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WM9703CFT/V

Description
AC97 Revision 2.1 Audio Codec
File Size234KB,30 Pages
ManufacturerWolfson Microelectronics plc (Cirrus Logic)
Websitehttp://www.wolfson.co.uk
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WM9703CFT/V Overview

AC97 Revision 2.1 Audio Codec

WM9703
AC’97 Revision 2.1 Audio Codec
Production Data, January 2001, Rev 3.4
DESCRIPTION
WM9703 is a high-quality stereo audio codec compliant
with the AC’97 Revision 2.1 specification. It performs full
duplex 18-bit codec functions and supports variable
sample rates from 8 to 48k samples/s and offers excellent
quality with high SNR. Additional features include 3D
sound and line-level outputs. In addition, support is
provided for variable sample rates and accommodation is
made for master/slave mode operation.
WM9703 is interchangeable with AC’97 codecs from
Wolfson and other suppliers. The WM9703 is fully
operable on 3.3V or 5V or mixed 3.3/5V supplies, and is
packaged in the industry standard 48-pin TQFP package
with 7mm-body size.
AC’97 FEATURES
3.3V or 5V operation
18-bit stereo codec
S/N ratio > 95dB
Multiple stereo input mixer
Mono and stereo volume control
48-pin TQFP package
Power management features
Low power implementation
Very low standby power
AC’97 REVISION 2.1 FEATURES
Variable rate audio (VRA) support
Analogue 3D stereo enhancement
Line level outputs
Supports Revision. 2.1 specified modem sample rates
and filtering
Master/slave ID selection
PC-beep connection when device held reset
BLOCK DIAGRAM
VOL/
MUTE
VOL/
MUTE
Σ
VOL/
MUTE
VOL/
MUTE
(35,36) LINEOUT
(39,41) LNLVLOUT
Σ
KEY:
MONO
STEREO
VOL
STEREO
DAC
MUX
VOL/
MUTE
(37) MONOOUT
SRC
(47) EAPD
VOL/
MUTE
VOL/
MUTE
VOL/
MUTE
VOL/
MUTE
VOL/
MUTE
3D
(6) BITCLK
Σ
Σ
WM9703
SERIAL
I/F
(10) SYNC
(8) SDATAIN
(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)
VOL
RECORD
MUX
AND
MUTE
0dB/
20dB
STEREO
ADC
SRC
MASTER/
SLAVE
SELECT
(45) CID[0]
(46) CID[1]
(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 5176Email: 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’ Terms and Conditions.
2001 Wolfson Microelectronics Ltd
.

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Description AC97 Revision 2.1 Audio Codec AC97 Revision 2.1 Audio Codec
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