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WM9704M

AMC鈥?7 Audio and Modem Codec

Production Data, January 2001, Rev 3.2

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

AMC鈥?7 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.

FEATURES

鈥?/div>

4 DAC channels, stereo ADC

S/N ratio > 95dB

Variable rate audio and modem support

Analogue 3D stereo enhancement

Line level outputs

Master/slave ID selection

Low power implementation

3.3V or 5V operation

48-pin TQFP package

APPLICATIONS

鈥?/div>

Simultaneous modem operation and stereo playback

BLOCK DIAGRAM

VOL/

MUTE

VOL/

MUTE

VOL/

MUTE

危

REV. 2.1

SWITCH

VOL/

MUTE

(35,36)

LINEOUT

(FRONT)

VOL/

MUTE

KEY:

MONO

STEREO

危

MUX

VOL/

MUTE

VOL/

MUTE

(39,41)

LINEOUT

(REAR)

(37) MONOOUT

VOL/

MUTE

REAR

STEREO

DAC

FRONT

STEREO

DAC

SRC

(40) MODE1

(30) MODE0

VOL/

MUTE

SRC

(47) EAPD

3D

VOL/

MUTE

VOL/

MUTE

VOL/

MUTE

VOL/

MUTE

VOL/

MUTE

危

SERIAL

I/F

(6) BITCLK

(10) SYNC

(8) SDATAIN

危

VOL

RECORD

MUX

AND

MUTE

WM9704M

(5) SDATAOUT

(11) RESETB

CD (18,20)

LINEIN (23,24)

VIDEO (16,17)

AUX (14,15)

PHONE (13)

PCBEEP (12)

MIC[1] (21)

MUX

MIC[2] (22)

STEREO

ADC

SRC

0dB/

20dB

MASTER/

SLAVE

SELECT

GENERAL IO

SUPPORT

(45) CID0

(46) CID1

(43,44,48)

GPIO[1:3]

(2) XTLIN

(3) XTLOUT

OSC

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

Microelectronics鈥?Terms and Conditions.

餂?/div>

2001 Wolfson Microelectronics Ltd

.

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