example, if both serial ports are in Slave Mode with one SCLK running

at 32x Fs and the other at 64x Fs, the slowest OMCK signal that can be used to clock the device is

128x Fs.

Sample

Rate

(kHz)

OMCK (MHz)

Single-Speed

(4 to 50 kHz) Double-Speed

(50 to 100 kHz) Quad-Speed

(100 to 192 kHz)

256x 384x 512x 128x 192x 256x 64x 96x 128x

48 12.2880 18.4320 24.5760 - - - - - -

96 - - - 12.2880 18.4320 24.5760 - - -

192 - - - - - - 12.2880 18.4320 24.5760

Table 1. Common OMCK Clock Frequencies

Sample

Rate

(kHz)

PLL Output (MHz)

Single Speed

(4 to 50 kHz) Double Speed

(50 to 100 kHz) Quad Speed

(100 to 192 kH z)

256x 256x 256x

32 8.1920 - -

44.1 11.2896 - -

48 12.2880 - -

64 - 16.3840 -

88.2 - 22.5792 -

96 - 24.5760 -

176.4 - - 45.1584

192 - - 49.1520

Table 2. Commo n PLL Output Clock Frequencies

DS586F1 27
CS42528
When either serial port is in Slave Mode, its respective LRCK signal must be present for proper device
operation.
In Slave Mode, One-Line Mode #1 is supported; One-Line Mode #2 is not.
The sample rate to OM CK ratios and OMCK frequency require ments for Slave Mode operation are shown
in Table 1. Refer to Table 3 for required clock ratios. 
4.6 Digital Interfaces
4.6.1 Serial Audio Interface Signals
The CS42528 interfaces to an external Digital Audio Processor via two independent serial ports, the
CODEC serial port, CODEC_SP and the Serial Audio Interface serial port, SAI_SP. The digital output of
the internal ADCs can be configured to use either the CX_SDOUT pin or the SAI_SDOUT pin and the
corresponding serial port clocking signals. These configuration bits and the selection of Single-, Double-
or Quad-Speed Mode fo r CODEC_SP and SAI_SP are found in register  “Functional Mode (addre ss 03h)”
on page 48. 
The serial interface clocks, SAI_SCLK for SAI_SP and CX_SCLK for CODEC_SP, are used for tr ansmit-
ting and receiving audio data. Ei ther SAI_SCL K or CX_S CLK can b e gen erated by th e CS4252 8 (Master
Mode), or it can b e  input fro m a n exte rn al  so urce   (Slave Mode). Master or Slave Mode selection is made
using bits CODEC_SP M/S and SAI_SP M/S in register “Misc Control (address 05h)” on page 51. 
The Left/Right clock (SAI_LRCK or CX_LRCK) is used to indicate left and righ t data frames and the sta rt
of a new sample period. It may be an output of the CS42528 (Master Mode), or it may be generated by
an external source (Slave Mode). As described in later sections, particular modes of operation do allow
the sample rate, Fs, of the SAI_SP and the CODEC_SP to be different, but must be multiples of each
other.
The serial data interface format selection (Left/Right-Justified, I²S or One-Line M ode) for  the Serial  Audio
Interface serial port data out pin, SAI_SDOUT, the CODEC serial port data out pin, CX_SDOUT, and the
CODEC input pins, CX_SDIN1:4, is configured using the appropriate bits in the register “Interface For-
mats (address 04h )” on page 50. The serial audio data is presented in two's comple ment binary form with
the MSB first in all formats.
CX_SDIN1, CX_SDIN2, CX_SDIN3 and CX_SDIN4 are the serial data input pins supplying the  associat-
ed internal DAC. CX_SDOUT, the ADC data output pin, carries data from the two internal 24-bit ADCs
and, when configured for one-line mode, up to four additional ADC channels attached externally to the
signals ADCIN1 and ADCIN2 (typically two CS5361 stereo ADCs). When operated in One-Line Mode,
6 channels of DAC data are input on CX_SDIN1, two additional DAC channels on CX_SDIN4, and 6 chan-
nels of ADC data are output on CX_SDOUT. Table 4 on page 28 outlines the serial port channel alloca-
tions.
Single-Speed Double-Speed Quad-Speed One-Line Mode #1
OMCK/LRC K R atio 256x, 384x, 512x 128x, 192x, 256x 64x, 96x, 128x 256x
SCLK/LRCK Ratio 32x, 48x, 64x, 128x 32x, 48x, 64x 32x, 48x, 64x 128x
Table 3. Slave Mode Clock Ratios

28 DS586F1

CS42528

Serial Inputs / Outputs

CX_SDIN1 left channel

right channel

One-Line Mode

DAC #1

DAC #2

DAC channels 1,2,3,4 ,5 ,6

CX_SDIN2 left channel

right channel

One-Line Mode

DAC #3

DAC #4

not used

CX_SDIN3 left channel

right channel

One-Line Mode

DAC #5

DAC #6

not used

CX_SDIN4 left channel

right channel

One-Line Mode

DAC #7

DAC #8

DAC channels 7,8

CX_SDOUT left channel

right channel

One-Line Mode

ADC #1

ADC #2

ADC channels 1,2,3,4 ,5 ,6

SAI_SDOUT left channel

right channel

One-Line Mode

S/PDIF Left or ADC #1

S/PDIF Right or ADC #2

ADC channels 1,2,3,4 ,5 ,6

ADCIN1 left channel

right channel External ADC #3

External ADC #4

ADCIN2 left channel

right channel External ADC #5

External ADC #6

Table 4. Serial Audio Port Chan nel Allocations

DS586F1 29

CS42528

4.6.2 Serial Audio Interface Formats

The CODEC_SP and SAI_SP digital audio serial ports support five formats with varying bit depths from

16 to 24 as shown in Figures 10 to 14. These formats are selected usi ng the configuration bits in the reg-

isters, “Functional Mode (address 03h)” on page 48 and “Interface Formats (address 04h)” on page 50.

For the diagram s below, Single-Speed Mo de is equivalent to Fs = 32, 44.1, 48 kHz; Double-Speed Mode

is for Fs = 64, 88.2, 96 kHz; and Quad-Speed Mode is for Fs = 176.4, 196 kHz.

Left Channel Right Channel

CX_SDINx

CX_SDOUT

SAI_SDOUT +3 +2 +1+5 +4

-1 -2 -3 -4 -5 +3 +2 +1+5 +4

-1 -2 -3 -4

MSB MSB

LSB LSB

CX_LRCK

SAI_LRCK

CX_SCLK

SAI_SCLK

Figure 10. I²S Serial Audio Formats

I²S Mode, Data Valid on Rising Edge of SCLK

Bits/Sample SCLK Rate(s) Notes

Master Slave

16 64 48, 64, 128 Fs Single-Speed Mode

64 Fs 64 Fs Double-Speed Mode

64 Fs 64 Fs Quad-S peed Mode

18 to 24 64, 128, 256 Fs 48, 64, 128 Fs Single-Speed Mode

64 Fs 48, 64 Fs Double-Speed Mode

64 Fs 48, 64 Fs Quad-Speed Mode

30 DS586F1

CS42528

CX_LRCK

SAI_LRCK

CX_SCLK

SAI_SCLK

Left Channel Right Channel

CX_SDINx

CX_SDOUT

SAI_SDOUT +3 +2 +1+5 +4

-1 -2 -3 -4 -5 +3 +2 +1+5 +4

-1 -2 -3 -4

MSB LSB MSB LSB

Figure 11. Left-Justified Serial Audio Formats

Left-Justified Mode, Data Valid on Rising Edge of SCLK

Bits/Sample SCLK Rate(s) Notes

Master Slave

16 64 32, 48, 64, 128 Fs Single-Speed Mode

64 Fs 32, 64 Fs Double-Speed Mode

64 Fs 32, 64 Fs Quad-Speed Mode

18 to 24 64, 128, 256 Fs 48, 64, 128 Fs Single-Speed Mode

64 Fs 48, 64 Fs Double-Speed Mode

64 Fs 48, 64 Fs Quad-Speed Mode

Left Channel Right Channel

6543210987

15 14 13 12 11 10 6543210987

15 14 13 12 11 10

CX_SDINx

CX_SDOUT

SAI_SDOUT

CX_LRCK

SAI_LRCK

CX_SCLK

SAI_SCLK

Figure 12. Right-Justified Serial Audio Formats

Right-Justified Mode, Data Valid on Rising Edge of SCLK

Bits/Sample SCLK Rate(s) Notes

Master Slave

16 64 32, 48, 64, 128 Fs Single-Speed Mode

64 Fs 32, 64 Fs Double-Speed Mode

64 Fs 32, 64 Fs Quad-Speed Mode

24 64, 128, 256 Fs 48, 64, 128 Fs Single-Speed Mode

64 Fs 48, 64 Fs Double-Speed Mode

64 Fs 48, 64 Fs Quad-Speed Mode

DS586F1 31

CS42528

Figure 13. One-Line Mode #1 Serial Audio Format

One-Line Data Mode #1, Data Valid on Rising Edge of SCLK

Bits/Sample SCLK Rate(s) Notes

Master Slave

20 128 Fs 128 Fs Single-Speed Mode

128 Fs 128 Fs Double-Speed Mode

CX_LRCK

SAI_LRCK

CX_SCLK

SAI_SCLK LSBMSB

20 clks

64 clks 64 clks

LSBMSB LSBMSB LSBMSB LSBMSB LSBMSB MSB

DAC1 DAC3 DAC5 DAC2 DAC4 DAC6

20 clks 20 clks 20 clks 20 clks 20 clks

Left Channel Right Channel

20 clks

DAC7 DAC8

20 clks

CX_SDIN4

20 clks

ADC1 ADC3 ADC5 ADC2 ADC4 ADC6

20 clks 20 clks 20 clks 20 clks 20 clks

CX_SDOUT

SAI_SDOUT

CX_SDIN1

LSBMSB

24 clks

128 clks

LSBMSB LSBMSB LSBMSB LSBMSB LSBMSB MSB

DAC1 DAC3 DAC5 DAC2 DAC4 DAC6

24 clks 24 clks 24 clks 24 clks 24 clks

Left Channel Right Channel

24 clks

DAC7 DAC8

24 clks

ADC1 ADC3 ADC5 ADC2 ADC4 ADC6

24 clks 24 clks 24 clks 24 clks 24 clks

128 clks

CX_LRCK

SAI_LRCK

CX_SCLK

SAI_SCLK

CX_SDOUT

SAI_SDOUT

CX_SDIN1

CX_SDIN4

Figure 14. One- Line Mode #2 Serial Audi o Format

One-Line Data Mode #2, Data Valid on Rising Edge of SCLK

Bits/Sample SCLK Rate(s) Notes

Master Slave

24 256 Fs Not supported Single-Speed Mode

32 DS586F1

CS42528

4.6.3 ADCIN1/ADCIN2 Serial Data Format

The two serial data lines which interface to the optional external ADCs, ADCIN1 and ADCIN2, support

only left-justified, 24-bit samples at 64Fs or 128Fs. This interface is not affected by any of the serial port

configuration register bit settings. These serial data lines are used when supporting One-Line Mode of

operation with external ADCs attached. If these signals are not being used, they should be tied together

and wired to GND via a pull-down resistor.

For proper o peration, the CS42528 must be configu red to select which SCLK/LRCK is being used to clock

the external ADCs. The EXT ADC SCLK bit in register “Misc Control (address 05h)” on page 51 must be

set accordingly. Set this bit to ‘1’ if the external ADCs are wired using the CODEC_SP clocks. If the ADCs

are wired to use the SAI_SP clocks, set this bit to ‘0’.

CX_LRCK

SAI_LRCK

CX_SCLK

SAI_SCLK

Left Channel Right Channel

ADCIN1/2 +3 +2 +1+5 +4

-1 -2 -3 -4 -5 +3 +2 +1+5 +4

-1 -2 -3 -4

MSB LSB MSB LSB

Figure 15. ADCIN1/ADCIN2 Serial Audio Format

Left-Justified Mode, Data Valid on Rising Edge of SCLK

Bits/Sample SCLK Rate(s) Notes

24 64, 128 Fs Single-Speed Mode, Fs= 32, 44.1, 48 kHz

64 Fs Double-Speed Mode, Fs= 64, 88.2, 96 kHz

not supported Quad-Speed Mode, Fs= 176.4, 192 kHz

DS586F1 33

CS42528

4.6.4 One-Line Mode (OLM) Configurations

4.6.4.1 OLM Config #1

One-Line Mode Configuration #1 can support up to 8 channels of DAC data, 6 channels of ADC data and

2 channels of S/PDIF received data. This is the only configuration which will support up to 24-bit samples

at a sampling frequency o f 48 kHz on all channels for both the DAC and ADC.

Functional Mode Register (addr = 03h)

Set CODEC_FMx = SAI_FMx = 00,01,10 CX_LRCK must equal SAI_LRCK; sample rate conversion not supported

Set ADC_SP SELx = 00 Configure ADC data on CX_SDOUT, S/PDIF data on SAI_SDOUT

Interface Format Register (addr = 04h)

Set DIFx bits to proper serial format Select the digital interface format when not in One-Line Mode

Set ADC_OLx bits = 00,01,10 Select ADC operating mode, see table below for valid combinations

Set DAC_OLx bits = 00,01,10 Select DAC operating mode, see table below for valid combinations

Misc. Control Register (addr = 05h)

Set CODEC_SP M/S = 1 Configure CODEC Serial Port to master mode.

Set SAI_SP M/S = 1 Configure Serial Audio Interface Port to master mode.

Set EXT ADC SCLK = 0 Identify external ADC clock source as SAI Serial Port.

DAC Mode

Not One-Line Mode One-Line Mode #1 One-Line Mode #2

ADC Mode

Not One-

Line Mode

CX_SCLK=64 Fs

CX_LRCK=SSM/DSM/QSM

SAI_SCLK=64 Fs

SAI_LRCK=CX_LRCK

CX_SCLK=128 Fs

CX_LRCK=SSM/DSM

SAI_SCLK=64 Fs

SAI_LRCK=CX_LRCK

not valid

One-Line

Mode #1

CX_SCLK=128 Fs

CX_LRCK=SSM/DSM

SAI_SCLK=64 Fs

SAI_LRCK=CX_LRCK

CX_SCLK=128 Fs

CX_LRCK=SSM/DSM

SAI_SCLK=64 Fs

SAI_LRCK=CX_LRCK

not valid

One-Line

Mode #2

CX_SCLK=256 Fs

CX_LRCK=SSM

SAI_SCLK=64 Fs

SAI_LRCK=CX_LRCK

not valid

CX_SCLK=256 Fs

CX_LRCK=SSM

SAI_SCLK=64 Fs

SAI_LRCK=CX_LRCK

SCLK_PORT1

LRCK_PORT1

SDIN_PORT1

SCLK_PORT2

LRCK_PORT2

SDIN_PORT2

SCLK_PORT3

LRCK_PORT3

SDOUT1_PORT3

SDOUT2_PORT3

SDOUT3_PORT3

SDOUT4_PORT3

SAI_SCLK

SAI_LRCK

SAI_SDOUT

CX_SCLK

CX_LRCK

CX_SDOUT

CX_SDIN1

CX_SDIN2

CX_SDIN3

CX_SDIN4

RMCK

ADCIN1

ADCIN2

MCLK

SDOUT1

SDOUT2

LRCK

SCLK

64Fs

SPDIF Data

ADC Data

64Fs,128Fs, 256Fs

DIGITAL AUDIO

PROCESSOR

CS5361

MCLK

Figure 16. OLM Configuration #1

CS42528

34 DS586F1

CS42528

4.6.4.2 OLM Config #2

This configuration will support up to 8 channels of DAC data or 6 channels of ADC data and no channels

of S/PDIF received data and will handle up to 20-bit samples at a sampling-frequency of 96 kHz on all chan-

nels for both the DAC a nd ADC. The output data strea m of the intern al and exte rnal ADCs is configur ed to

use the SAI_SDOUT output and run at the SAI_SP clock speeds.

Functional Mode Register (addr = 03h)

Set CODEC_FMx = SAI_FMx = 00,01,10 CX_LRCK must equal SAI_LRCK; sample rate conversion not supported

Set ADC_SP SELx = 10 Configure ADC data to use SAI_SDOUT and SAI_SP Clocks. S/PDIF data

is not supported in this configuration

Interface Format Register (addr = 04h)

Set DIFx bits to proper serial format Select the digital interface format when not in one line mode

Set ADC_OLx bits = 00,01,10 Select ADC operating mode, see table below for valid combinations

Set DAC_OLx bits = 00,01 Select DAC operating mode, see table below for valid combinations

Misc. Control Register (addr = 05h)

Set CODEC_SP M/S = 1 Set CODEC Serial Port to master mode.

