ICE1230 IC Ensemble, ICE1230 Datasheet - Page 15

• Manufacturer Part Number: ICE1230
• Description: ac 97 Audio Codec
• Manufacturer: IC Ensemble

Preliminary
Register Description ( continued... )
PC Beep Input Volume Control Register (Index 0Ah)
Mute
PV[3:0]
Phone Input Volume Control Register (Index 0Ch)
Mute
GN[4:0]
Mic Input Volume Control Register (Index 0Eh)
Mute
20dB
GN[4:0]
Rev. 1.3, 9/21/98
Mute
Mute
Mute
D15
D15
D15
D14
D14
D14
–
–
–
D13
D13
D13
–
–
–
PC Beep Input Mute Control
“1” :
“0” :
PC Beep Input Volume Control
These four bits select the level of attenuation applied to the PC beep input signal. The
level of attenuation is programmable from 0dB to -45dB in 3dB increments, providing a
total of 16 programmable levels. The beep gain is set at 0dB when PV[3:0] = 0h.
Phone Input Mute Control
“1” :
“0” :
Phone Input Volume Control
These five bits select the gain applied to 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 15 on page 19 for details.
Mic Input Mute Control
“1” :
“0” :
Mic Boost Control
“1” :
“0” :
Mic Input Volume Control
These five bits select the gain applied to 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 15 on page 19 for details.
D12
D12
D12
–
–
–
D11
D11
D11
–
–
–
Mute enabled
Mute disabled
Mute enabled
Mute disabled
Mute enabled
Mute disabled
Fixed 20dB gain enabled
Fixed 20dB gain disabled
D10
D10
D10
–
–
–
D9
D9
D9
–
–
–
D8
D8
D8
–
–
–
D7
D7
D7
–
–
–
20dB
D6
D6
D6
–
–
D5
D5
D5
–
–
–
GN4
GN4
PV3
D4
D4
D4
GN3
GN3
PV2
D3
D3
D3
GN2
GN2
PV1
D2
D2
D2
GN1
GN1
PV0
D1
D1
D1
ICE 1230
GN0
GN0
D0
D0
D0
–
Default
Default
Default
0000h
8008h
8008h
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