wm9708 Wolfson Microelectronics plc, wm9708 Datasheet - Page 14

• Manufacturer Part Number: wm9708
• Description: Ac?97 Revision 2.1 Audio Codec
• Manufacturer: Wolfson Microelectronics plc

WM9708
GAIN CONTROL REGISTER LOCATION
MASTER SUPPORT
CONTROL INTERFACE
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Table 1 Variable Sample Rates Supported
Table 2 Gain Control Register Location
WM9708 supports operation as a master codec. Fundamentally, a device identified as a
master produces a BITCLK as an input.
A digital interface has been provided to control the WM9708 and transfer data to and from it. This
serial interface is compatible with the Intel AC’97 specification.
The main control interface functions are:
•
•
•
SAMPLE RATE
Volume
Mixer
Control of analogue gain and signal paths through the mixer
Bi-directional transfer of ADC and DAC words to and from AC’97 controller
Selection of Powerdown down modes.
PGA
DAC
11025
16000
22050
32000
44100
48000
AUDIO
8000
CONTROL REGISTER
18h
72h
02h
CONTROL VALUE
D15-D0
7D00
AC44
BB80
1F40
2B11
3E80
5622
MUTE DEFAULT
Muted (bit-15)
Not-muted (bit-15)
Muted (15)
PD, Rev 4.2, August 2009
Production Data
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