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PCM2904

PCM2906

SLES042C – JUNE 2002 – REVISED NOVEMBER 2007

Table 1. PCM2904 TERMINAL FUNCTIONS

TERMINAL

I/O

DESCRIPTION

NAME

NO.

AGNDC

11

–

Analog ground for codec

AGNDP

18

–

Analog ground for PLL

AGNDX

22

–

Analog ground for oscillator

D–

2

I/O

D+

1

I/O

DGND

26

–

Digital ground

DGNDU

4

–

Digital ground for USB transceiver

HID0

5

I

HID1

6

I

HID2

7

I

SEL0

8

I

SEL1

9

I

SSPND

28

O

Suspend flag, active-low (Low: suspend, High: operational)

TEST0

24

I

Test pin, must be connected to GND

TEST1

25

O

Test pin, must be left open

3

–

10

–

17

–

19

–

23

–

14

–

(4)

27

–

12

I

ADC analog input for L-channel

13

I

ADC analog input for R-channel

16

O

DAC analog output for L-channel

15

O

DAC analog output for R-channel

XTI

21

I

XTO

20

O

Crystal oscillator output

(1)

LV-TTL leveL

(2)

3.3-V CMOS-level input with internal pulldown. This pin informs the PC of serviceable control signals such as mute, volume up, or

volume down, which have no direct connection with the internal DAC or ADC. See the Interface #3 and End-Points sections.

(3)

TTL Schmitt trigger, 5-V tolerant

(4)

Connect a decoupling capacitor to GND.

(5)

3.3-V CMOS-level input

6

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