WM9704Q Datasheet, PDF (1/35 Pages) Wolfson Microelectronics plc – 4-Channel Surround Sound Codec

DESCRIPTION
WM9704Q is a high quality audio codec compliant with the
AC’97 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’97 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.
WM9704Q
4-Channel Surround Sound Codec
Production Data, January 2001, Rev 2.3
FEATURES
• 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
• 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
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
WM9704Q
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: [phone]
Fax: [phone]
Email: [e-mail]
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.