參數(shù)資料
型號： AD1817A
廠商： Analog Devices, Inc.
英文描述： Multimedia Audio Subsystem For Concurrently Processing Multiple Digital Streams Of 16-bit Stereo Audio In Personal Computers.(可處理個人電腦的16位立體聲多重數(shù)字流的多媒體聲音子系統(tǒng))
中文描述： 多媒體音頻子系統(tǒng)，為同時處理中的16多個數(shù)字信息流，在個人電腦。位立體聲音頻（可處理個人電腦的16位立體聲多重數(shù)字流的多媒體聲音子系統(tǒng)）
文件頁數(shù)： 29/44頁
文件大小： 269K
代理商： AD1817A
AD1817A
–29–
REV. 0
4
3
2
1
RES
TECHNICAL
RMVA [4:0] Right Master Volume Attenuation. T he LSB represents –1.5 dB, 00000 = 0 dB and the range is 0 dB to
–46.5 dB. T his register is added with the Hardware Volume Button Modifier value to produce the final DAC Master
Volume attenuation level. See Hardware Volume Button Modifier Register description for more details.
RMVM
Right Master Volume Mute. 0 = Unmuted, 1 = Muted.
LMVA [4:0] Left Master Volume Attenuation. T he LSB represents –1.5 dB, 00000 = 0 dB and the range is 0 dB to
–46.5 dB. T his register is added with the Hardware Volume Button Modifier value to produce the final DAC Master
Volume attenuation level. See Hardware Volume Button Modifier Register description for more details.
LMVM
Left Master Volume Mute. 0 = Unmuted, 1 = Muted.
[15] C D GAIN/AT T E NUAT ION
7
6
L CDM
RES
DE F AUL T = [0x8888]
2
RCDA [4:0]
5
4
3
2
1
0
7
6
5
4
3
1
0
LCDA [4:0]
RCDM
RES
RCDA [4:0]
RCDM
LCDA [4:0]
LCDM
Right CD Attenuation. T he LSB represents –1.5 dB, 00000 = +12 dB and the range is +12 dB to –34.5 dB.
Right CD Mute. 0 = Unmuted, 1 = Muted.
Left CD Attenuation. T he LSB represents –1.5 dB, 00000 = +12 dB and the range is +12 dB to –34.5 dB.
Left CD Mute. 0 = Unmuted, 1 = Muted.
[16] SY NT H GAIN/AT T E NUAT ION
7
6
5
LSYM
RES
DE F AUL T = [0x8888]
2
RSYA [4:0]
4
3
2
1
0
7
6
5
4
3
1
0
LSYA [4:0]
RSYM
RES
RSYA [4:0]
RSYM
LSYA [4:0]
LSYM
Right SYNT H Attenuation. T he LSB represents –1.5 dB, 00000 = +12 dB and the range is +12 dB to –34.5 dB.
Right SYNT H Mute. 0 = Unmuted, 1 = Muted.
Left SYNT H Attenuation. T he LSB represents –1.5 dB, 00000 = +12 dB and the range is +12 dB to –34.5 dB.
Left SYNT H Mute. 0 = Unmuted, 1 = Muted.
[17] RE SE RVE D
7
DE F AUL T = [0xX X X X ]
2
6
5
4
3
2
1
0
7
6
5
4
3
1
0
RESERVED
RESERVED
[18] RE SE RVE D
7
DE F AUL T = [0x8888]
2
1
6
5
7
6
5
4
3
0
RES
[19] MIC /PHONE
_
IN GAIN/AT T E NUAT ION
7
6
5
MCM
M20
RES
DE FAULT = [0xC 888]
2
PIA [3:0]
4
3
2
1
0
7
6
5
4
3
1
0
MCA [4:0]
PIM
RES
RES
PIA [3:0]
PIM
MCA [4:0]
M20
MCM
PHONE_IN Attenuation. T he LSB represents –3 dB, 0000 = 0 dB and the range is 0 dB to –45 dB.
PHONE_IN Mute.
Microphone Attenuation. T he LSB represents –1.5 dB, 00000 = +12 dB and the range is
±
12 dB to –34.5 dB.
Microphone 20 dB Gain. T he M20-bit enables the Microphone +20 dB gain stage.
Microphone Mute.
[20] ADC SOURC E SE L E C T AND ADC PGA
7
6
5
LAGC
LAS [2:0]
DE F AUL T = [0x0000]
2
1
RAG [3:0]
4
3
2
1
0
7
6
5
4
3
0
LAG [3:0]
RAGC
RAS [2:0]
RAG [3:0]
Right ADC Gain Control ADC source select and Gain. For Gain, LSB represents +1.5 dB, 0000 = 0 dB
and the range is 0 dB to +22.5 dB.
Right Automatic Gain Control (AGC) Enable, 0 = Enabled, 1 = Disabled.
Left ADC Gain Control ADC source select and Gain. For Gain, LSB represents +1.5 dB, 0000 = 0 dB
and the range is 0 dB to +22.5 dB.
RAGC
LAG [3:0]
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