CS8406
192 kHz Digital Audio Interface Transmitter
Features General Description
The CS8406 is a monolithic CMOS device which en-
Complete EIAJ CP1201, IEC-60958, AES3,
codes and transmits audio data according to the AES3,
S/PDIF-compatible Transmitter
IEC60958, S/PDIF, or EIAJ CP1201 standards. The
+3.3 V or 5.0 V Digital Supply (VD)
CS8406 accepts audio and digital data, which is then
multiplexed, encoded, and driven onto a cable.
+3.3 V or 5.0 V Digital Interface (VL)
The audio data is input through a configurable, 3-wire
input port. The channel status and user bit data are in-
On-Chip Channel Status and User Bit Buffer
put through an SPI or IC microcontroller port, and
Memories Allow Block-Sized Updates
may be assembled in block-sized buffers. For systems
Flexible 3-Wire Serial Digital Audio Input Port
with no microcontroller, a Stand-Alone Mode allows di-
rect access to channel status and user bit data pins.
Up to 192-kHz Frame Rate
The CS8406 is available in a 28-pin TSSOP and SOIC
package for both Co mmercial (-10to+70C) and
Microcontroller Write Access to Channel Status
Automotive grade (-40to+85C). The CDB8416
and User Bit Data
Demonstration board is also available for device
On-Chip Differential Line Driver
evaluation and implementation suggestions. Please
refer to Ordering Information on page 34 for complete
Generates CRC Codes and Parity Bits
details.
Target applications include A/V Receivers, CD-R, DVD
Stand-Alone Mode Allows Use without a
receivers, digital mixing consoles, effects processors,
Microcontroller
set-top boxes, and computer and automotive audio
systems.
VD VL GND
RXP
AES3
TXP
S/PDIF
C or U Data Buffer
Encoder
Driver
TXN
ILRCK
Serial
Audio
ISCLK
TCBL
Input
SDIN
Control Port & Output Clock
Misc. Generator
Registers
Control
H/S RST USDA/ SCL/ AD1/ AD0/ AD2 INT OMCK
CDOUT CCLK CDIN CS
Copyright Cirrus Logic, Inc. 2012
AUG '12
(All Rights Reserved)
CS8406
TABLE OF CONTENTS
1. CHARACTERISTICS AND SPECIFICATIONS ..................................................................................... 4
SPECIFIED OPERATING CONDITIONS.............................................................................................. 4
ABSOLUTE MAXIMUM RATINGS ........................................................................................................4
DC ELECTRICAL CHARACTERISTICS ............................................................................................... 4
DIGITAL INPUT CHARACTERISTICS.................................................................................................. 5
DIGITAL INTERFACE SPECIFICATIONS ............................................................................................ 5
TRANSMITTER CHARACTERISTICS .................................................................................................. 5
SWITCHING CHARACTERISTICS .......................................................................................................5
SWITCHING CHARACTERISTICS - SERIAL AUDIO PORTS ............................................................. 6
SWITCHING CHARACTERISTICS - CONTROL PORT - SPI MODE................................................... 7
SWITCHING CHARACTERISTICS - CONTROL PORT - IC MODE.................................................... 8
2. TYPICAL CONNECTION DIAGRAMS .................................................................................................. 9
3. GENERAL DESCRIPTION .................................................................................................................. 11
3.1 AES3 and S/PDIF Standards Documents .................................................................................... 11
4. THREE-WIRE SERIAL INPUT AUDIO PORT ..................................................................................... 12
5. AES3 TRANSMITTER ......................................................................................................................... 13
5.1 TXN and TXP Drivers ................................................................................................................... 13
5.2 Mono Mode Operation .................................................................................................................. 13
5.3 Transmitted Frame and Channel Status Boundary Timing ........................................................... 13
6. CONTROL PORT DESCRIPTION ....................................................................................................... 16
6.1 SPI Mode ...................................................................................................................................... 16
6.2 IC Mode ....................................................................................................................................... 17
7. CONTROL PORT REGISTER SUMMARY ......................................................................................... 18
8. CONTROL PORT REGISTER BIT DEFINITIONS .............................................................................. 19
8.1 Memory Address Pointer (MAP) ................................................................................................... 19
8.2 Default = 000000Control 1 (01h) ................................................................................................. 19
8.3 Control 2 (02h) .............................................................................................................................. 19
8.4 Data Flow Control (03h) ............................................................................................................... 20
8.5 Clock Source Control (04h) .......................................................................................................... 20
8.6 Serial Audio Input Port Data Format (05h) ................................................................................... 21
8.7 Interrupt 1 Status (07h) (Read Only) ............................................................................................ 22
8.8 Interrupt 2 Status (08h) (Read Only) ............................................................................................ 22
8.9 Interrupt 1 Mask (09h) .................................................................................................................. 22
8.10 Interrupt 1 Mode MSB (0Ah) and Interrupt 1 Mode LSB (0Bh) ................................................... 23
8.11 Interrupt 2 Mask (0Ch) ................................................................................................................ 23
8.12 Interrupt 2 Mode MSB (0Dh) and Interrupt Mode 2 LSB (0Eh) ..................................................23
8.13 Channel Status Data Buffer Control (12h) ..................................................................................23
8.14 User Data Buffer Control (13h) ................................................................................................... 24
8.15 Channel Status Bit or User Bit Data Buffer (20h - 37h) .............................................................. 24
8.16 CS8406 I.D. and Version Register (7Fh) (Read Only) ................................................................ 24
9. PIN DESCRIPTION - SOFTWARE MODE ....................................................................................... 25
10. HARDWARE MODE .......................................................................................................................... 27
10.1 Channel Status, User and Validity Data ..................................................................................... 27
10.2 Serial Audio Port ......................................................................................................................... 28
11. PIN DESCRIPTION - HARDWARE MODE ....................................................................................... 29
12. APPLICATIONS ................................................................................................................................ 31
12.1 Reset, Power Down and Start-Up .............................................................................................. 31
12.2 ID Code and Revision Code ....................................................................................................... 31
12.3 Power Supply, Grounding, and PCB layout ................................................................................ 31
12.4 Synchronization of Multiple CS8406s ......................................................................................... 31
13. PACKAGE DIMENSIONS ................................................................................................................ 32
14. ORDERING INFORMATION ............................................................................................................. 34
2 DS580F6