Set SAI_SP M/S = 1 Set Serial Audio Interface Port to master mode.

Set EXT ADC SCLK = 1 Identify external ADC clock source as CODEC Serial Port.

CX_SDOUT= not used

SAI_SDOUT=ADC Data DAC Mode

Not One-Line Mode One-Line Mode #1 One-Line Mode #2

ADC Mode

Not One-

Line Mode

CX_SCLK=64 Fs

CX_LRCK=SSM/DSM/QSM

SAI_SCLK=64 Fs

SAI_LRCK=CX_LRCK

CX_SCLK=128 Fs

CX_LRCK=SSM

SAI_SCLK=64 Fs

SAI_LRCK=CX_LRCK

not valid

One-Line

Mode #1

CX_SCLK=64 Fs

CX_LRCK=SSM/DSM

SAI_SCLK=128 Fs

SAI_LRCK=CX_LRCK

CX_SCLK=128 Fs

CX_LRCK=SSM

SAI_SCLK=128 Fs

SAI_LRCK=CX_LRCK

not valid

One-Line

Mode #2

CX_SCLK=64 Fs

CX_LRCK=SSM

SAI_SCLK=256 Fs

SAI_LRCK=CX_LRCK

not valid not valid

SCLK_PORT1

LRCK_PORT1

SDIN_PORT1

SCLK_PORT2

LRCK_PORT2

SDIN_PORT2

SCLK_PORT3

LRCK_PORT3

SDOUT1_PORT3

SDOUT2_PORT3

SDOUT3_PORT3

SDOUT4_PORT3

RMCK

ADCIN1

ADCIN2

MCLK

SDOUT1

SDOUT2

LRCK

SCLK

64Fs,128Fs

ADC Data

64Fs,128Fs,

256Fs

DIGITAL AUDIO

PROCESSOR

CS5361

SAI_SCLK

SAI_LRCK

SAI_SDOUT

CX_SCLK

CX_LRCK

CX_SDOUT

CX_SDIN1

CX_SDIN2

CX_SDIN3

CX_SDIN4

MCLK

Figure 17. OLM Configuration #2

CS42528

DS586F1 35

CS42528

4.6.4.3 OLM Config #3

This One Line Mode configuration #3 will support up to 8 channels of DAC data, 6 channels of ADC data and 2

channels of S/PDIF received data and will handle up to 20-bit samples at a sampling frequency of 48 kHz on all

channels for both the DAC and ADC. The output dat a stream of the internal and external ADCs is configured to use

the CX_SDOUT output and run at the CODEC_SP clock speeds. One Line Mode #2, which supports 24-bit sam-

ples, is not supported by this configuration.

Functional Mode Register (addr = 03h)

Set CODEC_FMx = SAI_FMx = 00,01,10 CX_LRCK must equal SAI_LRCK; sample rate conversion not supported

Set ADC_SP SELx = 00 Configure ADC data to use CX_SDOUT and CODEC_SP Clocks. S/PDIF

data is supported on SAI_SDOUT

Interface Format Register (addr = 04h)

Set DIFx bits to proper serial format Select the digital interface format when not in one line mode

Set ADC_OLx bits = 00,01 Select ADC operating mode, see table below for valid combinations

Set DAC_OLx bits = 00,01 Select DAC operating mode, see table below for valid combinations

Misc. Control Register (addr = 05h)

Set CODEC_SP M/S = 1 Set CODEC Serial Port to master mode.

Set SAI_SP M/S = 0 or 1 Set Serial Audio Interface Port to master mode or slave mode.

Set EXT ADC SCLK = 1 Identify external ADC clock source as CODEC Serial Port.

CX_SDOUT= ADC Data

SAI_SDOUT=S/PDIF Data DAC Mode

Not One-Line Mode One-Line Mode #1 One-Line Mode #2

ADC Mode

Not-One

Line Mode

CX_SCLK=64 Fs

CX_LRCK=SSM/DSM/QSM

SAI_SCLK=64 Fs

SAI_LRCK=CX_LRCK

CX_SCLK=128 Fs

CX_LRCK=SSM

SAI_SCLK=64 Fs

SAI_LRCK=CX_LRCK

not valid

One-Line

Mode #1

CX_SCLK=128 Fs

CX_LRCK=SSM

SAI_SCLK=64 Fs

SAI_LRCK=CX_LRCK

CX_SCLK=128 Fs

CX_LRCK=SSM

SAI_SCLK=64 Fs

SAI_LRCK=CX_LRCK

not valid

One-Line

Mode #2 not valid not valid not valid

SCLK_PORT1

LRCK_PORT1

SDIN_PORT1

SCLK_PORT2

LRCK_PORT2

SDIN_PORT2

SCLK_PORT3

LRCK_PORT3

SDOUT1_PORT3

SDOUT2_PORT3

SDOUT3_PORT3

SDOUT4_PORT3

RMCK

ADCIN1

ADCIN2

MCLK

SDOUT1

SDOUT2

LRCK

SCLK

64Fs

SPDIF Data

ADC Data

64Fs,128Fs

DIGITAL AUDIO

PROCESSOR

CS5361

SAI_SCLK

SAI_LRCK

SAI_SDOUT

CX_SCLK

CX_LRCK

CX_SDOUT

CX_SDIN1

CX_SDIN2

CX_SDIN3

CX_SDIN4

MCLK

Figure 18. OLM Configuratio n #3

CS42528

36 DS586F1

CS42528

4.6.4.4 OLM Config #4

This configuration will support up to 8 channels of DAC data 6 channels of ADC data and no channels of

S/PDIF received data. OLM Config #4 will handle up to 20-bit ADC samples at an Fs of 48 kHz and 24-bit

DAC samples at an Fs of 48 kHz. Since the ADC’s data stream is configured to use the SAI_SDOUT output

and the internal and external ADCs are clocked from the SAI_SP, the sample rate for the CODEC Serial

Port can be different from the sample rate of the Serial Aud io Interface serial port.

Functional Mode Register (addr = 03h)

Set CODEC_FMx = 00,01,10 CX_LRCK can run at SSM, DSM, or QSM independent of SAI_LRCK

Set SAI_FMx = 00,01,10 SAI_LRCK can run at SSM, DSM, or QSM independent of CX_LRCK

Set ADC_SP SELx = 10 Configure ADC data to use SAI_SDOUT and SAI_SP Clocks. S/PDIF data

is not supported in this configuration

Interface Format Register (addr = 04h)

Set DIFx bits to proper serial format Select the digital interface format when not in one line mode

Set ADC_OLx bits = 00,01 Select ADC operating mode, see table below for valid combinations

Set DAC_OLx bits = 00,01,10 Select DAC operating mode, see table below for valid combinations

Misc. Control Register (addr = 05h)

Set CODEC_SP M/S = 1 Set DAC Serial Port to master mode.

Set SAI_SP M/S = 0 or 1 Set ADC Serial Port to master mode or slave mode.

Set EXT ADC SCLK = 0 Identify external ADC clock source as SAI Serial Port.

CX_SDOUT= not used

SAI_SDOUT=ADC Data DAC Mode

Not One Line Mode One Line Mode #1 One Line Mode #2

ADC Mode

Not One-

Line Mode

CX_SCLK=64 Fs

CX_LRCK=SSM/DSM/QSM

SAI_SCLK=64 Fs

SAI_LRCK=SSM/DSM/QSM

CX_SCLK=128 Fs

CX_LRCK=SSM/DSM

SAI_SCLK=64 Fs

SAI_LRCK=SSM/DSM/QSM

CX_SCLK=256 Fs

CX_LRCK=SSM

SAI_SCLK=64 Fs

SAI_LRCK=SSM/DSM/QSM

One-Line

Mode #1

CX_SCLK=64 Fs

CX_LRCK=SSM/DSM/QSM

SAI_SCLK=128 Fs

SAI_LRCK=SSM

CX_SCLK=128 Fs

CX_LRCK=SSM/DSM

SAI_SCLK=128 Fs

SAI_LRCK=SSM

CX_SCLK=256 Fs

CX_LRCK=SSM

SAI_SCLK=128 Fs

SAI_LRCK=SSM

One-Line

Mode #2 not valid not valid not valid

SCLK_PORT1

LRCK_PORT1

SDIN_PORT1

SCLK_PORT2

LRCK_PORT2

SDIN_PORT2

SCLK_PORT3

LRCK_PORT3

SDOUT1_PORT3

SDOUT2_PORT3

SDOUT3_PORT3

SDOUT4_PORT3

RMCK

ADCIN1

ADCIN2

MCLK

SDOUT1

SDOUT2

LRCK

SCLK

64Fs,128Fs,256Fs

ADC Data

64Fs,128Fs

DIGITAL AUDIO

PROCESSOR

CS5361

SAI_SCLK

SAI_LRCK

SAI_SDOUT

CX_SCLK

CX_LRCK

CX_SDOUT

CX_SDIN1

CX_SDIN2

CX_SDIN3

CX_SDIN4

MCLK

Figure 19. OLM Configuration #4

CS42528

DS586F1 37

CS42528

4.6.4.5 OLM Config #5

This One-Line Mode config uration ca n su pport u p to 8 cha nnels of DAC data 2 cha nne ls of ADC data an d

2 channels of S/PDIF received data and will handle up to 24-bit samples at a sampling frequency of 48 kHz

on all channels for b oth the DAC and ADC. The output data stream of the internal ADCs can b e configured

to use the CX_SDOUT output and run at the CODEC_SP clock speeds or to use the SAI_SDOUT data

output and run at the SAI_SP rate. The CODEC_SP and SAI_SP c an opera te at di fferent Fs rates.

Functional Mode Register (addr = 03h)

Set CODEC_FMx = 00,01,10 CX_LRCK can run at SSM, DSM, or QSM independent of SAI_LRCK

Set SAI_FMx = 00,01,10 SAI_LRCK can run at SSM, DSM, or QSM independent of CX_LRCK

Set ADC_SP SELx = 00,01,10 Configure ADC data to use CX_SDOUT and CODEC_SP clocks, or

SAI_SDOUT and SAI_SP cocks.

Interface Format Register (addr = 04h)

Set DIFx bits to proper serial format Select the digital interface format when not in one line mode

Set ADC_OLx bits = 00 Set ADC operating mode to Not One Line Mode since only 2 channels of

ADC are supported

Set DAC_OLx bits = 00,01 Select DAC operating mode, see table below for valid combinations

Misc. Control Register (addr = 05h)

Set CODEC_SP M/S = 0 or 1 Set CODEC Serial Port to master mode or slave mode.

Set SAI_SP M/S = 0 or 1 Set Serial Audio Interface Port to master mode or slave mode.

Set EXT ADC SCLK = 0 External ADCs are not used. Leave bit in default state.

CX_SDOUT= ADC Data

SAI_SDOUT=ADC or

S/PDIF Data

DAC Mode

Not One-Line Mode One-Line Mode #1 One-Line Mode #2

ADC Mode

Not One-

Line Mode

CX_SCLK=64 Fs

CX_LRCK=SSM/DSM/QSM

SAI_SCLK=64 Fs

SAI_LRCK=SSM/DSM/QSM

CX_SCLK=128 Fs

CX_LRCK=SSM/DSM

SAI_SCLK=64 Fs

SAI_LRCK=SSM/DSM/QSM

not valid

One-Line

Mode #1 not valid not valid not valid

One-Line

Mode #2 not valid not valid not valid

SCLK_PORT1

LRCK_PORT1

SDIN_PORT1

SCLK_PORT2

LRCK_PORT2

SDIN_PORT2

SCLK_PORT3

LRCK_PORT3

SDOUT1_PORT3

SDOUT2_PORT3

SDOUT3_PORT3

SDOUT4_PORT3

RMCK

ADCIN1

ADCIN2

SPDIF or ADC Data

ADC Data

64Fs,128Fs, 256Fs

DIGITAL AUDIO

PROCESSOR

SAI_SCLK

SAI_LRCK

SAI_SDOUT

CX_SCLK

CX_LRCK

CX_SDOUT

CX_SDIN1

CX_SDIN2

CX_SDIN3

CX_SDIN4

64Fs,128Fs, 256Fs

MCLK

Figure 20. OLM Configuration #5

CS42528

38 DS586F1

CS42528

4.7 Control Port Description and Timing

The control port is used to access the registers, allowing th e CS42528 to be configured for the desired op-

erational modes and formats. The operation of the control port may be completely asynchronous with re-

spect to the audio sample rates. However, to avoid potential interference problems, the control port pins

should remain static if no operation is required.

The control port has two modes: SPI and I²C, with the CS42528 acting as a slave device. SPI mode is se-

lected if there is a high-to-low transition on the AD0/CS pin after the RST pin has been brought high. I²C

mode is selected by connecting the AD0/CS pin throug h a res istor to VL C or DGND, thereby permanently

selecting the desired AD0 bit address state.

4.7.1 SPI Mode

In SPI mode, CS is the CS42528 chip-select signal; CCLK is the control port bit clock (input into the

CS42528 from the microcontroller); CDIN is the input data line from the micr ocontroller, and CDOUT is

the output data line to the micro controller. Data is cloc ked in on th e rising ed ge of CCLK and out on the

falling edge.

Figure 21 shows the operation of the control port in SPI mode. To write to a r egister, bring CS low. The

first seven bits on CDIN form the chip address and must be 1001111. The eighth bit is a read/write indi-

cator (R/W), which should be low to write. The next eight bits form the Memory Address Pointer (MAP),

which is set to the address of the register that is to be upd ated. The next eight bits a re the data which will

be placed into the register designated by the MAP. During writes, the CDOUT output stays in the Hi-Z

state. It may be externally pulled high or low with a 47 kΩ resistor, if desired.

There is a MAP auto-increment capability, enabled by the INCR bit in the MAP register. If INCR is a zero,

the MAP will stay constant for successive read or writes. If INCR is set to a 1, the MAP will auto-increment

after each byte is read or written, allowing block r eads or writes of successive registers.

To read a register, the MAP has to be set to the correct addr ess by ex ec uting a pa rtial write c ycle wh ich

finishes (CS high) immediately after the MAP byte. The MAP auto increment bit (INCR) may be set or not,

as desired. To begin a read, bring CS low, send out the chip addres s and set the read/write bit (R/W) high.

The next falling edge of CCLK will clock out the MSB of the addressed register (CDOUT will leave the high

impedance state). If the MAP auto-increment bit is set to 1, the data for successive registers will appear

consecutively.

MAP

MSB LSB

DATA

byte 1 byte n

R/W R/W

ADDRESS

CHIP

ADDRESS

CHIP

CDIN

CCLK

CDOUT MSB LSB MSB LSB

1001111

MAP = Memory Address Pointer, 8 bits, MSB first

High Impedance

Figure 21. Control Port Timing in SPI Mode

DS586F1 39

CS42528

4.7.2 I²C Mode

In I²C mode, SDA is a bidirectional data line. Data is clocked into and out of the part by the clock, SCL.

There is no CS pin. Pins AD0 and AD1 form the two least-significant bits of the chip address and should

be connected through a resistor to VLC or DGND as desired. The state of the pins is sensed while the

CS42528 is being reset.

The signal timings for a read and write cycle are shown in Figure 22 and Figure 23. A Start condition is

defined as a falling transition of SDA while the clock is high. A Stop condition is a rising transition while

the clock is high. All other transitions of SDA occur while the clock is low. The first byte sent to the

CS42528 after a Start condition consists of a 7-bit chip address field and a R/W bit (high for a read, low

for a write). The upper 5 bits of the 7-bit address field are fixed at 10011. To communicate with a CS42528,

the chip address field, which is the first byte sent to the CS42528, should match 10011, followed by the

settings of the AD1 and AD0. The eighth bit of the address is the R/W bit. If the operation is a write, the

next byte is the Memory Address Pointer (MAP) which selects the register to be read or written. If the op-

eration is a read, the contents of the register pointed to by the MAP will be output. Setting the auto-incre-

ment bit in MAP allows successive reads or writes of consecutive registers. Each byte is separated by an

acknowledge bit. The ACK bit is output from the CS4 2528 after e ach input byte is read an d is input to the

CS42528 from the microcontroller after each transmitted byte.

Since the read operation cannot set the MAP, an aborted write operation is used as a preamble. As shown

in Figure 23, the write op eration is aborted after the ackno wledge for the MAP byte by sending a stop con-

dition. The following pseudocode illustrates an aborted write operation followed by a read operation.

Send start condition.

