WM9704M 查看數據表（PDF） - Wolfson Microelectronics plc
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WM9704M Datasheet PDF : 37 Pages
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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’97 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
AMC’97 Audio and Modem Codec
Production Data, January 2001, Rev 3.2
FEATURES
• 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
• 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
Σ
VOL/
MUTE
VOL/
MUTE
Σ
REV. 2.1
SWITCH
Σ
MUX
VOL/
MUTE
VOL/
MUTE
VOL/
MUTE
VOL/
MUTE
REAR
STEREO
DAC
FRONT
STEREO
DAC
SRC
SRC
3D
Σ
Σ
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
Microelectronics’ Terms and Conditions.
2001 Wolfson Microelectronics Ltd.
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