WM9704M Datasheet, PDF(1/37 Page) Wolfson Microelectronics plc

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WM9704M Datasheet, PDF (1/37 Pages) Wolfson Microelectronics plc – AMC97 Audio and Modem Codec

DESCRIPTION

WM9704M is a high quality audio codec compliant with the

AC'97 Revision 2.1 specification. The WM9704M has a

proprietary mode which can meet the requirements of an

AMCâ97 codec. It performs full duplex 18-bit codec functions

from 8 to 48ksamples/s and offers excellent quality with

high SNR. Features include 3D sound and line-level

outputs. Support is also provided for variable sample rates

and master/slave mode operation.

In modem mode the device supports simultaneous modem

and stereo playback.

WM9704M is interchangeable with AC'97 Codecs from

Wolfson and other suppliers in the basic Revision 2.1 mode.

WM9704M is fully operable with 3.3V or 5V or mixed

3.3/5.0V supplies and is packaged in an industry standard

48-pin TQFP package.

WM9704M

AMCâ97 Audio and Modem Codec

Production Data, January 2001, Rev 3.2

FEATURES

â¢ 4 DAC channels, stereo ADC

â¢ S/N ratio > 95dB

â¢ Variable rate audio and modem support

â¢ Analogue 3D stereo enhancement

â¢ Line level outputs

â¢ Master/slave ID selection

â¢ Low power implementation

â¢ 3.3V or 5V operation

â¢ 48-pin TQFP package

APPLICATIONS

â¢ Simultaneous modem operation and stereo playback

BLOCK DIAGRAM

CD (18,20)

LINEIN (23,24)

VIDEO (16,17)

AUX (14,15)

PHONE (13)

PCBEEP (12)

MIC[1] (21)

MIC[2] (22)

MUX

VOL/

MUTE

VOL/

MUTE

KEY:

MONO

STEREO

VOL/

MUTE

VOL/

MUTE

VOL/

MUTE

VOL/

MUTE

VOL/

MUTE

0dB/

20dB

VOL/

MUTE

Î£

VOL/

MUTE

VOL/

MUTE

Î£

REV. 2.1

SWITCH

Î£

MUX

VOL/

MUTE

VOL/

MUTE

VOL/

MUTE

VOL/

MUTE

REAR

STEREO

DAC

FRONT

STEREO

DAC

SRC

Î£

WM9704M

SSEEIIRR//FFIIAALL

RECORD

MUX

AND

MUTE

VOL

STEREO

ADC

SRC

MASTER/

SLAVE

SELECT

GENERAL IO

SUPPORT

OSC

(35,36)

LINEOUT

(FRONT)

(39,41)

LINEOUT

(REAR)

(37) MONOOUT

(40) MODE1

(30) MODE0

(47) EAPD

(6) BITCLK

(10) SYNC

(8) SDATAIN

(5) SDATAOUT

(11) RESETB

(45) CID0

(46) CID1

(43,44,48)

GPIO[1:3]

(2) XTLIN

(3) XTLOUT

WOLFSON MICROELECTRONICS LTD

Lutton Court, Bernard Terrace, Edinburgh, EH8 9NX, UK

Tel: +44 (0) 131 667 9386

Fax: +44 (0) 131 667 5176

Email: sales@wolfson.co.uk

http://www.wolfson.co.uk

Production Data datasheets contain final

specifications current on publication date.

Supply of products conforms to Wolfson

Microelectronicsâ Terms and Conditions.

ï 2001 Wolfson Microelectronics Ltd.

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