Send 10011xx0 (chip address & write operation).

Receive acknowledge bit.

Send MAP byte, auto increment off.

Receive acknowledge bit.

Send stop condition, aborting write.

4 5 6 7 24 25

SCL

CHIP ADDRESS (WRITE) MAP BYTE DATA DATA +1

START

ACK STOP

ACKACKACK

1 0 0 1 1 AD1 AD0 0

SDA INCR 6 5 4 3 2 1 0 7 6 1 0 7 6 1 0 7 6 1 0

0 1 2 3 8 9 12 16 17 18 1910 11 13 14 15 27 28

DATA +n

Figure 22. Control Port Timing, I²C Write

SCL

CHIP ADDRESS (WRITE) MAP BYTE DATA DATA +1

START ACK

STOP

ACK

1 0 0 1 1 AD1 AD0 0

SDA 1 0 0 1 1 AD1 AD0 1

CHIP ADDRESS (READ)

START

INCR 6 5 4 3 2 1 0 7 0 7 0 7 0

168 9 12 13 14 154 5 6 7 0 1 20 21 22 23 24 26 27 28

2 3 10 11 17 18 19 25

ACK

DATA + n

STOP

Figure 23. Control Port Timing, I²C Read

40 DS586F1

CS42528

Send start condition.

Send 10011xx1(chip addr ess & read operation).

Receive acknowledge bit.

Receive byte, contents of selected register.

Send acknowledge bit.

Send stop condition.

Setting the auto increment bit in the MAP allows successive reads or writes of consecutive registers. Each

byte is separated by an acknowledge bit.

4.8 Interrupts

The CS42528 has a comprehensive interrupt capability. The INT output pin is intended to dri ve the interrupt

input pin on the host microcontr oller. The INT pin may be set to be active low, active high or active low with

no active pull-up transistor. This last mode is used for active low, wired- OR hook-ups, with multiple periph-

erals connected to the microcontroller interrupt input pin.

Many conditions can cause an interrupt, as listed in the interr upt stat us register descrip tions (see “Interrupt

Status (address 20h) (Read Only)” on page 63). Each source may be masked off through mask register bits.

In addition, each source may be set to rising edge, falling edge, or level-sensitive. Combined with the option

of level-sensitive or ed ge-sensitive modes within the microco ntroller, many differ ent configurations ar e pos-

sible, depend ing on th e ne ed s of the eq u ipment designer .

4.9 Reset and Power-Up

Reliable power-up can be accomplished by keeping the device in reset until the power supplies, clocks and

configuration pins are stable. It is also recommende d that rese t be activated if the analog or digital supplies

drop below the recommended operating condition to prevent power-glitch-related issues.

When RST is low, the CS42528 enters a low-power mode and all internal states are reset, including the

control port and registers, and the outputs are muted. When RST is high, the control port becomes opera-

tional, and the desired settings should be loaded into the control register s. Writing a 0 to th e PDN bit in the

Power Control Register will then cause the part to leave the low-power state and begin operation. If the in-

ternal PLL is selected as the clock source, the serial audio outputs will be enabled after the PLL has settled

(see “Power Control (address 02h)” on page 47 for more details).

The delta-sigma modulators settle in a matter of microseconds after the analog section is powered, either

through the application of power or by setting the RST pin high. However, the voltage reference will take

much longer to reach a final value due to the presence of external capacitance on the FILT+ pin. A time

delay of approximately 80 ms is required after applying power to the device or after exiting a reset state.

During this voltage reference ramp delay, all serial ports and DAC outputs will be automatically muted.

DS586F1 41

CS42528

4.10 Power Supply, Grounding, and PCB Layout

As with any high-reso lution co nverte r, the CS42528 re quires ca refu l attention to power supply and gr ound-

ing arrangements if its potential performance is to be realized. Figure 5 shows the recomm ended power ar-

rangements, with VA and VARX connected to clean supplies. VD, which powers the dig ital circuitry, may be

run from the system logic supply. Alternatively, VD may be powered from the analog supply via a ferrite

bead. In this case, no additional devices should be powered from VD.

For applications where the output of the PLL is required to be low jitter, use a separate, low-noise analog

+5 V supply for VARX, decoupled to AGN D. In addition, a sepa rate region of an alog ground plan e around

the FILT+, VQ, LPFLT, REFGND, AGND, VA, VARX, RXP/and RXP0 pins is recommended.

Extensive use of power and ground planes, ground plane fill in unused areas and surface mount decoupling

capacitors are re commended. Deco upling capacitors should be as near to the pins of the CS42528 as pos-

sible. The low value ce ramic capacitor should be the ne arest to the pin and sh ould be mounted on the same

side of the board as the CS42528 to minimize inductance effects. All signals, especially clocks, should be

kept away from the FILT+, VQ and LPFL T pins in order to avoid unwanted coupling into the modulators and

PLL. The FILT+ and VQ deco uplin g capa citors , part icular ly the 0.1 µF, must be positioned to minimize the

electrical path from FILT+ and REFGND. The CDB42528 e va lua tio n boar d de mon strates th e op timum lay-

out and power supply arrangements.

42 DS586F1
CS42528
5. REGISTER QUICK REFERENCE
Addr Function 7 6 5 4 3 2 1 0
01h ID Chip_ID3 Chip_ID2 Chip_ID1 Chip_ID0 Rev_ID3 Rev_ID2 Rev_ID1 Rev_ID0
page 46
default 1111XXXX
02h Power Con-
trol PDN_RCVR1 PDN_RCVR0 PDN_ADC PDN_DAC4 PDN_DAC3 PDN_DAC2 PDN_DAC1 PDN
page 47
default 1 000000 1
03h Functional 
Mode CODEC_FM1 CODEC_FM0 SAI_FM1 SAI_FM0 ADC_SP 
SEL1 ADC_SP 
SEL0 DAC_DEM RCVR_DEM
page 46
default 0 000000 0
04h Interface 
Formats DIF1 DIF0 ADC_OL1 ADC_OL0 DAC_OL1 DAC_OL0 SAI_RJ16 CODEC_RJ16
page 50
default 0 100000 0
05h Misc Control Ext ADC 
SCLK HiZ_RMCK Reserved FREEZE FILTSEL HPF_
FREEZE CODEC_SP
M/S SAI_SP
M/S
page 51
default 0 000000 0
06h Clock Con-
trol RMCK_DIV1 RMCK_DIV0 OMCK 
Freq1 OMCK
Freq0 PLL_LRCK SW_CTRL1 SW_CTRL0 FRC_PLL_LK
page 53
default 0 000000 0
07h OMCK/PLL_
CLK Ratio RATIO7 RATIO6 RATIO5 RATIO4 RATIO3 RATIO2 RATIO1 RATIO0
page 54
default XXXXXXXX
08h RVCR Sta-
tus Digital Silence AES 
Format2 AES 
Format1 AES 
Format0 Active_CLK RVCR_CLK2 RVCR_CLK1 RVCR_CLK0
page 54
default XXXXXXXX
09h Burst Pre-
amble PC 
Byte 0
PC0-7 PC0-6 PC0-5 PC0-4 PC0-3 PC0-2 PC0-1 PC0-0
page 56
default XXXXXXXX
0Ah Burst Pre-
amble PC 
Byte 1
PC1-7 PC1-6 PC1-5 PC1-4 PC1-3 PC1-2 PC1-1 PC1-0
page 56
default XXXXXXXX
0Bh Burst Pre-
amble PD 
Byte 0
PD0-7 PD0-6 PD0-5 PD0-4 PD0-3 PD0-2 PD0-1 PD0-0
page 56
default XXXXXXXX
0Ch Burst Pre-
amble PD 
Byte 1
PD1-7 PD1-6 PD1-5 PD1-4 PD1-3 PD1-2 PD1-1 PD1-0
page 56
default XXXXXXXX
0Dh Volume 
Control Reserved SNGVOL SZC1 SZC0 AMUTE MUTE
SAI_SP RAMP_UP RAMP_DN
page 56
default 0 000100 0
0Eh Channel 
Mute B4_MUTE A4_MUTE B3_MUTE A3_MUTE B2_MUTE A2_MUTE B1_MUTE A1_MUTE
page 58
default 0 000000 0

DS586F1 43
CS42528
0Fh Vol. Control 
A1 A1_VOL7 A1_VOL6 A1_VOL5 A1_VOL4 A1_VOL3 A1_VOL2 A1_VOL1 A1_VOL0
page 58
default 0 0 00000 0
10h Vol. Control 
B1 B1_VOL7 B1_VOL6 B1_VOL5 B1_VOL4 B1_VOL3 B1_VOL2 B1_VOL1 B1_VOL0
page 58
default 0 0 00000 0
11h Vol. Control 
A2 A2_VOL7 A2_VOL6 A2_VOL5 A2_VOL4 A2_VOL3 A2_VOL2 A2_VOL1 A2_VOL0
page 58
default 0 0 00000 0
12h Vol. Control 
B2 B2_VOL7 B2_VOL6 B2_VOL5 B2_VOL4 B2_VOL3 B2_VOL2 B2_VOL1 B2_VOL0
page 58
default 0 0 00000 0
13h Vol. Control 
A3 A3_VOL7 A3_VOL6 A3_VOL5 A3_VOL4 A3_VOL3 A3_VOL2 A3_VOL1 A3_VOL0
page 58
default 0 0 00000 0
14h Vol. Control 
B3 B3_VOL7 B3_VOL6 B3_VOL5 B3_VOL4 B3_VOL3 B3_VOL2 B3_VOL1 B3_VOL0
page 58
default 0 0 00000 0
15h Vol. Control 
A4 A4_VOL7 A4_VOL6 A4_VOL5 A4_VOL4 A4_VOL3 A4_VOL2 A4_VOL1 A4_VOL0
page 58
default 0 0 00000 0
16h Vol. Control 
B4 B4_VOL7 B4_VOL6 B4_VOL5 B4_VOL4 B4_VOL3 B4_VOL2 B4_VOL1 B4_VOL0
page 58
default 0 0 00000 0
17h Channel 
Invert INV_B4 INV_A4 INV_B3 INV_A3 INV_B2 INV_A2 INV_B1 INV_A1
page 59
default 0 0 00000 0
18h Mixing Ctrl 
Pair 1 P1_A=B Reserved Reserved P1_ATAPI4 P1_ATAPI3 P1_ATAPI2 P1_ATAPI1 P1_ATAPI0
page 59
default 0 0 00100 1
19h Mixing Ctrl 
Pair 2 P2_A=B Reserved Reserved P2_ATAPI4 P2_ATAPI3 P2_ATAPI2 P2_ATAPI1 P2_ATAPI0
page 59
default 0 0 00100 1
1Ah Mixing Ctrl 
Pair 3 P3_A=B Reserved Reserved P3_ATAPI4 P3_ATAPI3 P3_ATAPI2 P3_ATAPI1 P3_ATAPI0
page 59
default 0 0 00100 1
1Bh Mixing Ctrl 
Pair 4 P4_A=B Reserved Reserved P4_ATAPI4 P4_ATAPI3 P4_ATAPI2 P4_ATAPI1 P4_ATAPI0
page 59
default 0 0 00100 1
1Ch ADC Left 
Ch. Gain Reserved Reserved LGAIN5 LGAIN4 LGAIN3 LGAIN2 LGAIN1 LGAIN0
page 61
default 0 0 00000 0
1Dh ADC Right 
Ch. Gain Reserved Reserved RGAIN5 RGAIN4 RGAIN3 RGAIN2 RGAIN1 RGAIN0
page 61
default 0 0 00000 0
Addr Function 7 6 5 4 3 2 1 0

44 DS586F1
CS42528
1Eh RCVR Mode 
Ctrl  SP_SYNC Reserved DE-EMPH1 DE-EMPH0 INT1 INT0 HOLD1 HOLD0
page 61
default 0 000000 0
1Fh RCVR Mode 
Ctrl 2 Reserved TMUX2 TMUX1 TMUX0 Reserved RMUX2 RMUX1 RMUX0
page 63
default 0 000000 0
20h Interrupt 
Status UNLOCK Reserved QCH DETC DETU Reserved OverFlow RERR
page 63
default XXXXXXXX
21h Interrupt 
Mask UNLOCKM Reserved QCHM DETCM DETUM Reserved OverFlowM RERRM
page 64
default 0 000000 0
22h Interrupt 
Mode MSB UNLOCK1 Reserved QCH1 DETC1 DETU1 Reserved OF1 RERR1
page 65
default 0 000000 0
23h Interrupt 
Mode LSB UNLOCK0 Reserved QCH0 DETC0 DETU0 Reserved OF0 RERR0
page 65
default 0 000000 0
24h Buffer Ctrl LOCKM1 LOCKM0 Reserved Reserved Reserved BSEL CAM CHS
page 65
default 0 100000 0
25h RCVR CS 
Data.  AUX3 AUX2 AUX1 AUX0 PRO AUDIO COPY ORIG
page 66. 
default 0 000000 0
26h RCVR 
Errors Reserved QCRC CCRC UNLOCK V CONF BIP PAR
page 67
default 0 000000 0
27h RCVR 
Errors Mask Reserved QCRCM CCRCM UNLOCKM VM CONFM BIPM PARM
page 68
default 0 000000 0
28h MUTEC Reserved Reserved MCPolarity M_AOUTA1 M_AOUTB1 M_AOUTA2
M_AOUTB2 M_AOUTA3
M_AOUTB3 M_AOUTA4
M_AOUTB4
page 69
default 0 001111 1
29h RXP7/GPO
7Mode1 Mode0 Polarity Function4 Function3 Function2 Function1 Function0
page 69
default 0 000000 0
2Ah RXP6/GPO
6Mode1 Mode0 Polarity Function4 Function3 Function2 Function1 Function0
page 69
default 0 000000 0
2Bh RXP5/GPO
5Mode1 Mode0 Polarity Function4 Function3 Function2 Function1 Function0
page 69
default 0 000000 0
2Ch RXP4/GPO
4Mode1 Mode0 Polarity Function4 Function3 Function2 Function1 Function0
page 69
default 0 000000 0
Addr Function 7 6 5 4 3 2 1 0

DS586F1 45
CS42528
2Dh RXP3/GPO
3Mode1 Mode0 Polarity Function4 Function3 Function2 Function1 Function0
page 69
default 0 0 00000 0
2Eh RXP2/GPO
2Mode1 Mode0 Polarity Function4 Function3 Function2 Function1 Function0
page 69
default 0 0 00000 0
2Fh RXP1/GPO
1Mode1 Mode0 Polarity Function4 Function3 Function2 Function1 Function0
page 69
default 0 0 00000 0
30h Q Subcode Address3 Address2 Address1 Address0 Control3 Control2 Control1 Control0
page 71
default XXXXXXXX
31h Q Subcode Track7 Track6 Track5 Track4 Track3 Track2 Track1 Track0
page 71
default XXXXXXXX
32h Q Subcode Index7 Index6 Index5 Index4 Index3 Index2 Index1 Index0
page 71
default XXXXXXXX
33h Q Subcode Minute7 Minute6 Minute5 Minute4 Minute3 Minute2 Minute1 Minute0
page 71
default XXXXXXXX
34h Q Subcode Second7 Second6 Second5 Second4 Second3 Second2 Second1 Second0
page 71
default XXXXXXXX
35h Q Subcode Frame7 Frame6 Frame5 Frame4 Frame3 Frame2 Frame1 Frame0
page 71
default XXXXXXXX
36h Q Subcode Zero7 Zero6 Zero5 Zero4 Zero3 Zero2 Zero1 Zero0
page 71
default XXXXXXXX
37h Q Subcode A.Minute7 A.Minute6 A.Minute5 A.Minute4 A.Minute3 A.Minute2 A.Minute1 A.Minute0
page 71
default XXXXXXXX
38h Q Subcode A.Second7 A.Second6 A.Second5 A.Second4 A.Second3 A.Second2 A.Second1 A.Second0
page 71
default XXXXXXXX
39h Q Subcode A.Frame7 A.Frame6 A.Frame5 A.Frame4 A.Frame3 A.Frame2 A.Frame1 A.Frame0
page 71
default XXXXXXXX
3Ah - C or U Data 
Buffer CU Buffer7 CU Buffer6 CU Buffer5 CU Buffer4 CU Buffer3 CU Buffer2 CU Buffer1 CU Buffer0
51h page 71
default XXXXXXXX
Addr Function 7 6 5 4 3 2 1 0

46 DS586F1

CS42528

6. REGISTER DESCRIPTION

All registers are rea d/write except for the I.D. and Revision Register, OMCK/PLL_CLK Ra tio Register, Interr upt Sta-

tus Register, and Q-Channel Subcode Bytes and C-bit or U-bit Data Buffer, which are read only. See the following

bit definition tables for bit assignment information. The default state of each bit after a power-up sequence or reset

is listed in each bit description.

