AD1888JCP 데이터 시트보기 (PDF) - Analog Devices
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AD1888JCP Datasheet PDF : 32 Pages
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AD1888
Phone_in Volume Register (Index 0Ch)
Reg
No. Name
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Default
0Ch Phone_in Volume PHM X X X X X X X X X X PHV4 PHV3 PHV2 PHV1 PHV0 8008h
All registers not shown and bits containing an X are assumed to be reserved. Refer to Table III for examples.
PHV[4:0]
PHM
Phone Volume. Allows setting the Phone Volume attenuator in 32 volume levels with 31 steps of 1.5 dB each. The
LSB represents 1.5 dB, and the gain range is +12 dB to –34.5 dB. The default value is 0 dB, with the mute bit enabled.
Phone Mute. When this bit is set to 1, the Phone channel is muted.
MIC Volume Register (Index 0Eh)
Reg
No. Name
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4
D3
D2
D1 D0 Default
0Eh MIC Volume MCM X X X X X X X X M20 X MCV4 MCV3 MCV2 MCV1 MCV0 8008h
All registers not shown and bits containing an X are assumed to be reserved. Refer to Table III for examples.
MCV[4:0]
M20
MCM
MIC Volume Gain. Allows setting the MIC Volume attenuator in 32 volume levels. The LSB represents 1.5 dB,
and the gain range is +12 dB to –34.5 dB. The default value is 0 dB, with mute enabled.
MIC Gain Boost. This bit allows setting additional MIC gain to increase the microphone sensitivity. The nominal
gain boost by default is 20 dB; however, Bits D0 and D1 (MBG[1:0]) on the miscellaneous control bits register
(76h) allow changing the gain boost to 10 dB or 30 dB, if necessary.
0 = Disabled; Gain = 0 dB
1 = Enabled; Default Gain = 20 dB (see Register 76h, Bits D0, D1)
MIC Mute. When this bit is set to 1, the channel is muted.
Table III. Volume Settings for Phone and MIC
Control Bits D[4:0]
Phone (0Ch) and MIC (0Eh)
D15
WRITE
READBACK
0
0 0000
0
0 1000
0
1 1111
1
x xxxx
0 0000
0 1000
1 1111
x xxxx
x in the above table is a wild card, and has no effect on the value.
Function
12 dB Gain
0 dB Gain
–34.5 dB Gain
–ϱ dB Gain, Muted
–12–
REV. 0
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