AD1887 데이터 시트보기 (PDF) - Analog Devices
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AD1887 Datasheet PDF : 16 Pages
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AD1887
Reset (Index 00h)
Reg
Num
Name
00h Reset
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Default
X SE4 SE3 SE2 SE1 SE0 ID9 ID8 ID7 ID6 ID5 ID4 ID3 ID2 ID1 ID0 0010h
Note: Writing any value to this register performs a register reset, which causes all registers to revert to their default values (except
74h, which forces the serial configuration). Reading this register returns the ID code of the part and a code for the type of 3D Stereo
Enhancement.
ID[9:0]
Identify Capability. The ID decodes the capabilities of AD1887 based on the following:
SE[4:0]
Bit = 1 Function
AD1887*
ID0
Dedicated Mic PCM in Channel
0
ID1
Modem Line Codec Support
0
ID2
Bass and Treble Control
0
ID3
Simulated Stereo (Mono to Stereo) 0
ID4
Headphone Out Support
1
ID5
Loudness (Bass Boost) Support
0
ID6
18-Bit DAC Resolution
0
ID7
20-Bit DAC Resolution
0
ID8
18-Bit ADC Resolution
0
ID9
20-Bit ADC Resolution
0
*The AD1887 contains none of the optional features identified by these bits.
Stereo Enhancement. The 3D stereo enhancement identifies the Analog Devices 3D stereo enhancement.
Headphones Volume Registers (Index 04h)
Reg
Num
Name
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Default
04h
Headphones
Volume
HPM
X
LHV5 LHV4 LHV3 LHV2 LHV1 LHV0 X X RHV5 RHV4 RHV3 RHV2 RHV1 RHV0 8000h
RHV[5:0]
LHV[5:0]
HPM
Right Headphone Volume Control. The least significant bit represents 1.5 dB. This register controls the output
from +6 dB to a maximum attenuation of –88.5 dB.
Left Headphone Volume Control. The least significant bit represents 1.5 dB. This register controls the output
from +6 dB to a maximum attenuation of –88.5 dB.
Headphones Volume Mute. When this bit is set to “1,” the channel is muted.
HPM
0
0
0
1
xHV5 . . . xHV0
00 0000
01 1111
11 1111
xx xxxx
Function
6 dB Gain
–40.5 dB Attenuation
–88.5 dB Attenuation
–∞ dB Attenuation
REV. 0
–9–
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