CS8420 datasheet(2/80 Pages) CIRRUS

2 / 80 page

CS8420

DS245PP2

TABLE OF CONTENTS

1. CHARACTERISTICS/SPECIFICATIONS ................................................................................. 5

PERFORMANCE SPECIFICATIONS ....................................................................................... 5

DIGITAL FILTER CHARACTERISTICS.................................................................................... 5

POWER AND THERMAL CHARACTERISTICS....................................................................... 5

DIGITAL CHARACTERISTICS ................................................................................................. 6

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

SWITCHING CHARACTERISTICS - SERIAL AUDIO PORTS................................................. 7

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

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

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

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

4. DATA I/O FLOW AND CLOCKING OPTIONS ....................................................................... 12

5. SAMPLE RATE CONVERTER (SRC) .................................................................................... 15

5.1 Dither ............................................................................................................................... 15

5.2 SRC Locking, Varispeed and the Sample Rate Ratio Register ....................................... 15

6. THREE-WIRE SERIAL AUDIO PORTS ................................................................................. 16

7. AES3 TRANSMITTER AND RECEIVER ................................................................................ 19

7.1 AES3 Receiver ................................................................................................................. 19

7.1.1 PLL, Jitter Attenuation, and Varispeed ................................................................ 19

8. OMCK OUT ON RMCK ...........................................................................................................21

9. PLL EXTERNAL COMPONENTS .......................................................................................... 21

9.1 Error Reporting and Hold Function .................................................................................. 21

9.2 Channel Status Data Handling ......................................................................................... 21

9.3 User Data Handling .......................................................................................................... 22

9.4 Non-Audio Auto Detection ............................................................................................... 22

9.5 AES3 Transmitter ............................................................................................................. 23

9.5.1 Transmitted Frame and Channel Status Boundary Timing ................................. 23

9.5.2 TXN and TXP Drivers .......................................................................................... 23

9.6 Mono Mode Operation ..................................................................................................... 24

10. CONTROL PORT DESCRIPTION AND TIMING .................................................................. 26

10.1 SPI Mode ....................................................................................................................... 26

10.2 I2C Mode ........................................................................................................................ 27

10.3 Interrupts ........................................................................................................................ 27

11. CONTROL PORT REGISTER BIT DEFINITIONS ................................................................ 28

12. SYSTEM AND APPLICATIONS ISSUES ............................................................................. 44

12.1 Reset, Power Down and Start-up Options ..................................................................... 44

12.2 ID Code and Revision Code .......................................................................................... 44

Contacting Cirrus Logic Support

For a complete listing of Direct Sales, Distributor, and Sales Representative contacts, visit the Cirrus Logic web site at:

http://www.cirrus.com/corporate/contacts/

Preliminary product information describes products which are in production, but for which full characterization data is not yet available. Advance product infor-

mation describes products which are in development and subject to development changes. Cirrus Logic, Inc. has made best efforts to ensure that the information

contained in this document is accurate and reliable. However, the information is subject to change without notice and is provided “AS IS” without warranty of

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