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Revision 1.5, October 11, 2002
11
Data Sheet
VT1616 6-Channel AC97 Codec with S/PDIF
Phone Input Volume Control Register (Index 0Ch)
Mute
Phone Input Mute Control
“1” :
Mute enabled
“0” :
Mute disabled
GN[4:0]
Phone Input Volume Control
These five bits select the gain appliedto the Phone Input signal. The gain is programmable from -
34.5dB to 12dB in 1.5dB increments, providing a total of 32 programmable levels. Please refer to
Table 3 on page 14 for details.
Mic Input Volume Control Register (Index 0Eh)
Mute
Mic Input Mute Control
“1” :
Mute enabled
“0” :
Mute disabled
20dB
Mic Boost Control
“1” :
Fixed20dB gain enabled
“0” :
Fixed20dB gain disabled
GN[4:0]
Mic Input Volume Control
These five bits select the gain appliedto the Mic Input signal. The gain is programmable from -
34.5dB to 12dB in 1.5dB increments, providing a total of 32 programmable levels. Please refer to
Table 3 on page 14 for details.
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Default
Mute
–––
––––
–––
GN4
GN3
GN2
GN1
GN0
8008h
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Default
Mute
–––
––––
–
20dB
–
GN4
GN3
GN2
GN1
GN0
8008h