參數(shù)資料
型號(hào)： AD1981BL
廠商： Analog Devices, Inc.
元件分類(lèi)： Codec
英文描述： AC ’97 SoundMAX㈢ Codec
中文描述： ㈢交流\u0026#39;97 SoundMAX編解碼器
文件頁(yè)數(shù)： 12/28頁(yè)
文件大小： 215K
代理商： AD1981BL
REV. 0
AD1981BL
–12–
Mono Volume Register (Index 06h)
Reg
No.
Name
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Default
06h
Mono Volume
MVM
X
X
X
X
X
X
X
X
X
X
MV4
MV3
MV2
MV1
MV0
8000h
All registers not shown and bits containing an X are assumed to be reserved.
Refer to Table II for examples. This register controls the mono output volume and mute bit. The volume register contains five bits,
generating 32 volume levels with 31 steps of 1.5 dB each. Because AC ’97 defines 6-bit volume registers, to maintain compatibility,
whenever the D5 bit is set to 1, their respective lower five volume bits are automatically set to 1 by the codec logic. On readback, all
lower five bits will read 1s whenever this bit is set to 1.
MV[4:0]
Mono Volume Control. The least significant bit represents 1.5 dB. This register controls the output from 0 dB to a
maximum attenuation of 46.5 dB.
MVM
Mono Volume Mute. When this bit is set to 1, the channel is muted.
Table II. Volume Settings for Mono
Control Bits D[4:0] for Mono (06h)
WRITE
D15
READBACK
Function
0
0
0
1
0000
0 1111
1 1111
x xxxx
0 0000
0 1111
1 1111
x xxxx
0 dB Gain
–22.5 dB Gain
–46.5 dB Gain
–
dB Gain, Muted
x in the above table is a wild card and has no effect on the value.
Phone 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 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]
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.
PHM
Phone Mute. When this bit is set to 1, the phone channel is muted.
All registers not shown and bits containing an X are assumed to be reserved. Refer to Table III for examples.
MCV[4:0]
MIC Volume Gain. 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.
M20
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)
MCM
MIC Mute. When this bit is set to 1, the MIC 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.
相關(guān)PDF資料
PDF描述
AD1981BLJSTZ2 AC ’97 SoundMAX㈢ Codec
AD1981BLJSTZ-REEL2 AC ’97 SoundMAX㈢ Codec
AD1981HD HD Audio SoundMAX Codec
AD1981HDJSTZ HD Audio SoundMAX Codec
AD1981HDJSTZ-REEL HD Audio SoundMAX Codec
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD1981BLJST 制造商:Analog Devices 功能描述:
AD1981BLJST-REEL 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:AC ’97 SoundMAX㈢ Codec
AD1981BLJSTZ 制造商:Analog Devices 功能描述:Audio Codec 4ADC / 2DAC 20-Bit 48-Pin LQFP 制造商:Analog Devices 功能描述:IC AUDIO CODEC
AD1981BLJSTZ2 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:AC ’97 SoundMAX㈢ Codec
AD1981BLJSTZ-REEL 制造商:Analog Devices 功能描述:Audio Codec 4ADC / 2DAC 20-Bit 48-Pin LQFP T/R
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*