WM2002

Product Brief

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Product Brief, September 2013, Rev 4.1

4

PIN DESCRIPTION

A description of each pin on the WM2002 is provided below.

Note that, where multiple pins share a common name (eg. DGND), these pins should be tied together on the PCB.

PIN

NAME

TYPE

DESCRIPTION

1

LED

Analogue Output

Status LED output

2

DGND

Supply

Digital supplies ground

3

MON

Digital Input

Digital control input (changes ANC filter characteristics, selects mute

or talk-through mode)

4

ADDR

Digital Input

Control interface address select

5

SDA

Digital Input/Output

Control interface data input / output

6

SCLK

Digital Input

Control interface clock input

7

LDO1VDD

Supply

LDO1 supply input

8

LDO1VOUT

Analogue Output /

Supply

LDO1 output / Digital core supply

9

MICVDD

Supply

MICBIAS supply input

10

MICBIAS

Analogue Output

Bias supply for external microphones

11

LDO3VOUT

Analogue Output /

Supply

LDO3 output / Analogue supply

12

AGND

Supply

Analogue supplies ground

13

MICLN

Analogue Input

Left channel inverting analogue noise cancelling mic input

14

MICLP

Analogue Input

Left channel non-inverting analogue noise cancelling mic input

15

MICRP

Analogue Input

Right channel non-inverting analogue noise cancelling mic input

16

MICRN

Analogue Input

Right channel inverting analogue noise cancelling mic input

17

INLP

Analogue Input

Left channel non-inverting differential line input

18

INLN

Analogue Input

Left channel inverting differential line input

(can be grounded for single-ended operation)

19

INRN

Analogue Input

Right channel inverting differential line input

(can be grounded for single-ended operation)

20

INRP

Analogue Input

Right channel non-inverting differential line input

21

VMIDC

Analogue I/O

Midrail voltage capacitor connection point

22

LDO4VOUT

Analogue Output /

Supply

LDO4 output / Headphone driver supply

23

HPOUTLP

Analogue Output

Left headphone non-inverting output

24

HPOUTLN

Analogue Output

Left headphone inverting output

25

HPGND

Supply

Headphone driver ground

26

HPOUTRN

Analogue Output

Right headphone inverting output

27

HPOUTRP

Analogue Output

Right headphone non-inverting output

28

CPVOUT

Analogue Output

Charge pump output

29

BATTVDD

Supply

DC1 boost converter supply input / Battery supply

30

CFB2

Analogue I/O

Charge pump flyback capacitor connection

31

CFB1

Analogue I/O

Charge pump flyback capacitor connection

32

CPGND

Supply

Charge pump ground

33

DC1LX

Analogue I/O

DC1 boost converter inductor connection pin

34

DC1VOUT

Analogue Output

DC1 boost converter output

35

SYSVDD

Supply

System supply input

36

XTO

Analogue Output

Crystal drive output

37

XTI

Analogue Input

Crystal drive input or CMOS clock input

38

DGND

Supply

Digital supplies ground

39

PROGVDD

Supply

OTP Memory programming supply - normally tied to DGND

40

LDO2VOUT

Analogue Output /

Supply

LDO2 output / OTP memory supply

41

VREFC

Analogue I/O

Voltage reference capacitor connection