WM8959 datasheet(5/155 Pages) WOLFSON

5 / 155 page

Pre-Production

WM8959

PP, May 2008, Rev 3.1

PIN DESCRIPTION

PIN NO

NAME

TYPE

DESCRIPTION

MICBIAS

Analogue Output

Microphone bias

LIN1

Analogue Input

Left channel single-ended MIC input /

Left channel negative differential MIC input

LIN2

Analogue Input

Left channel line input /

Left channel positive differential MIC input

LIN3 /

GPI7

Analogue Input /

Digital Input

Left channel line input /

Left channel negative differential MIC input /

Accessory or button detect input pin

LIN4 /

RXN

Analogue Input

Left channel line input /

Left channel positive differential MIC input /

Mono differential negative input (Rx voice -)

RIN1

Analogue Input

Right channel single-ended MIC input /

Right channel negative differential MIC input

RIN2

Analogue Input

Right channel line input /

Right channel positive differential MIC input

RIN3 /

GPI8

Analogue Input /

Digital Input

Right channel line input /

Right channel negative differential MIC input /

Accessory or button detect input pin

RIN4 /

RXP

Analogue Input

Left channel line input /

Left channel positive differential MIC input /

Mono differential positive input (Rx voice +)

DCVDD

Supply

Digital core supply

DGND

Supply

Digital ground (Return path for both DCVDD and DBVDD)

DBVDD

Supply

Digital buffer (I/O) supply

AVDD

Supply

Analogue supply

AGND

Supply

Analogue ground (Return path for AVDD)

HPVDD

Supply

Headphone supply

HPGND

Supply

Headphone ground (Return path for HPVDD)

SPKVDD

Supply

Supply for speaker driver

SPKGND

Supply

Ground for speaker driver (Return path from SPKVDD)

MCLK

Digital Input

Master clock

BCLK

Digital Input / Output

Audio interface bit clock

DACLRC

Digital Input / Output

Audio interface DAC left / right clock

DACDAT

Digital Input

DAC digital audio data

GPIO1

Digital Input / Output

GPIO1 pin

MODE

Digital Input

Selects 2-wire or 3/4 -wire control

CSB / ADDR

Digital Input

3/4 -wire chip select or 2-wire address select

SCLK

Digital Input

Control interface clock input

SDIN

Digital Input / Output

Control interface data input / 2-wire acknowledge output

SPKP

Analogue Output

Speaker positive output

SPKN

Analogue Output

Speaker negative output

LOUT

Analogue Output

Left headphone output

ROUT

Analogue Output

Right headphone output

OUT3

Analogue Output

Inverted left headphone output / Mono inverted output

OUT4

Analogue Output

Inverted right headphone output / Mono non-inverted output

LON

Analogue Output

Negative left line output / Positive right line output

LOP

Analogue Output

Positive left line output

RON

Analogue Output

Negative right line output / Positive left line output

ROP

Analogue Output

Positive right line output

VMID

Analogue Output

Midrail voltage decoupling capacitor

GPIO3 /

BCLK2

Digital Input / Output

Alternative BCLK / GPIO pin

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