Data Sheet

USB AUDIO controller

SN11121ASF

Sonix Confidential

Do not copy, reproduce, or distribute without permission

2004 Jan13, Revision V0.3

5

3

DW(EEPROM

_ DI)

O, 4mA, SR

EEPROM data output

4

SK(EEPROM_

SK)

O, 4mA, SR

EEPROM clock pin

5

CS(EEPROM_

CS)

O, 4mA, SR

EEPROM chip select

6

XCDOUT(SPI

_DIN )

O, 4mA, SR

SPI Codec control data

7

CODECSEL

I, ST

Codec interface selection, 0: AC-link;

1: I2S

8

TAVDD/

AVDD

P

Power pin for USB transceiver

9

USBDP

I/O

USB data plus

10

USBDN

I/O

USB data minus

11

TAVSS /AVSS

P

GND pin for USB transceiver

12

XRSTN

O, 4mA, SR

Codec reset

13

RSTN

I, ST, PU

System reset pin, pull high to reset

14

VOLDN

I, ST

Volume down control, edge trigger with 64ms de-bouncing circuit

15

VOLUP

I, ST

Volume up control, edge trigger with 64ms de-bouncing circuit

16

XCSN(SPI_CS

)

O, 4mA, SR

SPI Codec chip select

17

VDD

P

3.3 V power pin

18

VSS

P

GND pin

19

GPIO3

I/O

General Purpose I/O 3

20

XSCLK1

O, 4mA, SR

I2S SCLK for play

21

XLRCK1/AC_

SYNC

O, 4mA, SR

I2S L/R frame for play / AC-link SYNC

22

XSDO1(XSD

OUT/AC_DO

UT)

O, 4mA, SR

I2S dout / AC-link dout

23

XMCLK1/AC

_Bit_CLK

O, 8mA, SR

I2S Codec master clock for play / AC-link bit clock

24

VDD

P

3.3V power pin