WM9704Q
4-Channel Surround Sound Codec
Production Data, January 2001, Rev
2.3
DESCRIPTION
WM9704Q is a high quality audio codec compliant with the
AC鈥?7 Revision 2.1 specification. It performs full duplex
18-bit codec functions from 8 to 48k samples/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. Additionally
the WM9704Q provides two proprietary modes:
4-channel quad mode enables two channels of ADC and
DAC plus an additional two DAC channels as rear outputs.
6-channel mode configures the device to provide external
support for two additional stereo outputs via the GPIO pins.
WM9704Q is interchangeable with AC鈥?7 Codecs from
Wolfson and other suppliers in the basic Revision 2.1 mode.
WM9704Q is fully operable with 3.3V or 5.0V or mixed
3.3/5.0V supplies and is packaged in an industry standard
48-pin TQFP package.
FEATURES
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4 DAC channels, stereo ADC
Balanced mixer architecture
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
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4-channel surround sound solution implemented with 2
additional internal DACs
6-channel surround sound supported via connection of a
stereo DAC (WM8725) to GPIO pins
Supports 4-channel playback of analogue sources such
as CD
BLOCK DIAGRAM
VOL/
MUTE
VOL/
MUTE
VOL/
MUTE
危
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
SERIAL
I/F
I/F
(6) BITCLK
(10) SYNC
(8) SDATAIN
危
VOL
RECORD
MUX
AND
MUTE
WM9704Q
(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?001
Wolfson Microelectronics Ltd
.
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