參數(shù)資料
型號(hào)： AD1981BLJSTZ-REEL
廠商： ANALOG DEVICES INC
元件分類： 消費(fèi)家電
英文描述： AC 97 SoundMAX Codec
中文描述： SPECIALTY CONSUMER CIRCUIT, PQFP48
封裝： LEAD FREE, MS-026BBC, LQFP-48
文件頁(yè)數(shù)： 15/32頁(yè)
文件大?。?/td> 326K
代理商： AD1981BLJSTZ-REEL
AD1981BL
MONO VOLUME REGISTER
Index 0x06
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 read 1s whenever this bit is
set to 1. Refer to Table 14 for examples.
Rev. A | Page 15 of 32
Reg No.
0x06
All registers are not shown, and bits containing an X are assumed to be reserved.
Table 13.
Bit
Mnemonic
MV [4:0]
Mono Volume Control
Name
Mono Volume
D15
MVM
D14
X
D13
X
D12
X
D11
X
D10
X
D9
X
D8
X
D7
X
D6
X
D5
X
D4
MV4
D3
MV3
D2
MV2
D1
MV1
D0
MV0
Default
0x8000
Function
The least significant bit represents 1.5 dB. This register controls the output from 0 dB to a maximum
attenuation of 46.5 dB.
When this bit is set to 1, the channel is muted.
MVM
Mono Volume Mute
Table 14. Volume Settings for Mono
Control Bits D [4:0] for Mono (0x06)
D15
0
0
0
1
An X is a wild card, and has no effect on the value.
Write
0 0000
0 1111
1 1111
X XXXX
Readback
0 0000
0 1111
1 1111
X XXXX
Function
0 dB Gain
22.5 dB Gain
46.5 dB Gain
∞ dB Gain, Muted
PHONE VOLUME REGISTER
Index 0x0C
Reg No.
0x0C
All registers are not shown, and bits containing an X are assumed to be reserved. Refer to Table 17 for examples.
Table 15.
Bit
Mnemonic
Function
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 are not shown, and bits containing an X are assumed to be reserved. Refer to Table 17 for examples.
Name
Phone Volume
D15
PHM
D14
X
D13
X
D12
X
D11
X
D10
X
D9
X
D8
X
D7
X
D6
X
D5
X
D4
PHV4
D3
PHV3
D2
PHV2
D1
PHV1
D0
PHV0
Default
0x8008
相關(guān)PDF資料
PDF描述
ADSP-1981BL AC 97 SoundMAX Codec
AD1981BL AC ’97 SoundMAX㈢ Codec
AD1981BLJSTZ2 AC ’97 SoundMAX㈢ Codec
AD1981BLJSTZ-REEL2 AC ’97 SoundMAX㈢ Codec
AD1981HD HD Audio SoundMAX Codec
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD1981BLJSTZ-REEL2 制造商:AD 制造商全稱:Analog Devices 功能描述:AC ’97 SoundMAX㈢ Codec
AD1981BWBSTZ 制造商:Analog Devices 功能描述:
AD1981BWBSTZ-REEL 制造商:Analog Devices 功能描述:ANAAD1981BWBSTZ-REEL AC'97 SOUNDMAX CODE
AD1981HD 制造商:AD 制造商全稱:Analog Devices 功能描述:HD Audio SoundMAX Codec
AD1981HDJSTZ 制造商:Analog Devices 功能描述:Audio Codec 2ADC / 2DAC 20-Bit/24-Bit 48-Pin LQFP
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