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