6.1 M emory Address Pointer (MAP)

Not a registe r

6.1.1 INCREMENT (INCR)

Default = 1

Function:

Memory Address Pointer auto increment control

0 - MAP is not incremented automatically.

1 - Internal MAP is automatically incremented after each read or write.

6.1.2 MEMORY ADDRESS POINTER (MAPX)

Default = 0000001

Function:

Memory Address Pointer (MAP). Sets the register address that will be read or written by the control

port.

6.2 Chip I.D. and Revision Register (address 01h) (Read Only)

6.2.1 CHIP I.D. (CHIP_IDX)

Default = 1111

Function:

I.D. code for the CS42528. Permanently set to 1111.

6.2.2 CHIP REVISION (REV_IDX)

Default = xxxx

Function:

CS42528 revision level.

Revision D is coded as 0100.

Revision C is coded as 0011.

76543210

INCR MAP6 MAP5 MAP4 MAP3 MAP2 MAP1 MAP0

76543210

Chip_ID3 Chip_ID2 Chip_ID1 CHIP_ID0 Rev_ID3 Rev_ID2 Rev_ID1 Rev_ID0

DS586F1 47

CS42528

6.3 Power Control (address 02h)

6.3.1 POWER DOWN RECEIVER (PDN_RCVRX)

Default = 10

00 - Receiver and PLL in normal operation al mode.

01 - Receiver and PLL held in a reset state. Equivalent to setting 11.

10 - Reserved.

11 - Receiver and PLL held in a reset state. Equivalent to setting 01.

Function:

Places the S/PDIF receiver and PLL in a reset state. It is advised that any change of these bits be

made while the DACs are muted or the power-down bit (PDN) is enabled to eliminate the possibility

of audible artifacts.

It should be noted that, for Revision C compatibility, PDN_RCVR1 may be set to ‘0’ and receiver op-

eration may be controlled with the PDN_RCVR0 bit.

6.3.2 POWER DOWN ADC (PDN_ADC)

Default = 0

Function:

When enabled the stereo analog to digital converter will remain in a reset state. It is advised that any

change of this bit be made while the DACs are muted or the power-down bit (PDN) is enabled to elim-

inate the possibility of audible artifacts.

6.3.3 POWER DOWN DAC PAIRS (PDN_DACX)

Default = 0

Function:

When enabled the respective DAC channel pair x (AOUTAx and AOUTBx) will remain in a reset state.

6.3.4 POWER DOWN (PDN)

Default = 1

Function:

The entire device will enter a low-power state when this function is enabled, and the contents of the

control registers are retained in this mode. The power-down bit defaults to ‘enabled’ on power-up and

must be disabled befo re normal operation can occur.

76543210

PDN_RCVR1 PDN_RCVR0 PDN_ADC PDN_DAC4 PDN_DAC3 PDN_DAC2 PDN_DAC1 PDN

48 DS586F1

CS42528

6.4 Functional Mode (address 03h)

6.4.1 CODEC FUNCTIONAL MODE (CODEC_FMX)

Default = 00

00 - Single-Speed Mode (4 to 50 kHz sample rates)

01 - Double-Speed Mode (50 to 100 kHz sample rates)

10 - Quad-Speed Mode (100 to 192 kHz sample rates)

11 - Reserved

Function:

Selects the required range of sample rates for all converters clocked from the Codec serial port

(CODEC_SP). Bits must be set to the corresponding sample rate range when the CODEC_SP is in Master

or Slave Mode.

6.4.2 SERIAL AUDIO INTERFACE FUNCTIONAL MODE (SAI_FMX)

Default = 00

00 - Single-Speed Mode (4 to 50 kHz sample rates)

01 - Double-Speed Mode (50 to 100 kHz sample rates)

10 - Quad-Speed Mode (100 to 192 kHz sample rates)

11 - Reserved

Function:

Selects the required range of sample rates for the Serial Audio Interface port (SAI_SP). These bits

must be set to the corresponding sample rate range when the SAI_SP is in Master or Slave Mode.

6.4.3 ADC SERIAL PORT SELECT (ADC_SP SELX)

Default = 00

00 - Serial data on CX_SDOUT pin, clocked from the CODEC_SP. S/PDIF data on SAI_SDOUT pin.

01 - Serial data on CX_SDOUT pin, clocked from the SAI_SP. S/PDIF data on SAI_SDOUT pin.

10 - Serial data on SAI_SDOUT pin, clocked from the SAI_SP. No S/PDIF data available.

11 - Reserved

Function:

Selects the desired clocks and routing for th e ADC seri al ou tpu t.

6.4.4 DAC DE-EMPHASIS CONTROL (DAC_DEM)

Default = 0

Function:

Enables the digital filter to maintain the standard 15µs/50µs digital de-emphasis filter response at the

auto-detected sample rate of either 32, 44.1, or 48 kHz. De-emphasis will not be enabled, regardless

of this register setting, at any other sample rate. If the FRC_PLL_LK bit is set to a ‘1’b, the auto-detect

sample rate feature is disabl ed. To apply the correct de-emphasis filter, use the DE-EMPH bits in the

76543210

CODEC_FM1 CODEC_FM0 SAI_FM1 SAI_FM0 ADC_SP SEL1 ADC_SP SEL0 DAC_DEM RCVR_DEM

DS586F1 49

CS42528

Receiver Mode Control (address 1Eh) register to set the appropriate sample rate.

6.4.5 RECEIVER DE-EMPHASIS CONTROL (RCVR_DEM)

Default = 0

Function:

When enabled, de-emphasis will be automatically applied when emphasis is detected based on the

channel status bits. The appropriate digital filter will be selected to maintain the standard 15µs/50µs

digital de-emphasis filter response at the auto-detected sample rate of either 32, 44.1, or 48 kHz. If

the FRC_PLL_LK bit is set to a ‘1’b, then the auto-detect sample rate feature is disabled. To apply

the correct de-emphasis filter, use the DE-EMPH bits in the Receiver Mode Control (address 1Eh)

DAC_DEM

reg03h[1] FRC_PLL_LK

reg06h[0] DE-EMPH[1:0]

reg1Eh[5:4] De-Emphasis

Mode

0 X XX No De-Emphasis

1 0 XX Auto-Detect Fs

11 00

Reserved

32 kHz

44.1 kHz

48 kHz

Table 5. DAC De-Emphasis

RCVR_DEM

reg03h[0] FRC_PLL_LK

reg06h[0] DE-EMPH[1:0]

reg1Eh[5:4] De-Emphasis

Mode

0 X XX No De-Emphasis

1 0 XX Auto-Detect Fs

11 00

Reserved

32 kHz

44.1 kHz

48 kHz

Table 6. Receiver De-Emphasis

50 DS586F1
CS42528
6.5 Interface Formats (address 04h)
6.5.1 DIGITAL INTERFACE FORMAT (DIFX)
Default = 01
Function:
These bits select the digital interface format used for the CODEC Serial Port and Serial Audio Interface 
Port when not in One-Line Mode. The required relationship between the Left/Right clock,  serial clock, 
and serial data is defined by the Digital Interface Format and the options are detailed in 11-12. 
  
6.5.2 ADC ONE_LINE MODE (ADC_OLX)
Default = 00
Function:
These bits select which mode the ADC will use. By default, One-Line Mode is disabled, but it can be 
selected using these bits. Plea se see Figures 13 and 14 to see the format of One-Line Mode 1 and 
One-Line Mode 2. 
6.5.3 DAC ONE_LINE MODE (DAC_OLX)
Default = 00
Function:
These bits select which mode the DAC will use. By default, One-Line Mode is disabled, but it can be 
selected using these bits. Plea se see Figures 13 and 14 to see the format of One-Line Mode 1 and 
One-Line Mode 2.
76543210
DIF1 DIF0 ADC_OL1 ADC_OL0 DAC_OL1 DAC_OL0 SAI_RJ16 CODEC_RJ16
DIF1 DIF0 Description Format Figure
00
Left-Justified, up to 24-bit data 011
01
I²S, up to 24-bit data  110
10
Right-Justified, 16-bit or 24-bit data 212
11
Reserved --
Table 7. Digital Interface Formats
ADC_OL1 ADC_OL0 Description Format Figure
00
DIF: take the DIF setting from reg04h[7:6] --
01
One-Line #1 313
10
One-Line #2 414
11
Reserved --
Table 8. ADC One-Line Mode
DAC_OL1 DAC_OL0 Description Format Figure
00
DIF: take the DIF setting from reg04h[7:6] --
01
One-Line #1 313
10
One-Line #2 414
11
Reserved --
Table 9. DAC One-Line Mode

DS586F1 51

CS42528

6.5.4 SAI RIGHT-JUSTIFIED BITS (SAI_RJ1 6)

Default = 0

Function:

This bit determines how ma ny bits to use during right-justified mode for the Serial Audio Interface

Port. By default the receiver will be in RJ24 bits but can be set to RJ16 bits.

0 - 24 bit mode.

1 - 16 bit mode.

6.5.5 CODEC RIGHT-JUSTIFIED BITS (CODEC_RJ16)

Default = 0

Function:

This bit determines how many bits to use during Right-Justified Mode for the DAC and ADC within

the CODEC Serial Port. By default, the DAC and ADC will be in RJ24 bits, but can be set to RJ16 bits.

0 - 24 bit mode.

1 - 16 bit mode.

6.6 Misc Control (address 05h)

6.6.1 EXTERNAL ADC SCLK SELECT (EXT ADC SCLK)

Default = 0

Function:

This bit identifies the SCLK source for the external ADCs attached to the ADCIN1/2 ports when using

One-Line Mode of operation.

0 - SAI_SCLK is used as external ADC SCLK.

1 - CX_SCLK is used as external ADC SCLK.

6.6.2 RMCK HIGH IMPEDANCE (HIZ_RMCK)

Default = 0

Function:

This bit is used to create a high-impedance output on RMCK when the clock signal is not required.

76543210

Ext ADC SCLK HiZ_RMCK Rese rved FREEZE FILT_SEL HPF_FREEZE CODEC_SP

M/S SAI_SP

M/S

52 DS586F1

CS42528

6.6.3 FREEZE CONTROLS (FREEZE)

Default = 0

Function:

This function will freeze the previous output of, and allow modifications to be made to, the Volume

Control (address 0Fh-16h), Channel Invert (address 17h), and Mixing Control Pair (address 18h-1Bh)

registers without the changes taking effect u ntil the FREEZE is disabled. To make multiple changes

in these control port registers take effect simultaneously, enable the FREEZE bit, make all register

changes, then disable the FREEZE bit.

6.6.4 INTERPOLATION FILTER SELECT (FILT_SEL)

Default = 0

Function:

This feature allows the user to select whether the DAC interpolation filter has a fast- or slow roll-off.

For filter characteristics, please See “D/A Digital Filter Characteristics” on page 11.

0 - Fast roll-off.

1 - Slow roll-off.

6.6.5 HIGH-PASS FILTER FREEZE (HPF_FREEZE)

Default = 0

Function:

When this bit is set, the internal high-pass filter for the selected channel will be disabled. The current

DC offset value will be frozen and continue to be subtracted from the conversion result. See “A/D Dig-

ital Filter Characteristics” on page 9.

6.6.6 CODEC SERIAL PORT MASTER/SLAVE SELECT (CODEC_SP M/S)

Default = 0

Function:

In Master Mode, CX_SCLK and CX_LRCK are outputs. Internal dividers will divide the master clock

to generate the serial clock and left/right clo ck. In Slave Mode, CX_SCLK and CX_LRCK become in-

puts.

If the CX_SP is in Slave Mode, CX_LRCK must be present for proper device operation.

6.6.7 SERIAL AUDIO INTERFACE SERIAL PORT MASTER/SLAVE SELECT (SAI_SP M/S)

Default = 0

Function:

In Master Mode, SAI_SCLK and SAI_LRCK are outputs. Internal dividers will divide the master clock

to generate the serial clock and left/right clock. In Slave Mode, SAI_SCLK and SAI_LRCK become

inputs.

If the SAI_SP is in Slave Mode, SAI_LRCK must be present for proper device operation.

DS586F1 53

CS42528

6.7 Clock Control (address 06h)

6.7.1 RMCK DIVIDE (RMCK_DIVX)

Default = 00

Function:

Divides/multiplies the internal MCLK, either from the PLL or OMCK, by the selected factor.

6.7.2 OMCK FREQUENCY (OMCK FREQX)

Default = 00

Function:

Sets the appropriate frequency for the supplied OM CK.

6.7.3 PLL LOCK TO LRCK (PLL_LRCK)

Default = 0

0 - Disabled

1 - Enabled

Function:

When enabled, the internal PLL of the CS42528 will lock to the SAI_LRCK of the SAI serial port.

6.7.4 MASTER CLOCK SOURCE SELECT (SW_CTRLX)

Default = 00

Function:

These two bits, along with the UNLOCK bit in register “Interrupt Status (address 20h) (Read Only)”

on page 63, determine the master clock source for the CS42528. When SW_CTRL1 and SW_CTRL0

are set to '00'b, selecting the output of the PLL as the internal clock source, and the PLL becomes

unlocked, RMCK will equal OMCK, but all internal and serial port timings are not valid.

When the FRC_PLL_LK bit is set to ‘1’b, the SW_CTRLX bits must be set to ‘00’b. If the PLL becomes

76543210

RMCK_DIV1 RMCK_DIV0 OMCK Freq1 OMCK Freq0 PLL_LRCK SW_CTRL1 SW_CTRL0 FRC_PLL_LK

RMCK_DIV1 RMCK_DIV0 Description

Divide by 1

Divide by 2

Divide by 4

Multiply by 2

Table 10. RMCK Divider Settings

OMCK Freq1 OMCK Freq0 Description

0 0 11.2896 MHz or 12.2880 MHz

0 1 16.9344 MHz or 18.4320 MHz

1 0 22.5792 MHz or 24.5760 MHz

11Reserved

Table 11. OMCK Frequency Settings

54 DS586F1

CS42528

unlocked when the FRC_PLL_LK bit is set to ‘1’b, RMCK will not equal OMCK.

6.7.5 FORCE PLL LOCK (FRC_PLL_LK)

Default = 0

Function:

This bit is used to enable the PLL to lock to the S/PDIF input stream or the SAI_LRCK with the ab-

sence of a clock signal on OMCK. When set to a ‘1’b, the auto-detect sample frequency feature will

be disabled and the SW_CTRLX bits must be set to ‘00’b. The OMCK/PL L_CLK Ratio (address 07h )

(Read Only) register contents are not valid, and the PLL_CLK[2:0] bits will be set to ‘111’b. Use the

DE-EMPH[1:0] bits to properly apply de-emphasis filtering.

6.8 O MCK/PLL_CLK Ratio (address 07h) (Read Only)

6.8.1 OMCK/PLL_CLK RATIO (RATIOX)

Default = xxxxxxxx

Function:

This register allows the user to find the exact absolute frequency of the recovered MCLK coming from

the PLL. This value is represented as an integer (RATIO7:6) and a fractional (RATIO5:0) part. For

example, an OMCK/PLL_CLK ratio of 1.5 would be displayed as 60h.

6.9 RVCR Status (address 08h) (Read Only)

6.9.1 DIGITAL SILENCE DETECTION (DIGITAL SILENCE)

Default = x

0 - Digital Silence not detected

1 - Digital Silence detected

Function:

The CS42528 will auto-detect a digital silence condition when 1548 consecutive zeros have been de-

tected.

SW_CTRL1 SW_CTRL0 UNLOCK Description

0 0 X Manual setting, MCLK sourced from PLL.

0 1 X Manual setting, MCLK sourced from OMCK.

1Hold, keep same MCLK source.Auto switch, MCLK

sourced from OMCK.

1Auto switch, MCLK sourced from PLL.

Auto switch, MCLK sourced from OMCK.

Table 12. Master Clock Source Select

76543210

RATIO7(21)RATIO6(2

0)RATIO5(2

-1)RATIO4(2

-2)RATIO3(2

-3)RATIO2(2

-4)RATIO1(2

-5)RATIO0(2

-6)

76543210

Digital Silence AES Format2 AES Format1 AES Format0 Active_CLK RVCR_CLK2 RVCR_CLK1 RVCR_CLK0

DS586F1 55

CS42528

6.9.2 AES FORMAT DETECTION (AES FORMATX)

Default = xxx

Function:

The CS42528 will auto-detect the AES format of the incoming S/PDIF stream and display the infor-

mation according to the following table.

