CS8405A

2

DS469F2

TABLE OF CONTENTS

1. CHARACTERISTICS AND SPECIFICATIONS ........................................................................ 4

SPECIFIED OPERATING CONDITIONS ................................................................................. 4

ABSOLUTE MAXIMUM RATINGS ........................................................................................... 4

DC ELECTRICAL CHARACTERISTICS................................................................................... 5

DIGITAL INPUT CHARACTERISTICS ..................................................................................... 5

DIGITAL INTERFACE SPECIFICATIONS................................................................................ 5

TRANSMITTER CHARACTERISTICS ..................................................................................... 5

SWITCHING CHARACTERISTICS .......................................................................................... 6

SWITCHING CHARACTERISTICS - SERIAL AUDIO PORTS................................................. 6

SWITCHING CHARACTERISTICS - CONTROL PORT - SPI MODE...................................... 8

SWITCHING CHARACTERISTICS - CONTROL PORT - I²C MODE....................................... 9

2. TYPICAL CONNECTION DIAGRAM ...................................................................................... 10

3. GENERAL DESCRIPTION ..................................................................................................... 11

3.1 AES3 and S/PDIF Standards Documents ........................................................................ 11

4. THREE-WIRE SERIAL INPUT AUDIO PORT ........................................................................ 11

5. AES3 TRANSMITTER ............................................................................................................ 13

5.1 Transmitted Frame and Channel Status Boundary Timing .............................................. 13

5.2 TXN and TXP Drivers ...................................................................................................... 13

5.3 Mono Mode Operation ..................................................................................................... 13

6. CONTROL PORT DESCRIPTION AND TIMING .................................................................... 15

6.1 SPI Mode ......................................................................................................................... 15

6.2 I²C Mode .......................................................................................................................... 15

6.3 Interrupts .......................................................................................................................... 16

7. CONTROL PORT REGISTER SUMMARY ........................................................................... 17

7.1 Memory Address Pointer (MAP) ....................................................................................... 17

8. CONTROL PORT REGISTER BIT DEFINITIONS .................................................................. 18

8.1 Control 1 (01h) .................................................................................................................. 18

8.2 Control 2 (02h) .................................................................................................................. 18

8.3 Data Flow Control (03h).................................................................................................... 19

8.4 Clock Source Control (04h)............................................................................................... 19

8.5 Serial Audio Input Port Data Format (05h)........................................................................ 20

8.6 Interrupt 1 Status (07h) (Read Only)................................................................................. 21

8.7 Interrupt 2 Status (08h) (Read Only)................................................................................. 21

8.8 Interrupt 1 Mask (09h)....................................................................................................... 21

8.9 Interrupt 1 Mode MSB (0Ah) and Interrupt 1 Mode LSB (0Bh) ......................................... 22

8.10 Interrupt 2 Mask (0Ch) .................................................................................................... 22

8.11 Interrupt 2 Mode MSB (0Dh) and Interrupt Mode 2 LSB (0Eh)....................................... 22

8.12 Channel Status Data Buffer Control (12h) ...................................................................... 23

8.13 User Data Buffer Control (13h) ....................................................................................... 23

8.14 Channel Status bit or User bit Data Buffer (20h - 37h) ................................................... 24

8.15 CS8405A 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 Formats .............................................................................................. 27

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 CS8405As .......................................................................... 31

13. PACKAGE DIMENSIONS ................................................................................................... 32