WM8983

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PP Rev 1.1 August 2005

4

PIN DESCRIPTION

PIN

NAME

TYPE

DESCRIPTION

1

LIP

Analogue input

Left MIC pre-amp positive input

2

LIN

Analogue input

Left MIC pre-amp negative input

3

L2/GPIO2

Analogue input

Left channel line input/secondary mic pre-amp positive input/GPIO2 pin

4

RIP

Analogue input

Right MIC pre-amp positive input

5

RIN

Analogue input

Right MIC pre-amp negative input

6

R2/GPIO3

Analogue input

Right channel line input/secondary mic pre-amp positive input/GPIO3 pin

7

LRC

Digital Input / Output

DAC and ADC sample rate clock

8

BCLK

Digital Input / Output

Digital audio bit clock

9

ADCDAT

Digital Output

ADC digital audio data output

10

DACDAT

Digital Input

DAC digital audio data input

11

MCLK

Digital Input

Master clock input

12

DGND

Supply

Digital ground

13

DCVDD

Supply

Digital core logic supply

14

DBVDD

Supply

Digital buffer (I/O) supply

15

CSB/GPIO1

Digital Input / Output

3-Wire control interface chip Select / GPIO1 pin

16

SCLK

Digital Input

3-Wire control interface clock input / 2-wire control interface clock input

17

SDIN

Digital Input / Output

3-Wire control interface data input / 2-Wire control interface data input

18

MODE

Digital Input

Control interface selection

19

AUXL

Analogue input

Left auxillary input

20

AUXR

Analogue input

Right auxillary input

21

OUT4

Analogue Output

right line output or mono mix output

22

OUT3

Analogue Output

mono or left line output

23

ROUT2

Analogue Output

Headphone or line output right 2

24

AGND2

Supply

Analogue ground (feeds ROUT2/LOUT2 and OUT3/OUT4)

25

LOUT2

Analogue Output

Headphone or line output left 2

26

AVDD2

Supply

Analogue supply (feeds output amplifiers ROUT2/LOUT2 and OUT3/OUT4)

27

VMID

Reference

Decoupling for ADC and DAC reference voltage

28

AGND1

Supply

Analogue ground (feeds all input amplifiers, PLL, ADC and DAC, internal

bias circuits, output amplifiers LOUT1, ROUT1)

29

ROUT1

Analogue Output

Headphone or line output right 1

30

LOUT1

Analogue Output

Headphone or line output left 1

31

AVDD1

Supply

Analogue supply (feeds all input amplifiers, PLL, ADC and DAC, internal

bias circuits, output amplifiers LOUT1, LOUT2))

32

MICBIAS

Analogue Output

Microphone bias

Note:

It is recommended that the QFN ground paddle should be connected to analogue ground on the application PCB.