WM8756

Advance Information

AI Rev 1.3 October 2001

3

PIN DESCRIPTION

PIN

NAME

TYPE

DESCRIPTION

1

DIN1

Digital input

Channel 1 Serial Audio Data Input in PCM Mode.

2

DIN2

Digital input

Channel 2 Serial Audio Data Input in PCM Mode.

3

DSD0

Digital input p.d.

Channel 0 Left DSD format audio data input

4

DSD1

Digital input p.d.

Channel 0 Right DSD format audio data input

5

DSD2

Digital input p.d.

Channel 1 Left DSD format audio data input

6

DSD3

Digital input p.d.

Channel 1 Right DSD format audio data input

7

DSD4

Digital input p.d.

Channel 2 Left DSD format audio data input

8

DSD5

Digital input p.d.

Channel 2 Right DSD format audio data input

9

DSDCLK64

Digital In/Out

DSD format data clock at 64fs

10

DSDCLK128

Digital In/Out

DSD format data clock at 128fs (used in ‘modulated data’ mode)

11

MODE

Digital input

Control Method Selection Pin in PCM Mode. ‘lo’ = software mode

12

MUTE

Digital In/Out

Mute Control Pin in PCM Mode. ‘lo’ = not muted

13

LRCIN2

Digital input p.d.

Second LRCIN input for dual rate mode

14

DSDB

Digital input p.u.

DSD or PCM audio data format select; ‘lo’ = DSD mode, ‘hi’ = PCM mode

15

DGND

Supply

Digital GND

16

ML/I2S

Digital input p.u.

Software mode: in 3-Wire Serial Control mode, Latch input.

Hardware Mode: Input Format Selection:

17

MC/IWL

Digital input p.u.

Software Mode: In 3-Wire Serial Control Mode, Clock Input.

Hardware mode: Input Word Length Selection:

18

MD/DM

Digital input

Software mode: In 3-Wire Serial Control Mode, Data Input.

Hardware mode: De-emphasis selection

19

CSB

Digital input p.d.

3-wire Serial Port Chip select – active low

20

n.c.

n.c.

No internal connection

21

AVDD2

Supply

Analogue Positive DAC Reference

22

n.c.

n.c.

No internal connection

23

CAP

Analogue output

Analogue Internal Mid-Rail Reference De-Coupling Point

24

n.c.

n.c.

No internal connection

25

OUT2L

Analogue output

Left Channel 2 Output.

26

GR2

Analogue input

Channel 2 Negative Reference.

27

OUT2R

Analogue output

Right Channel 2 Output.

28

AGND1

Supply

Analogue GND

29

AGND2

Supply

Analogue GND

30

OUT1L

Analogue output

Left Channel 1 Output.

31

GR1

Analogue input

Channel 1 Negative Reference.

32

OUT1R

Analogue output

Right Channel 1 Output.

33

AGND3

Supply

Analogue GND

34

OUT0L

Analogue output

Left Channel 0 Output.

35

GR0

Analogue input

Channel 0 Negative Reference.

36

OUT0R

Analogue output

Right Channel 0 Output.

37-39

nc

nc

No internal connection

40

AVDD1

Supply

Analogue positive supply

41

nc

nc

No internal connection

42

DMSLV

Digital input p.d.

DSD mode master or slave operation select; ‘lo’ = SLAVE (clocks are input)

43

DMCKSEL

Digital input p.d.

DSD Master Mode Clock Select (lo for 256fs; hi for 384fs)

44

DVDD

Supply

Digital Positive Supply.

45

SCKI

Digital input

Master Clock Input

46

BCKIN

Digital input

Audio Data Bit Clock Input.

47

LRCIN

Digital input

DAC Sample Rate Clock Input in PCM Mode

48

DIN0

Digital input

Channel 0 Serial Audio Data Input in PCM Mode.

Note - Digital input pins have Schmitt trigger input buffers. Pins marked ‘p.u.’ or ‘p.d.’ have internal pull-up or pull down.