6.9.3 SYSTEM CLOCK SELECTION (ACTIVE_CLK)

Default = x

0 - Output of PLL

1 - OMCK

Function:

This bit identifies the sou rc e of the internal system clock (MCLK).

6.9.4 RECEIVER CLOCK FREQUENCY (RCVR_CLKX)

Default = xxx

Function:

The CS42528 detects the ratio between the OMCK and the recovered clock from the PLL. Given the

absolute frequency of OMCK, this ratio may be u sed to dete rmine the absolu te frequency of the PLL

clock.

If a 12.2880 MHz, 18.4320 MHz, or 24.5760 MHz clock is ap plied to OMCK and the OMCK_FREQX

bits are set accordingly (see “OMCK Frequency (OMCK Freqx) ” on page 53), the absolute frequency

of the PLL clock is reflected in the RCVR_CLKX bits accord ing to Table 14. If the absolute frequency

of the PLL clock does not ma tch one of the freque n cie s gi ven in Table 14, these bits will reflect the

closest available value.

If the frequency of OM CK is not equal to 12.2880 MHz, 18.4320 MHz, or 24.5760 MHz, the contents

of the RCVR_CLKX bits will be inaccurate and should be disregarded. In this case, an external con-

troller may use the con tents of the OMCK/PLL_CLK ratio register and the kno wn OMCK frequency to

determine the absolute frequency of the PLL clock.

Note: These bits are set to ‘111’b when the FRC_PLL_LK bit is ‘1’b.

AES

Format2 AES

Format1 AES

Format0 Description

000

Linear PCM

001

DTS®-CD

010

DTS®-LD

011

HDCD®

100

IEC 61937

101

Reserved

110

Reserved

111

Reserved

Table 13. AES Format Detection

56 DS586F1

CS42528

6.10 Burst Preamble PC and PD Bytes (addresses 09h - 0Ch)(Read Only)

6.10.1 BURST PREAMBLE BITS (PCX & PDX)

Default = xxh

Function:

The PC and PD burst preamble bytes are loaded into these four registers.

6.11 Volume Transition Control (address 0Dh)

6.11.1 SINGLE VOLUME CONTROL (SNGVOL)

Default = 0

Function:

The individual channel volume levels are independently controlled by their respective Volume Control

registers when this function is disabled . When enab led, th e volume on al l channels is dete rmined by

the A1 Channel Volume Control register and the other Volume Control registers are ignored.

6.11.2 SOFT RAMP AND ZERO CROSS CONTROL (SZCX)

Default = 00

00 - Immediate Change

01 - Zero Cross

10 - Soft Ramp

11 - Soft Ramp on Zero Crossings

Function:

Immediate Change

When Immediate Change is selected, all level changes will take effect immediately in one step.

Zero Cross

Zero Cross Enable dictates that signal-level changes, either by attenuation changes or muting, will

RCVR_CLK2 RCVR_CLK1 RCVR_CLK0 Description

0 0 0 8.1920 MHz

0 0 1 11.2896 MHz

0 1 0 12.288 MHz

0 1 1 16.3840 MHz

1 0 0 22.5792 MHz

1 0 1 24.5760 MHz

1 1 0 45.1584 MHz

1 1 1 49.1520 MHz

Table 14. Receiver Clock Frequency Detectio n

76543210

PCx-7 PCx-6 PCx-5 PCx-4 PCx-3 PCx-2 PCx-1 PCx-0

PDx-7 PDx-6 PDx-5 PDx-4 PDx-3 PDx-2 PDx-1 PDx-0

76543210

Reserved SNGVOL SZC1 SZC0 AMUTE MUTE SAI_SP RAMP_UP RAMP_DN

DS586F1 57

CS42528

occur on a signal zero crossing to minimize audible artifacts. The requested level-change will occur

after a timeout perio d between 512 and 1024 sample per iods (10.7 m s to 21 .3 ms a t 48 kHz sample

rate) if the signal does not encou nter a ze ro cro ssing. The zero cross fu nction is indep enden tly mon-

itored and implemented for each channel.

Soft Ramp

Soft Ramp allows level changes, both muting and attenuation, to be implemented by incrementally

ramping, in 1/8 dB steps, from the current level to the new level at a rate of 1 dB per 8 left/right clock

periods.

Soft Ramp on Zero Crossing

Soft Ramp and Zero Cross Enable dictates that sig nal level cha ng es, either b y atte nua tion ch ang es

or muting, will occur in 1/8 dB steps and be implemented on a signal zero crossing. The 1/8 dB level

change will occur after a timeout period between 512 and 1024 sample periods (10.7 ms to 21.3 ms

at 48 kHz sample rate) if the signal does not encounter a zero crossing. The zero cross function is

independently monitored and implemented for each channel.

6.11.3 AUTO-MUTE (AMUTE)

Default = 1

0 - Disabled

1 - Enabled

Function:

The digital-to-analog converters of the CS42528 will mute the output following the reception of 8192

consecutive audio samples of static 0 or -1. A single sample of non-static data will release the mute.

Detection and muting is done independently for each channel. The quiescent voltage on the output

will be retained, and the MUTEC pin will go active during the mute period. The muting function is af-

fected, similar to volume control changes, by the Soft and Zero Cross bits (SZC[1:0]).

6.11.4 SERIAL AUDIO INTERFACE SERIAL PORT MUTE (MUTE SAI_SP)

Default = 0

0 - Disabled

1 - Enabled

Function:

When enabled, the Serial Audio Interface port (SAI_SP) will be muted.

6.11.5 SOFT VOLUME RAMP-UP AFTER ERROR (RMP_UP)

Default = 0

0 - Disabled

1 - Enabled

Function:

An un-mute will be performed after executing a filter mode change, after a MCLK/LRCK ratio change

or error, a nd after changing the Functional M ode. When this feature is enabled , this un-mute is affect-

ed, similar to attenuation changes, by the Soft and Zero Cross bits (SZC[1:0]). When disabled, an

immediate un-mute is performed in these instances.

Note: For best results, it is recommended that this bit be used in conjunction with the RMP_DN bit.

58 DS586F1

CS42528

6.11.6 SOFT RAMP-DOWN BEFORE FILTER MODE CHANGE (RMP_DN)

Default = 0

0 - Disabled

1 - Enabled

Function:

A mute will be performed prior to executing a filter mode or de-emphasis mode change. When this

feature is enabled, this mute is affected, similar to attenuation changes, by the Soft and Zero Cross

bits (SZC[1:0]). When disabled, an immediate mute is performed prior to executing a filter mode or

de-emphasis mode change.

Note: For best results, it is recommended that this bit be used in conjunction with the RMP_UP bit.

6.12 Channel Mute (address 0Eh)

6.12.1 INDEPENDENT CHANNEL MUTE (XX_MUTE)

Default = 0

0 - Disabled

1 - Enabled

Function:

The digital-to-analog converter outputs of the CS42528 will mute when enabled. The quiescent volt-

age on the outputs will be retained. The muting function is affected, similar to attenuation changes,

by the Soft and Zero Cross bits (SZC[1:0]).

6.13 Volume Control (addresses 0Fh, 10h, 11h, 12h, 13h, 14h, 15h, 16h)

6.13.1 VOLUME CONTROL (XX_VOL)

Default = 0

Function:

The Digital Volume Control registers allow independent control of the signal levels in 0.5 dB incre-

ments from 0 to -127 dB. Volume settings are decoded as shown in Table 15. The volume changes

are implemented as dictated by the Soft and Zero Cross bits (SZC[1:0]). All volume settings less than

-127 dB are equivalent to enabling the MUTE bit for the given channel.

76543210

B4_MUTE A4_MUTE B3_MUTE A3_MUTE B2_MUTE A2_MUTE B1_MUTE A1_MUTE

76543210

xx_VOL7 xx_VOL6 xx_VOL5 xx_VOL4 xx_VOL3 xx_VOL2 xx_VOL1 xx_VOL0

Binary Code Decimal Value Volume Setting

00000000 0 0 dB

00101000 40 -20 dB

01010000 80 -40 dB

01111000 120 -60 dB

10110100 180 -90 dB

Table 15. Example Digit al Volume Settings

DS586F1 59

CS42528

6.14 Channel Invert (address 17h)

6.14.1 INVERT SIGNAL POLARITY (INV_XX)

Default = 0

0 - Disabled

1 - Enabled

Function:

When enabled, these bits will invert the signal polarity of their respective channels.

6.15 Mixing Control Pair 1 (Channels A1 & B1)(address 18h)

Mixing Control Pair 2 (Channels A2 & B2)(address 19h)

Mixing Control Pair 3 (Channels A3 & B3)(address 1Ah)

Mixing Control Pair 4 (Channels A4 & B4)(address 1Bh)

6.15.1 CHANNEL A VOLUME = CHANNEL B VOLUME (PX_A=B)

Default = 0

0 - Disabled

1 - Enabled

Function:

The AOUTAx and AOUTBx volume levels are independently controlled by the A and the B Channel

Volume Control registe rs when this function is disa bled. The vol ume on both AOUTAx and AOUTBx

are determined by the A Channel Volume Control registers (per A-B pair), and the B Channel Volume

Control registers are ignored when this function is enabled.

76543210

INV_B4 INV_A4 INV_B3 INV_A3 INV_B2 INV_A2 INV_B1 INV_A1

76543210

Px_A=B Reserved Reserved Px_ATAPI4 Px_ATAPI3 Px_ATAPI2 Px_ATAPI1 Px_ATAPI0

60 DS586F1

CS42528

6.15.2 ATAPI CHANNEL-MIXING AND MUTING (PX_ATAPIX)

Default = 01001

Function:

The CS42528 implements the channel-mixing functions of the ATAPI CD-ROM specification. The

ATAPI functions are applied per A-B pair. Refer to Table 16 and Figure 8 for additional information.

ATAPI4 ATAPI3 ATAPI2 ATAPI1 ATAPI0 AOUTAx AOUTBx

00000 MUTE MUTE

00001 MUTE bR

00010 MUTE bL

00011 MUTE b[(L+R)/2]

00100 aR MUTE

00101 aR bR

00110 aR bL

00111 aR b[(L+R)/2]

01000 aL MUTE

01001 aL bR

01010 aL bL

01011 aL b[(L+R)/2]

01100 a[(L+R)/2] MUTE

0 1 1 0 1 a[(L+R)/2] bR

0 1 1 1 0 a[(L+R)/2] bL

0 1 1 1 1 a[(L+R)/2] b[(L+R)/2]

10000 MUTE MUTE

10001 MUTE bR

10010 MUTE bL

10011 MUTE [(aL+bR)/2]

10100 aR MUTE

10101 aR bR

10110 aR bL

10111 aR [(bL+aR)/2]

11000 aL MUTE

11001 aL bR

11010 aL bL

11011 aL [(aL+bR)/2]

1 1 1 0 0 [(aL+bR)/2] MUTE

1 1 1 0 1 [(aL+bR)/2] bR

1 1 1 1 0 [(bL+aR)/2] bL

1 1 1 1 1 [(aL+bR)/2] [(aL+bR)/2]

Table 16. ATAPI Decode

DS586F1 61

CS42528

6.16 ADC Left Channel Gain (address 1Ch)

6.16.1 ADC LEFT CHANNEL GAIN (LGAINX)

Default = 00h

Function:

The level of the left analog channel can be adjusted in 1 dB increments as dictated by the Soft and

Zero Cross bits (SZC[1:0]) from +15 to -15 dB. Levels are decoded in two’s complement, as shown

in Table 17.

6.17 ADC Right Channel Gain (address 1Dh)

6.17.1 ADC RIGHT CHANNEL GAIN (RGAINX)

Default = 00h

Function:

The level of the right analog chann el can be adjusted in 1 dB incre ments as dictated by th e Soft and

Zero Cross bits (SZC[1:0]) from +15 to -15 dB. Levels are decoded in two’s complement, as shown

in Table 17.

6.18 Receiver Mode Control (address 1Eh)

6.18.1 SERIAL PORT SYNCHRONIZATION (SP_SYNC)

Default = 0

0 - CX & SAI Serial Port timings not in phase

1 - CX & SAI Serial Port timings are in phase

Function:

Forces the LRCK and SCLK from the CX & SAI Serial Ports to align and operate in phase. This func-

tion will operate when both ports are running at the same sample rate or when operating at different

sample rates.

76543210

Reserved Reserved LGAIN5 LGAIN4 LGAIN3 LGAIN2 LGAIN1 LGAIN0

76543210

Reserved Reserved RGAIN5 RGAIN4 RGAIN3 RGAIN2 RGAIN1 RGAIN0

Binary Code Decimal Value Volume Setting

001111 +15 +15 dB

001010 +10 +10 dB

000101 +5 +5 dB

000000 0 0 dB

111011 -5 -5 dB

110110 -10 -10 dB

110001 -15 -15 dB

Table 17. Example ADC Input Gain Settings

76543210

SP_SYNC Reserved DE-EMPH1 DE-EMPH0 INT1 INT0 HOLD1 HOLD0

62 DS586F1

CS42528

6.18.2 DE-EMPHASIS SELECT BITS (DE-EMPHX)

Default = 00

00 - Reserved

01 - De-Emphasis for 32 kHz sample rate.

10 - De-Emphasis for 44.1 kHz sample rate.

11 - De-Emphasis for 48 kHz sample rate.

Function:

Used to specify which de-em phasis filter to apply when the “Force PLL Lock (FRC_PLL_LK)” on

page 54 is enabled.

6.18.3 INTERRUPT PIN CONTROL (INTX)

Default = 00

00 - Active high; high output indicates interrupt condition has occurred

01 - Active low; low output indicates an interrupt condition has occurred

10 - Open drain, active low. Requires an external pull-up resistor on the INT pin.

11 - Reserved

Function:

Determines how the inte rrupt pin (INT) will indicate an interrupt condition.

6.18.4 AUDIO SAMPLE HOLD (HOLDX)

Default = 00

00 - Hold the last valid audio sample

01 - Replace the current audio sample with 00 (mute)

10 - Do not change the received audio sample

11 - Reserved

Function:

Determines how received audio samples are affected when a receiver error occurs.

DS586F1 63

CS42528

6.19 Receiver Mode Control 2 (address 1Fh)

6.19.1 TXP MULTIPLEXER (TMUXX)

Default = 000

Function:

Selects which of the eight receiver inputs will be mapped directly to the TXP output pin.

6.19.2 RECEIVER MULTIPLEXER (RMUXX)

Default = 000

Function:

Selects which of the eight receiver inputs will be mapped to the internal receiver.

6.20 Interrupt Status (address 20h) (Read Only)

For all bits in this registe r, a “1 ” me a ns th e as soc i at ed interrupt condition has occurred at least once since the reg -

ister was last read. A ”0” means the associated interrupt condition has NOT occurred since the last reading of the

register. Reading the register resets all bits to 0. Status bits that are masked off in the associated mask register will

always be “0” in this register.

76543210

Reserved TMUX2 TMUX1 TMUX0 Reserved RMUX2 RMUX1 RMUX0

TMUX2 TMUX1 TMUX0 Description

000

Output from pin RXP0

001

Output from pin RXP1

010

Output from pin RXP2

011

Output from pin RXP3

100

Output from pin RXP4

101

Output from pin RXP5

110

Output from pin RXP6

111

Output from pin RXP7

Table 18. TXP Output Selection

RMUX2 RMUX1 RMUX0 Description

000

Input from pin RXP0

001

Input from pin RXP1

010

Input from pin RXP2

011

Input from pin RXP3

100

Input from pin RXP4

101

Input from pin RXP5

110

Input from pin RXP6

111

Input from pin RXP7

Table 19. Receiver Input Selection

76543210

UNLOCK Reserved QCH DETC DETU Reserved OverFlow RERR

64 DS586F1

CS42528

6.20.1 PLL UNLOCK (UNLOCK)

Default = 0

Function:

PLL unlock status bit. This bit will go high if the PLL becomes unlocked.

6.20.2 NEW Q-SUBCODE BLOCK (QCH)

Default = 0

Function:

Indicates when the Q-Subcode block has changed.

6.20.3 D TO E C-BUFFER TRANSFER (DETC)

Default = 0

Function:

Indicates when the channel status buffer has changed.

6.20.4 D TO E U-BUFFER TRANSFER (DETU)

Default = 0

Function:

Indicates when the user status buffer has changed.

6.20.5 ADC OVERFLOW (OVERFLOW)

Default = 0

Function:

Indicates that there is an over-range condition anywhere in the CS42528 ADC signal path.

