WM9705 datasheet(7/55 Pages) WOLFSON

7 / 55 page

WM9705

Production Data

PD Rev 4.4 August 2006

PIN DESCRIPTION

48 PIN QFN

48 PIN TQFP

TYPE

DESCRIPTION

DVDD1

Supply

Digital positive supply

XTLIN

Digital input

Clock crystal connection or clock input (XTAL not used)

XTLOUT

Digital output

Clock crystal connection

DGND1

Supply

Digital ground supply

SDATAOUT

Digital input

Serial data input

BITCLK

Digital output

Digital input

Serial interface clock output to AC’97 controller

or input from AC'97 primary codec

DGND2

Supply

Digital ground supply

SDATAIN

Digital output

Serial data output to AC’97 controller

DVDD2

Supply

Digital positive supply

SYNC

Digital input

Serial interface sync pulse from AC’97 controller

RESETB

Digital input

NOT reset input (active low, resets registers)

PCBEEP

Analogue input

Mixer input, typically for PCBEEP signal (also input to AUX ADC)

PHONE

Analogue input

PHONE input (also input to AUX ADC)

X+/AUXL

Analogue I/O

Pen X+ channel screen driver/input. (or AUXL mixer input)

X-/AUXR

Analogue I/O

Pen X- channel screen driver/input (or AUXR mixer input)

Y+/VIDL

Analogue I/O

Pen Y+ channel screen driver/input (or VIDL mixer input)

Y-/VIDR

Analogue I/O

Pen Y- channel screen driver/input (or VIDR mixer input)

CDL

Analogue input

Mixer input, typically for CD signal

CDGND

Analogue input

CD input common mode reference (ground)

CDR

Analogue input

Mixer input, typically for CD signal

MIC1

Analogue input

Mixer input with extra gain if required – also HSET detect input

MIC2

Analogue input

Mixer input with extra gain if required

LINEINL

Analogue input

Mixer input, typically for LINE signal

LINEINR

Analogue input

Mixer input, typically for LINE signal

AVDD1

Supply

Analogue positive supply for screen drivers

AGND1

Supply

Analogue ground supply for screen drivers

VREF

Analogue output

Internal reference (buffered CAP2)

VREFOUT

Analogue output

Reference for microphones (buffered CAP2)

PDRES

Analogue input

Pen Down Detect Pull-up external resistor connection

AUXADC

Analogue input

AUX signal input to digitiser ADC

BMON

Analogue input

Battery input to ADC

CAP2

Analogue I/O

Reference input/output; pulls to midrail if not overdriven

CX3D1

Analogue output

Output pin for 3D difference signal

CX3D2

Analogue input

Input pin for 3D difference signal

LINEOUTL

Analogue output

Main analogue output for left channel

LINEOUTR

Analogue output

Main analogue output for right channel

MONOOUT

Analogue output

Main mono output

AVDD2

Supply

Analogue positive supply

HPOUTL

Analogue output

Left channel line level output (or headphone, or headset mic input)

HPGND

Supply

Headphone ground supply

HPOUTR

Analogue output

Right channel line level output (or headphone)

AGND2

Supply

Analogue ground supply

MASK/LRC

Digital bidir

MASK input signal to delay PEN conversions (or LRCLK output)

SPEN/I

Digital bidir

SPDIF hardware enable pin and I

2S data output

CID0

Digital input

Primary/Secondary ID select (internal pull-up) Hi = Primary

PENDET

Digital output

Pen Down Detection flag OR Headset detect output

EAPD/BUSY

Digital output

External amplifier powerdown or BUSY output flag from Pen ADC

SPDIF

Digital output

S/PDIF output

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

WM9705 Datasheet(PDF) 7 Page - Wolfson Microelectronics plc

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