6.20.6 RECEIVER ERROR (RERR )

Default = 0

Function:

Indicates that a receiver error has occurred. The register “Receiver Errors (address 26h) (Read Only)”

on page 67 may be read to determine the nature of the error which caused the interrupt.

6.21 Interrupt Mask (address 21h)

Default = 00000000

Function:

The bits of this register serve as a mask for the interrupt sources found in the register “Interrupt Status

(address 20h) (Read Only)” on page 63. If a mask bit is set to 1, the error is unmasked, meaning that

its occurrence will affect the INT pin and the status register. If a mask bit is set to 0, the error is

masked, meaning that its occurrence will not affect the INT pin or the status register. The bit positions

align with the corresponding bits in the Interrupt Status register.

76543210

UNLOCKM Reserved QCHM DETCM DETUM Reserved OverFlowM RERRM

DS586F1 65

CS42528

6.22 Interrupt Mode MSB (address 22h)

Interrupt Mode LSB (address 23h)

Default = 00000000

Function:

The two Interrupt Mode registers form a 2-bit code for each Interrupt Status register function. There

are three ways to set the INT pin active in accordance with the interrupt condition. In the Rising edge

active mode, the INT pin becomes active on the arrival of the interrupt condition. In the Falling edge

active mode, the INT pin becomes active on the removal of the interrupt condition. In Level active

mode, the INT interrupt pin becomes active during the interrupt condition. Be aware that the ac tive

level (Active High or Low) only depends on the INT(1:0) bits located in the register “Receiver Mode

Control (address 1Eh) ” on page 61.

00 - Rising edge active

01 - Falling edge active

10 - Level active

11 - Reserved

6.23 Channel Status Data Buffer Control (address 24h)

6.23.1 S/PDIF RECEIVER LOCKING MODE (LOCKMX)

Default = 01

00 - Revision C compatibility mode.

01 - Revision D default mode. Provides improved wideband jitter rejection in Double- and Quad-

Speed modes.

10 - High update rate phase detector mode. Provides improved in-band jitter, but increased wideband

jitter. Use this setting for best ADC and DAC performance with clocked from the PLL recovered

clock.

11 - Reserved.

Function:

Selects the mode used by the S/PDIF receiver to lock to the active RXP[7:0] input. Revision C com-

patibility mode is included for backward compatibility with Revision C.

6.23.2 DATA BUFFER SELECT (BSEL)

Default = 0

0 - Data buffer add re ss sp ac e contains Channel Status data

1 - Data buffer address space contains User data

Function:

Selects the data buffer register addresses to contain either User data or Channel Status data.

76543210

UNLOCK1 Reserved QCH1 DETC1 DETU1 Reserved OF1 RERR1

UNLOCK0 Reserved QCH0 DETC0 DETU0 Reserved OF0 RERR0

76543210

LOCKM1 LOCKM0 Reserved Reserved Reserved BSEL CAM CHS

66 DS586F1

CS42528

6.23.3 C-DATA BUFFER CONTROL (CAM)

Default = 0

0 - One byte mode

1 - Two byte mode

Function:

Sets the C-data buffer control port access mode.

6.23.4 CHANNEL SELECT (CHS)

Default = 0

Function:

When set to ‘0’, channel A information is displayed in the receiver channel status register. Channel A

information is output during control port reads when CAM is set to ‘0’ (one byte mode).

When set to ‘1’, channel B information is displayed in the receiver channel status register. Channel B

information is output during control port reads when CAM is set to ‘0’ (one byte mode).

6.24 Receiver Channel Status (address 25h) (Read Only)

The bits in this register can be associated with either channel A or B of the received data. The desired channel is

selected with the CHS bit of the Channel Status Data Buffer Control register.

6.24.1 AUXILIARY DATA WIDTH (AUXX)

Default = xxxx

Function:

Displays the incoming auxiliary data field width, as indicated by the incoming channel status bits, de-

coded according to IEC60958.

6.24.2 CHANNEL STATUS BLOCK FORMAT (PRO)

Default = x

Function:

Indicates the channel status block format.

76543210

AUX3 AUX2 AUX1 AUX0 PRO AUDIO COPY ORIG

AUX3 AUX2 AUX1 AUX0 Description

0 0 0 0 Auxiliary data is not present

0 0 0 1 Auxiliary data is 1 bit long

0 0 1 0 Auxiliary data is 2 bit long

0 0 1 1 Auxiliary data is 3 bit long

0 1 0 0 Auxiliary data is 4 bit long

0 1 0 1 Auxiliary data is 5 bit long

0 1 1 0 Auxiliary data is 6 bit long

0 1 1 1 Auxiliary data is 7 bit long

1 0 0 0 Auxiliary data is 8 bit long

1 0 0 1 1001 - 1111 is Reserved

Table 20. Au xiliary Data Width Selection

DS586F1 67

CS42528

6.24.3 AUDIO IND ICATO R (AUDIO)

Default = x

Function:

A ‘0’ indicates that the received data is linearly coded PCM audio. A ‘1’ indicates that the received

data is not linearly coded PCM audio.

6.24.4 SCMS COPYRIGHT (COPY)

Default = x

Function:

A ‘0’ indicates that copyright is not asserted, while a ‘1’ indicates that copyright is asserted. If the cat-

egory code is set to General in the incoming S/PDIF digital stream, copyright will always be indicated

by COPY, even when the stream indicates no copyright.

6.24.5 SCMS GENERATION (ORIG)

Default = x

Function:

A ‘0’ indicates that the received data is 1st generation or higher. A ‘1’ indicates that the received data

is original. COPY and ORIG will both be set to ‘1’ if the incoming data is flagged as professional, or if

the receiver is not in us e.

6.25 Receiver Errors (address 26h) (Read Only)

6.25.1 CRC ERROR (QCRC)

Default = x

0 - No error

1 - Error

Function:

Indicates a Q-subcode data CRC error. This bit is updated on Q-subcode block boundaries.

6.25.2 REDUNDANCY CHECK (CCRC)

Default = x

0 - No error

1 - Error

Function:

Indicates a channel status block cyclic redundancy. This bit is updated on CS block bo undaries, valid

in Professional mode.

76543210

Reserved QCRC CCRC UNLOCK V CONF BIP PAR

68 DS586F1

CS42528

6.25.3 PLL LOCK STATUS (UNLOCK)

Default = x

0 - PLL locked

1 - PLL out of lock

Function:

Indicates the lock status of the PLL.

6.25.4 RECEIVED VALIDITY (V)

Default = x

0 - Data is valid and is normally linear coded PCM audio

1 - Data is invalid, or may be valid compressed audio

Function:

Indicates the received validity status. This bit is updated on sub-frame boundaries.

6.25.5 RECEIVED CONFIDENCE (CONF)

Default = x

0 - No error

1 - Confidence error. The logical OR of UNLOCK and BIP. The input data stream may be near an error

condition due to jitter.

Function:

Indicates the received confidence status. This bit is updated on sub-frame boundaries.

6.25.6 BI-PHASE ERROR (BIP)

Default = x

0 - No error

1 - Bi-phase error. This indicates an error in the received bi-phase coding.

Function:

Indicates a bi-phase coding error. This bit is updated on sub-frame boundaries.

6.25.7 PARITY STATUS (PAR)

Default = x

0 - No error

1 - Parity Error

Function:

Indicates the Parity status. This bit is updated on sub-frame boundaries.

6.26 Receiver Errors Mask (address 27h)

Default = 00000000

Function:

The bits in this register serve as masks for the corresponding bits of the Receiver Errors register. If a

mask bit is set to 1, the error is unmasked, meaning that its occurrence will appear in the receiver

errors register, will affect the RERR interrupt, and will affect the current audio sample according to

76543210

Reserved QCRCM CCRCM UNLOCKM VM CONFM BIPM PARM

DS586F1 69

CS42528

the status of the HOLD bit. If a mask bit is set to 0, the erro r is ma sked, mea ning that its occurren ce

will not appear in the receiver error register, will not affect the RERR interrupt, and will not affect the

current audio sample. The CCRC and QCRC b its behave differently from the other bits: they do not

affect the current audio sample even when unmasked.

6.27 Mutec Pin Control (address 28h)

6.27.1 MUTEC POLARITY SELECT (MCPOLARITY)

Default = 0

0 - Active low

1 - Active high

Function:

Determines the polarity of the MUTEC pin.

6.27.2 CHANNEL MUTES SELECT (M_AOUTXX)

Default = 11111

0 - Channel mute is not mapped to the MUTEC pin

1 - Channel mute is mapped to the MUTEC pin

Function:

Determines which channel mutes will be mapped to the MUTEC pin. If no channel mute bits are

mapped, then the MUTEC pin is driven to the “active” state as defined by the POLARITY bit. These

Channel Mute Select bits are “ANDed” together in order for the MUTEC pin to go active. This means

that if multiple Channel Mutes are selected to be mapped to the M UTEC pin, all correspond ing chan-

nels must be muted before the MUTEC will go active.

6.28 RXP/General-Purpose Pin Control (addresses 29h to 2Fh)

6.28.1 MO DE CONTROL (MODEX)

Default = 00

00 - RXP Input

01 - Mute Mode

10 - GPO/Overflow Mode

11 - GPO, Drive High Mode

Function:

RXP Input - The pin is configured as a receiver in put which can then be muxed to either the TXP p in

or to the internal receiver.

Mute Mode - The pin is configured as a dedicated mute pi n. The mu ting function is controlled by the

Function bits.

GPO, Drive Low / ADC Overflow Mode - The pin is configured as a general-purpose output driven low

76543210

Reserved Reserved MCPolarity M_AOUTA1 M_AOUTB1 M_AOUTA2

M_AOUTB2 M_AOUTA3

M_AOUTB3 M_AOUTA4

M_AOUTB4

76543210

Mode1 Mode0 Polarity Function4 Function3 Function2 Function1 Function0

70 DS586F1

CS42528

or as a dedicated ADC overflow pin indicating an over-range condition anywhere in the ADC signal

path for either the left or right channel. The Functionx bits determine the operation of the pin. When

configured as a GPO with the output driven low, the driver is a CMOS driver. When configured to iden-

tify an ADC Overflow condition, the driver is an open drain driver requiring a pull-up resistor.

GPO, Drive High Mode - The pin is configured as a general purpose output driven high.

6.28.2 POLARITY SELECT (POLARITY)

Default = 0

Function:

RXP Input - If the pin is configured for an RXP input, the polarity bit is ignored. It is recommended that

in this mode this bit be set to 0.

Mute Mode - If the pin is configured as a dedicated mute output pin, the polarity bit determines the

polarity of the mapped pin according to the following

0 - Active low

1 - Active high

GPO, Drive Low / ADC Overflow Mode - If the pin is configured as a GPO, Drive Low / ADC Overflow

Mode pin, the polarity bit is ignored. It is recommended that in this mode this bit be set to 0.

GPO, Drive High - If the pin is configured as a general-purpose output driven high, the polarity bit is

ignored. It is recommended that in this mode this bit be set to 0.

6.28.3 FUNCTIONAL CONTROL (FUNCTIONX)

Default = 00000

Function:

RXP Input - If the pin is configured for an RXP input, the functional bits are ignored. It is recommended

that in this mode all the functional bits be set to 0.

Mute Mode - If the pin is configured as a dedicated mute pin, the functional bits determine which chan-

nel mutes will be mapped to this pin according to the following table.

0 - Channel mute is not mapped to the RXPx/GPOx pin

1 - Channel mute is mapped to the RXPx/GPOx pin:

GPO, Drive Low / ADC Overflow Mode - If the pin is configured as a GPO, Drive Low / ADC Overflow

Mode pin, the Function1 and Function0 bits determine how the output will behave according to the

RXPx/GPOx Reg Address Function4 Function3 Function2 Function1 Function0

RXP7/GPO7

pin 42 29h M_AOUTA1 M_AOUTB1 M_AOUTA2

M_AOUTB2 M_AOUTA3

M_AOUTB3 M_AOUTA4

M_AOUTB4

RXP6/GPO6

pin 43 2Ah M_AOUTA1

M_AOUTB1 M_AOUTA2 M_AOUTB2 M_AOUTA3

M_AOUTB3 M_AOUTA4

M_AOUTB4

RXP5/GPO5

pin 44 2Bh M_AOUTA1

M_AOUTB1 M_AOUTA2 M_AOUTB2 M_AOUTA3

M_AOUTB3 M_AOUTA4

M_AOUTB4

RXP4/GPO4

pin 45 2Ch M_AOUTA1

M_AOUTB1 M_AOUTA2

M_AOUTB2 M_AOUTA3 M_AOUTB3 M_AOUTA4

M_AOUTB4

RXP3/GPO3

pin 46 2Dh M_AOUTA1

M_AOUTB1 M_AOUTA2

M_AOUTB2 M_AOUTA3 M_AOUTB3 M_AOUTA4

M_AOUTB4

RXP2/GPO2

pin 47 2Eh M_AOUTA1

M_AOUTB1 M_AOUTA2

M_AOUTB2 M_AOUTA3

M_AOUTB3 M_AOUTA4 M_AOUTB4

RXP1/GPO1

pin 48 2Fh M_AOUTA1

M_AOUTB1 M_AOUTA2

M_AOUTB2 M_AOUTA3

M_AOUTB3 M_AOUTA4 M_AOUTB4

DS586F1 71

CS42528

following table. It is recommended that in this mode the remaining functional bits be set to 0.

GPO, Drive High - If the pin is con figured as a general-pur pose output, the functional bits are ignored

and the pin is driven high. It is recommended that in this mode all the functional bits be set to 0.

6.29 Q-Channel Subcode Bytes 0 to 9 (addresses 30h to 39h) (Read Only)

These ten registers contain the decoded Q-ch annel subcode data.

6.30 C-Bit or U-Bit Data Buffer (addresses 3Ah to 51h) (Read Only)

Either channel status data buffer E or user data buffer E is accessible through these register addresses.

Function1 Function0 GPOx Driver Type

0 0 Drive Low CMOS

1 1 OVFL R or L Open Drain

76543210

Address3 Address2 Address1 Address0 Control3 Control2 Control1 Control0

Track7 Track6 Track5 Track4 Track3 Track2 Track1 Track0

Index7 Index6 Index5 Index4 Index3 Index2 Index1 Index0

Minute7 Minute6 Minute5 Minute4 Minute3 Minute2 Minute1 Minute0

Second7 Second6 Second5 Second4 Second3 Second2 Second1 Second0

Frame7 Frame6 Frame5 Frame4 Frame3 Frame2 Frame1 Frame0

Zero7 Zero6 Zero5 Zero4 Zero3 Zero2 Zero1 Zero0

A.Minute7 A.Minute6 A.Minute5 A.Minute4 A.Minute3 A.Minute2 A.Minute1 A.Minute0

A.Second7 A.Second6 A.Second5 A.Second4 A.Second3 A.Second2 A.Second1 A.Second0

A.Frame7 A.Frame6 A.Frame5 A.Frame4 A.Frame3 A.Frame2 A.Frame1 A.Frame0

76543210

CU Buffer7 CU Buffer6 CU Buffer5 CU Buffer4 CU Buffer3 CU Buffer2 CU Buffer1 CU Buffer0

72 DS586F1

CS42528

7. PARAMETER DEFINITIONS

Dynamic Range

The ratio of the rms value of the signal to the rms su m of all other spectral components over the specified

bandwidth. Dynamic Range is a signal-to-noise ratio measurement over the specified band width made

with a -60 dBFS signal. 60 dB is added to resulting m easurement to refer the measure ment to fu ll-scale.

This technique ensures that the distortion comp onents are below the noise leve l and do no t ef fec t the

measurement. This measurement technique has been accepted by the Audio Engineering Society,

AES17-1991, and the Electronic Industries Association of Japan, EIAJ CP-307. Expressed in decibels.

Total Harmonic Distortion + Noise

The ratio of the rms value of the signal to the rms su m of all other spectral components over the specified

band width (typically 10 Hz to 20 kHz), including distortion components. Expressed in decibels. Measured

at -1 and -20 dBFS as suggested in AES17-1991 Annex A.

Frequency Response

A measure of the amplitude response variation from 10 Hz to 20 kHz relative to the amplitude response

at 1 kHz. Units in decibels.

Interchannel Isolation

A measure of crosstalk between the left and right channels. Measured for each channel at the converter's

output with no signal to the input under test and a fu ll-scale signal applied to the other channel. Units in

decibels.

Interchannel Gain Mismatch

The gain difference between left and right channels. Units in decibels.

Gain Error

The deviation from the nominal full-scale analog output for a full-scale digital input.

Gain Drift

The change in gain value with temper at ur e. Units in ppm/°C.

Offset Error

The deviation of th e mid -s c a le tra n sitio n (1 11 .. .1 11 to 000. ..0 00 ) fr om the idea l. Unit s in mV.

DS586F1 73

CS42528

8. APPENDIX A: EXTERNAL FILTERS

8.1 ADC Input Filter

The analog modulator samples the input at 6.144 MH z (internal MCLK=12.288 MHz). The digital filter will

reject signals within the stopband of the filter. However, there is no rejection for input signals which are

(n ×6.144 MHz) the digital passband frequency, where n=0,1,2,... Refer to Figure 24 for a re commended

analog input buffer that will attenuate any noise energy at 6.144 MHz, in addition to providing the optimum

source impedance for the modulators. The use of capacitors that have a large voltage coefficient (such as

general-purpose ceramics) must be avoided since these can degrade signal linearity.

8.2 DAC Output Filter

The CS42528 is a li near phase design and does not include phase or amplitude compensation for an exter-

nal filter. Therefore, the DAC system phase and amplitude response will be dependent on the external an-

alog circuitry.

100 µF

100 kΩ10 kΩ

3.32 kΩ

2.8 kΩ

0.1 µF 100 µF

470 pF

C0G

634 Ω

91 Ω

2700 pF

C0G

AINL1+

AINL1-

AINR1+

AINR1-

100 µF

100 kΩ10 kΩ

3.32 kΩ

2.8 kΩ

0.1 µF 100 µF

470 pF

C0G

634 Ω

91 Ω

2700 pF

C0G

332 Ω

Figure 24. Recommended Analog Input Buffer

AINL

AINR

AOU T +

AOU T - -

390 pF

C0G 1 kΩ

22 µF

6.19 kΩ

1800 pF

C0G

887 Ω

2.94 kΩ

5.49 kΩ

1.65 kΩ

1.87 kΩ22 µF

1200 pF

C0G

5800 pF

C0G

47.5 kΩ

Analog

Out

Figure 25. Recommended Analog Output Buffer

74 DS586F1

CS42528

9. APPENDIX B: S/PDIF RECEIVER

9.1 Error Reporting and Hold Function

The UNLOCK bit indicates whether the PLL is locked to the incoming S/PDIF data. T he V bit reflects the

current validity bit status. The CONF (Confidence) bit indicates the amplitude of the eye pattern opening,

indicating a link that is close to generatin g errors. The BIP (Bi-Phase) error bit indicates an error in incoming

bi-phase coding. The PAR (Parity) bit indicates a received parity error.

The error bits are “sticky”, meaning they are set on the first occurrence of the ass ociated error and will re-

main set until the user reads the register through the control port. This enables the register to log all un-

masked errors that occurred since the last time the registe r was read.

The Receiver Errors Mask register (See “Receiver Errors Mask (address 27 h)” on page 68) allows masking

of individual errors. Th e bits in this registe r serve as masks for the correspo nding bi ts of th e Receiver Err or

reported in the re ceiver error register , invoke the occurren ce of a RERR interrupt, and affect th e current au-

dio sample according to the status of the HOLD bits. The HOLD bits allow a choice of holding the previou s

sample, replacing the curr ent sample with zero (mu te), or not chan ging the curre nt audio sample . If a mask

bit is set to 0, the error is masked, which implies the following: its occurrence will not be reported in the re-

ceiver error register, the RERR interrupt will not be generated, and the current audio sample will not be af-

fected. The QCRC and CCRC errors do not affect the current audio sample, even if unmasked.

9.2 Channel Status Data Handling

The setting of the CHS bit in the register “Channel Status Data Buffer Control (address 24h)” on page 65

determines whether the chan nel status decodes are from the A channel (CHS = 0) or B channe l (CHS = 1).

The PRO (professional) bit is extracted directly. For consumer da ta, t he COPY (c opyr ight) bit is e xtrac ted,

and the category code and L bits are decoded to determine SCMS status, indicated by the ORIG (original)

bit. If the category code is set to General on the incoming S/PDIF stream, copyright will always be indicated

even when the stream indicates no copyright. Finally, the AUDIO bit is extracted and used to set a n AUDIO

indicator, as described in section 4.4.5, Non-Audio Auto-Detection.

If 50/15 µs pre-emphasis is detected, and the Receiver Auto De-emphasis control is enabled, then de-em-

phasis will automatically be applied to the incoming digital PCM data. See “Functional Mo de (address 03h)”

on page 48 for more details.

The encoded channel status bits which indicate sample word length are decoded according to IEC 60958.

Audio data routed to the Seria l Audio In terface port is unaffec ted by the word length settings; all 24 bits are

passed on as received.

The CS42528 also contains sufficient RAM to store a full block of C data for both A and B channels

(192 x 2 = 384 bits), and also 384 bits of User (U data) information. The user may read from these buffer

RAMs through th e co ntr o l port.

The buffering scheme involves two block-sized buffers, named D and E, as shown in Figure 26. The MSB

of each byte represents the first bit in the serial C data str eam. For exa mple, the MSB of byte 0 ( which is at

control port address 4Ah) is the consumer/professional bit for channel status block A.

The first buffer (D) accepts incoming C data from the S/PDIF receiver. The 2nd buffer (E) accepts entire

blocks of data from the D buffer. The E buffer is also accessible from the control port, allowing reading of

the C data.

DS586F1 75

CS42528

9.2.1 Channel Status Data E Buff er Access

The user can monitor the incoming Chan nel Status data by reading the E buffer, which is mapped into the

ured to point to the addre ss space of the C data. This is accomplished by setting the BSEL bit to ‘0’ in the

The user can configure th e Interrupt Mask Registe r to cause an in terrup t whenever an y data- bit changes

are detected when D to E Channel Status buffer transfers occur. If no data bits have changed within the

current transfer of data from D to E, no interrupt will be generated. This allows determination of the ac-

ceptable time periods to interact with the E buffer. See “Interrupt Mask (address 21h)” on page 64 for more

details.

The E buffer is organized as 24 x 16-bit words. Fo r each word the MS Byte is the A channel data, an d the

LS Byte is the B channel data (see Figure 26). The re are two meth ods of ac cessing this memory, known

as One-Byte Mode and Two-Byte Mode. The desired mode is selected by setting the CAM bit in the Chan-

nel Status Data Buffer Control Register.

9.2.1.1 One-Byte Mode

In many applications, the channel status blocks for the A and B channels will be identical. In this situation,

the user may read a byte from one of the channel's blocks since the cor responding byte for the other ch an-

nel will likely be the same. One-Byte Mode takes advantage of the often identical nature of A and B channel

status data. When re ading d ata in One- Byte Mode, a single byte is returned, which can be fro m channel A

or B data, depending on a register control bit.

One-Byte Mode saves the user substantial control port access time, as it effectively accesses two bytes

worth of information in 1 byte's worth of access time. If the control port's auto-increment ad dressing is used

in combination with this mode, multi-byte accesses, such as full-block reads, can be done especially effi-

ciently.

9.2.1.2 Two-Byte Mode

There are those applications in which the A and B channel status blocks will not be the same, and the user

is interested in accessing both blocks. In these situations, Two-Byte Mode should be used to access the

E buffer.

In this mode, a read will cause the CS42528 to output two bytes from its control port. The first byte out will

represent the A channel status data, and the second byte will represent the B channel status data.

Control Port

From

S/PDIF

Receiver

words

8-bits 8-bits

Received

Data

Buffer

Figure 26. Channel Status Data Buffer Structure

76 DS586F1

CS42528

9.2.2 Serial Copy Management System (SCMS)

The CS42528 allows read access to all the channel status bits. For consumer mode SCMS compliance,

the host microcontroller needs to read and in terpret the Category Code, Co py bi t and L bit appro pr iately.

9.3 User (U) Data E Buffer Access

Entire blocks of U data are bu ffered us ing a cascad e of two bl ock-sized RAM s to perfor m the buffer ing as

described in the Chann el Status se ction. The user h as access to the E buffer through the control port Data

Buffer which is mappe d into the r egister space o f the CS4 2528 . The Data Buffer must first be configu red to

point to the address space of the U data. This is accomplished by setting the BSEL bit to ‘1’ in the register

“Channel Status Data Buffer Control (address 24h)” on page 65.

The user can configure the Interrupt Mask Register to cause an interrupt whenever any data bit changes

are detected when D to E Channel Status buffer transfers occur. If no data bits have changed within the

current transfer of data from D to E, no interrupt will be generated. This allows determination of the accept-

able time periods to interact with the E buffer. See “Interrupt Mask (address 2 1h)” on page 64 for more de-

tails.

The U buffer access only operates in Two-Byte Mode, since there is no concept of A and B blocks for user

data. The arrangement of the data is as follows: Bit15[A7]Bit14[B7]Bit13[A6]Bit12[B6]...Bit1[A0]Bit0[B0].

The arrangement of the data in each byte is as follows: MSB is the first received bit and is the first transmit-

ted bit. The first byte read i s the first byte received, and the first byte sent is the fir st byte tra nsmitted. Wh en

two bytes are read from the E buffer, the bits are presented in the following arrangement:

A[7]B[7]A[6]B[6]....A[0]B[0].

9.3.1 Non-Audio Auto-Detection

The CS42528 S/PDIF receiver can detect non- audio data o riginating from AC-3 or MPEG encoder s. This

is accomplished by looking for a 96-bit sync code, consisting of 0x0000, 0x0000, 0x0000, 0x0000,

0xF872, and 0x4E1F. When the sync code is detected, an internal AUTODETECT signal will be asserted.

If no additional sync codes are detected within the next 4096 frames, AUTODETECT will be de-asserted

until another sync code is detected. The AUDIO bit in the Receiver Channel Status register is the logical

OR of AUTODE TECT and the receiv ed channel status bit 1. If non-audio data is detected, the data will

be processed exactly as if it were normal audio. It is up to the user to mute the outputs as required.

9.3.1.1 Format Detection

The CS42528 can automatically detect various serial audio input formats. The Receiver Status register

(08h) is used to indicate a detected format. The register will indicate if uncompressed PCM data, IEC61937

data, DTS-LD data, DTS-CD data, HDCD data, or digital silence was detected. Additionally, the IEC619 37

Pc/Pd burst preambles are available in registers 09h-0Ch. See th e register descriptions for more informa-

tion.

DS586F1 77

CS42528

10.APPENDIX C: PLL FILTER

The PLL has been designed to only use the preambles of the S/PDIF stream to provide lock update information to

the PLL. This results in th e PLL being immune to data-d ependent jitter effects bec ause the S/PDIF preambles do

not vary with the data.

The PLL has the ability to lock onto a wide range of input sample rates with no external component changes. The

nominal center sample rate is the sample rate that the PLL first locks onto upon application of an S/PDIF data

stream.

10.1 External Filter Components

10.1.1 General

The PLL behavior is affected by the external filter compon ent values and the lockin g mode as configure d

by the LOCKM[1:0] bits in register 24h. Table 21 shows the supported configurations of PLL component

values and their associated locking modes.

Phase

Comparator

and Charge Pum p

÷N

VCO RMCK

INPUT

CRIP

CFILT

RFILT

Figure 27. PLL Block Diagram

RFILT (kΩ)CFILT (µF) CRIP (pF) LOCKM[1:0] Notes

Configuration 1 2.55 0.047 2200 00 Used for backward compatibility with Revision C

devices.

Configuration 2 2.55 0.047 2200 01 Default configuration for Revision D devices.

Provides improved wideband jitter rejection in

Double- and Quad -Speed modes.

Configuration 3 1.37 0.022 1000 10

Provides improved in-band jitter rejection, with

increased wideband jitter. Use this configuration

for best DAC and ADC performanc e when

clocked from the PLL recovered clock.

Table 21. External PLL Component Values & Lockin g Modes

78 DS586F1

CS42528

The external PLL component values listed in Table 21 have a high corner-frequency jitter-attenuation

curve, take a short time to lock, and offer good output jitter performance. It should be noted that the PLL

component values shown must be used with their associated locking modes as shown in Table 21. Use

of any other combinatio ns of component value s and locking mo de s may re su lt in unstable PLL behavior .

Configuration 1 may be used for hardware and software backward-compatibility for designs originally

made with the CS42528 Revision C.

Configuration 2 may be us ed for hardware-only backward-compatibility for designs originally made with

the CS42528 Revision C. Using the Revision D default locking mode of ‘01’ will provide improved wide-

band jitter rejection in Double- and Quad-Speed modes.

Configuration 3 may be used for new designs with the CS42528 Revision D, or for existing designs in

which the hardware and software may be changed to use the specified PLL component values and

LOCKM[1:0] register setting. This configuration provides the best DAC and ADC performance when

clocked from the PLL recovered clock.

The Typical Connection Diagram, Figure 5, shows the recommended configuration of the two capacitors

and one resistor that comprise the PLL filter. It is important to treat the LPFILT pin as a low-level analog

input. It is suggested that the ground end of the PLL filter be returned directly to the AGND pin indepen-

dently of the digital ground plane .

DS586F1 79

CS42528

10.1.2 Jitter Attenuation

Figures 28 and 29 show the jitter-attenuation characteristics for the 32-192 kHz sample rate range when

used with the external PLL component values and locking modes as specified in Table 21.

The AES3 and IEC60958-4 specifications do not have allowances for locking to sample rates less than

32 kHz or for locking to the SAI_LRCK input. These specifications state a maximum of 2 dB jitter gain or

peaking.

Figure 28. Jitter-Attenuation Characteristics of PLL - Configurations 1 & 2

Figure 29. Jitter-Attenuation Characteristics of PLL - Configuration 3

80 DS586F1

CS42528

10.1.3 Capacitor Selection

The type of capacitors used fo r the PLL filter can have a significant effect on receiver performance. Large

or exotic film capacitors are not necessary because the ir leads, and the required longer circuit bo ard trac-

es, add undesirable inductance to the circuit. Surface-mount ceramic capacitors are a good choice be-

cause their own inductance is low, and they can be mounted close to the LPFLT pin to minimize trace

inductance. For CRIP, a C0G or NPO dielectric is recommended; and for CFILT, an X7R dielectric is pre-

ferred. Avoid capacitors with large temperature co-coefficient, or capacitors with high dielectric constants,

that are sensitive to shock and vibration. These include the Z5U and Y5V dielectrics.

10.1.4 Circuit Board Layout

Board layout and capacitor choice affect each other and determine the performance of the PLL. Figure

30 illustrates a suggested layout for the PLL filter components and for bypassing the analog supply volt-

age. The 10 µF bypass capacitor is an electrolytic in a surface-mount case A or thru-hole package. RFILT,

CFILT, CRIP, and the 0.1 µF decoupling capacitor are in an 0805 form factor. The 0.01 µF decoupling

capacitor is in the 060 3 form factor. The traces are on the top surface of the board with the IC so that there

is no via inductance. The traces themselves are short to minimize th e inductance in the filt er path. The

VARX and AGND traces extend back to their o rigin and are shown only in trun ca ted for m in th e dr awing .

VARX

AGND

LPFLT

CFILT

RFILT

CRIP

0.1 µF

0.01 µF

10 µF

= via to ground plane

Figure 30. Recommended Layout Example

DS586F1 81

CS42528

11.APPENDIX D: EXTERNAL AES3-S/PDIF-IEC60958 RECEIVER

COMPONENTS

11.1 AES3 Receiver External Components

The CS42528 AES3 receiver is designed to accept only consumer-standard interfaces. The standards call

for an unbalanced circuit having a receiver impedance of 75 Ω ±5%. The connector is an RCA phono socket.

The receiver circuit is shown in Figure 31. Figure 32 shows an implementation of the Input S/PDIF Multi-

plexer using the consumer interface.

In the configuration of systems, it is important to avoid ground loops and DC curr ent flowing down the shield

of the cable that could result when boxes with different ground potentials are connected. Generally, it is

good practice to ground the shield to the chassis of the transmitting un it and connect th e shield through a

capacitor to ch assis ground at the receiver. Howe ver, in some cases, it is advantageous to have the ground

of two boxes held at the same potential and make the electrical connection through the cable shield. Gen-

erally, it may be a good idea to provide the option of grounding or capacitively coupling the shield to the

chassis.

When more than one RXP pin is driven simultaneously, as shown in Figure 32, there is a potential for

crosstalk between inputs. To minimize this crosstalk, provide as much trace separation as is reasonable and

choose non-adjacent inputs when possible.

The circuit shown in Figure 33 may be used when external RS422 receivers, optical receivers or other

TTL/CMOS logic ou tputs drive the CS42528 receiver input.

RXP7

RXP0

RXP6

75 Ω

.01µF

75 Ω

Coax

75 Ω

Coax

75 Ω

Coax

Figure 31. Consumer Input Circuit Figure 32. S/PDIF MUX Input Circuit

RC A Phono RXP0

Coax

75 Ω75 Ω

0.01 µF

RXP0

0.01 µF

TTL/CMOS

Gate

Figure 33. TTL/CMOS Input Circuit

82 DS586F1

CS42528

12.APPENDIX E: ADC FILTER PLOTS

-140

-130

-120

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

Frequency (normal iz e d t o Fs )

Amplitude (dB)

-140

-130

-120

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

0.40 0.42 0.44 0.46 0.48 0.50 0.52 0.54 0.56 0.58 0.60

Frequency (normalized to Fs)

Amplitude (dB)

Figure 34. Sin gle-Speed Mode Stopband Rejection Figure 35. Single-Speed Mode Transition Band

-10

-9

-8

-7

-6

-5

-4

-3

-2

-1

0.45 0.46 0.47 0.48 0.49 0.50 0.51 0.52 0.53 0.54 0.55

Frequency (normalized to Fs)

Amplitude (dB)

-0.10

-0.08

-0.05

-0.03

0.00

0.03

0.05

0.08

0.10

0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50

Frequency (normalized to Fs)

Amplitude (dB)

Figure 36. Single-Spe ed Mode Transition Ban d (Detail) Figure 37. Single-Speed Mod e Passband Ripple

-140

-130

-120

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

0.00.10.20.30.40.50.60.70.80.91.0

Frequency (normalized to Fs)

Amplitude (dB)

-140

-130

-120

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

0.40 0.43 0.45 0.48 0.50 0.53 0.55 0.58 0.60 0.63 0.65 0.68 0.70

Frequency (normalized to Fs)

Amplitude (dB)

Figure 38. Double-Speed Mode Stopband Rejection Figure 39. Double-Speed Mode Transition Band

DS586F1 83

CS42528

‘

-10

-9

-8

-7

-6

-5

-4

-3

-2

-1

0.40 0.43 0.45 0.48 0.50 0.53 0.55

Frequency (normalized to Fs)

Amplitude (dB)

-0.10

-0.08

-0.05

-0.03

0.00

0.03

0.05

0.08

0.10

0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50

Frequency (normalized to Fs)

Amplitude (dB)

Figure 40. Doubl e-Speed Mode Transition B and (Detail) Figure 41. Double-Speed Mode Passband Ripple

-120

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

0.00.10.20.30.40.50.60.70.80.91.0

Frequency (normalized to Fs)

Amplitude (dB)

-130

-120

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6 0.65 0.7 0.75 0.8

Frequency (normalize d t o Fs)

Amplitude (dB)

Figure 42. Quad-Speed Mode Stopband Rejection Figure 43. Quad-Speed Mode Transition Band

-10

-9

-8

-7

-6

-5

-4

-3

-2

-1

0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6

Frequency (normalized to Fs)

Amplitude (dB)

-0.10

-0.08

-0.06

-0.04

-0.02

0.00

0.02

0.04

0.06

0.08

0.10

0.00 0.05 0.10 0.15 0.20 0.25

Frequency (normalized to Fs)

Amplitude (dB)

Figure 44. Quad-Speed Mode Transition Band (Detail) Figure 45. Quad-Speed Mode Passband Ripple

84 DS586F1

CS42528

13.APPENDIX F: DAC FILTER PLOTS

0.4 0.5 0.6 0.7 0.8 0.9

120

100

Frequency(normalized to Fs)

Amplitude (dB)

0.4 0.42 0.44 0.46 0.48 0.5 0.52 0.54 0.56 0.58 0.

120

100

Frequency(normalized to Fs)

Amplitude (dB)

Figure 46. Single-Speed (fast) Stopband Rejectio n Figure 47. Single-Speed (fast) Transi tion Band

0.45 0.46 0.47 0.48 0.49 0.5 0.51 0.52 0.53 0.54 0.5

Frequency(normalized to Fs)

Amplitude (dB)

0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.

0.02

0.015

0.01

0.005

0.01

0.015

0.02

Frequency(normalized to Fs)

Amplitude (dB)

Figure 48. Single-Speed (fast) Transition Band (detail) Figure 49. Single-Speed (fast) Passband Ripple

0.4 0.5 0.6 0.7 0.8 0.9

120

100

Frequency(normalized to Fs)

Amplitude (dB)

0.4 0.42 0.44 0.46 0.48 0.5 0.52 0.54 0.56 0.58 0.

120

100

Frequency(normalized to Fs)

Amplitude (dB)

Figure 50. Single-Speed (slow) Stopband Rejection Figure 51. Single-Speed (slow) Transition Band

DS586F1 85

CS42528

0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.

0.02

0.015

0.01

0.005

0.01

0.015

0.02

Frequency(normalized to Fs)

Amplitude (dB)

0.45 0.46 0.47 0.48 0.49 0.5 0.51 0.52 0.53 0.54 0.5

Frequency(normalized to Fs)

Amplitude (dB)

Figure 52. Single-Speed (slow) Transition Band (detail) F igure 53. Single-Speed (slow) Passband Ripple

0.4 0.5 0.6 0.7 0.8 0.9

120

100

Frequency(normalized to Fs)

Amplitude (dB)

0.4 0.42 0.44 0.46 0.48 0.5 0.52 0.54 0.56 0.58 0.

120

100

Frequency(normalized to Fs)

Amplitude (dB)

Figure 54. Double-Spee d (fas t) Stop ba n d Rejec tion Figure 55. Double-Speed (fast) Transi tion Band

0.45 0.46 0.47 0.48 0.49 0.5 0.51 0.52 0.53 0.54 0.5

Frequency(normalized to Fs)

Amplitude (dB)

0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.

0.02

0.015

0.01

0.005

0.01

0.015

0.02

Frequency(normalized to Fs)

Amplitude (dB)

Figure 56. Double-Speed (fast) Transition Band (detail) Figure 57. Double-Speed (fast) Passband Ripple

86 DS586F1

CS42528

0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

120

100

Frequency(normalized to Fs)

Amplitude (dB)

0.2 0.3 0.4 0.5 0.6 0.7 0.

120

100

Frequency(normalized to Fs)

Amplitude (dB)

Figure 58. Double-Speed (slow) Stopband Rejection Figure 59. Double-Speed (slow) Transition Band

0.45 0.46 0.47 0.48 0.49 0.5 0.51 0.52 0.53 0.54 0.5

Frequency(normalized to Fs)

Amplitude (dB)

0 0.05 0.1 0.15 0.2 0.25 0.3 0.3

0.02

0.015

0.01

0.005

0.01

0.015

0.02

Frequency(normalized to Fs)

Amplitude (dB)

Figure 60. Doub le-Speed (slow) Transition Ba nd (detail) Figure 61. Double-Speed (slow) Passband Ripple

0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

120

100

Frequency(normalized to Fs)

Amplitude (dB)

0.2 0.3 0.4 0.5 0.6 0.7 0.

120

100

Frequency(normalized to Fs)

Amplitude (dB)

Figure 62. Quad-Speed (fast) Stopband Reje ction Figure 63. Quad-Speed (fast) Transition Band

DS586F1 87

CS42528

0.45 0.46 0.47 0.48 0.49 0.5 0.51 0.52 0.53 0.54 0.5

Frequency(normalized to Fs)

Amplitude (dB)

0 0.05 0.1 0.15 0.2 0.2

0.2

0.15

0.1

0.05

0.1

0.15

0.2

Frequency(normalized to Fs)

Amplitude (dB)

Figure 64. Quad-Speed (fast) Transition Band (detail) Figure 65. Quad-Speed (fast) Passband Ripple

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

120

100

Frequency(normalized to Fs)

Amplitude (dB)

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.

120

100

Frequency(normalized to Fs)

Amplitude (dB)

Figure 66. Quad-Speed (slow) Stopband Rejection Figure 67. Quad-Speed (slow ) Transition Band

0.45 0.46 0.47 0.48 0.49 0.5 0.51 0.52 0.53 0.54 0.5

Frequency(normalized to Fs)

Amplitude (dB)

0 0.02 0.04 0.06 0.08 0.1 0.1

0.02

0.015

0.01

0.005

0.01

0.015

0.02

Frequency(normalized to Fs)

Amplitude (dB)

Figure 68. Quad-Speed (slow) Transition Band (detail) Figure 69. Quad-Speed (slow) Passband Ripple

88 DS586F1

CS42528

14.PACKAGE DIMENSIONS

THERMAL CHARACTERISTICS

INCHES MILLIMETERS

DIM MIN NOM MAX MIN NOM MAX

A --- 0.55 0.063 --- 1.40 1.60

A1 0.002 0.004 0.006 0.05 0.10 0.15

B 0.007 0.008 0.011 0.17 0.20 0.27

D 0.461 0.472 BSC 0.484 11.70 12.0 BSC 12.30

D1 0. 39 0 0.39 3 BSC 0.398 9 .9 0 1 0. 0 B SC 10.10

E 0.461 0.472 BSC 0.484 11.70 12.0 BSC 12.30

E1 0.390 0.393 BSC 0.398 9.90 10.0 BSC 10.10

e* 0.016 0.020 BSC 0.024 0.40 0.50 BSC 0.60

L 0.018 0.024 0.030 0.45 0.60 0.75

∝0.000° 4° 7.000° 0.00° 4° 7.00°

* Nominal pin pitch is 0.50 mm

Controlling dimension is mm.

JEDEC Designation: MS026

Parameter Symbol Min Typ Max Units

Allowable Junction Temperature --+135

°C

Junction to Ambient Thermal Impedance θJA -48-°C/Watt

64L LQFP PACKAGE DRAWING

∝

DS586F1 89

CS42528

15.ORDERING INFORMATION

16.REFERENCES

1) Cirrus Logic, Audio Quality Measurement Specification, Version 1.0, 1997.

http://www.cirrus.com/products/papers/meas/meas.html

2) Cirrus Logic, AN18: Layout and Design Rules for Data Converters and Other Mixed Signal Devices,

Version 6.0, February 1998.

3) Cirrus Logic, AN22: Overview of Digital Audio Interface Data Structures, Version 2.0, February 1998.;

A useful tutorial on digital audio specifications.

4) Cirrus Logic, AN134: AES and S/PDIF Recommended Transformers, Version 2, April 1999.

5) Cirrus Logic, An Understanding and Implementation of the SCMS Serial Copy Management System

for Digital Audio Transmission, by Clifton Sanchez.; an excellent tutorial on SCMS. It is availa ble from

the AES as preprint 3518.

6) Cirrus Logic, Techniques to Measure and Maximize the Performance of a 120 dB, 96 kHz A/D Con-

verter Integrated Circuit, by Steven Harris, Steven Green and Ka Leung. Presented at the 103rd Con-

vention of the Audio Engineering Society, September 1997.

7) Cirrus Logic, A Stereo 16-bit Delta-Sigma A/D Converter for Digital Audio, by D.R. Welland, B.P. Del

Signore, E.J. Swanson, T. Ta naka, K. Hamashita, S. Hara, K. Takasuka. Paper presented at the 85th

Convention of the Audio Engineering Society, November 1988.

8) Cirrus Logic, The Effects of Sampling Clock Jitter on Nyquist Samplin g Analo g-to-Digital Converters,

and on Oversampling Delta Sigma ADC's , by Steven Harris. Paper presented at the 8 7th Convention

of the Audio Engineering Society, October 1989.

9) Cirrus Logic, An 18-Bit Dual-Channel Oversampling Delta-Sigma A/D Converter, with 19-Bit Mono Ap-

plication Example, by Clif Sanchez. Pap er presented at the 87th Convention of the Audio Engineering

Society, October 1989.

10)Cirrus Logic, How to Achieve Optimum Performance from Delta-Sigma A/D and D/A Converters,by

Steven Harris. Presented at the 93rd Convention of the Audio Engineering Society, October 1992.

11)Cirrus Logic, A Fifth-Order Delta-Sigma Modulator with 110 dB Audio Dynamic Range, by I. Fujimor i,

K. Hamashita and E.J. Swanson. Paper presented at the 93rd Convention of the Audio Engineering

Society, October 1992.

12) International Electrotechnical Commission, IEC60958, http://www.ansi.org

13)Philips Semiconductor, The I2C-Bus Specification: Version 2.1, January 2000. http://www.semicon-

ductors.philips.com

Product Descrip tion Package Pb-Free Grade Temp Range Container Order #

CS42528 114 dB, 192 kHz

8-Ch Codec

with S/PDIF Receiver

64-pin

LQFP YES Commercial -10° to +70° C Tray CS42528-CQZ

Tape & Reel CS42528-CQZR

Automotive -40° to +85° C Tray CS42528-DQZ

Tape & Reel CS42528-DQZR

CDB42528 CS42528 Evaluation Board No - - - CDB42528

90 DS586F1
CS42528
17.REVISION HISTORY 
Release Date Changes
A1 December 2002 Advance Release
PP1 August 2003 Preliminary Release
PP2 August 2003 – Added Revision History table.
– Updated registers 6.7.4 and 6.7.5 on page 53.
PP3 March 2004 Corrected error in document title.
PP4 July 2004 Add lead free part numbers
PP5 January 2005 – Updated PLL components in Table 2 1 on  pa ge 77.
– Added PDN_RCVR1 bit and description on page 47.
– Added LOCKM bit and description on page 65.
– Added OMCK Frequency specification in the Switching Characteristics 
table on page 12.
– Updated ADC Input Impedance and Offset Error specifications in the 
Analog Input Characteristics table on page 8.
– Updated the DAC Full Scale Voltage, Output Impedance, and Gain Drift 
specifications in the Analog Output Characteristics table on page 10.
– Updated specification conditions for the analog input characteristics on 
page 8.
– Updated specification conditions for the analog output characteristics on 
page 10.
– Updated specification of tds and tdh in the Switching Characteristics table on 
page 12.
– Corrected reference to the SW_CTRL[1:0] bits in section 4.5.3 on page 26.
– Moved the VQ and FILT+ specifications from the Analog Input 
Characteristics table on page 8 to the DC Electrical Characteristics table on 
page 15.
– Updated the Power Supply Current and Power Consumption specifications 
in the DC Electrical Char ac ter istic s tab le  on page 15.
– Updated the description of the CONF bit on page page 68.
– Updated Table 13 on page 55 to include HDCD format detection.
– Corrected default value of the Chip_ID[3:0] bits in register 01h on pages 42 
and 46.
– Updated default value of the Rev_ID[3:0] bits in register 01h on pages 42 
and 46.
F1 October 200 5 Fi na l Rele as e
– Added ordering information table on page 89.
– Updated registers 6.6.6 and 6.6.7 on page 52.
– Updated “Slave Mode” section on page 26.
– Updated specification of tdpd, and tlrpd in the Switching Characteristics table 
on page 12.
– Updated the “External Filter Components” section beginning on page 77.
– Updated LOCKM[1:0] bits and description on page 65.
– Updated RCVR_CLK[2:0] bit description on page 55.

DS586F1 91

CS42528

Contacting Cirrus Logic Support

For all product questions and inquiries contact a Cirrus Logic Sales Representative.

To find the one neare st to you go to www.cirrus.com/corporate/contacts/sales.cfm

IMPORTANT NOTICE

Cirrus Logic, Inc. and its subsidiaries (“Cirrus”) believe that the info rmation contained in this document is accu rate and reliable. However, the information is subject

to change without notice a nd is prov ided “AS IS” without war ranty of any kind (express or implie d). Cust omers are ad vised to o btain the latest version of relevant

information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale

supplied at the time of order acknowledgment, including those pertaining to warranty, indemnification, and limitation 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 infringement of pa tents or o ther rights of thir d

parties. This document is the property of Cirrus and by furnishing this information, Cirrus grants no license, express or implied under any patents, m ask work righ ts,

copyrights, tradem arks, trade secrets or oth er intellectual prop erty rights. Cirrus ow ns the copyrights a ssociated with the information contained herein and gives con-

sent for copies to be made of the information only for use within your organization with respect to Cirrus integrated circuits or other products of Cirrus. This consent

does not extend to other copying such as copying for general distribution, advertising or promotional purposes, or for creating any work for resale.

CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROP-

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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 APPLICA-

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AGENTS FROM ANY AND ALL LIABILITY, INCLUDING ATTORNEYS’ FEES AND COSTS, THAT MAY RESULT FROM OR ARISE IN CONNECTION WITH

THESE USES.

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