參數(shù)資料
型號(hào)： LM4560
廠商： National Semiconductor Corporation
英文描述： Advanced PCI Audio Accelerator
中文描述： 先進(jìn)的PCI音頻加速器
文件頁(yè)數(shù)： 48/54頁(yè)
文件大小： 380K
代理商： LM4560
4.0 Functional Description
(Continued)
Read/Write
Bit 7..3 32 level external line left volume
Bit 2..0 reserved
0
mute
31
0 dB (maximum volume)
MX39 External Line Right Volume
Default 00h
Read/Write
Bit 7..3 32 level external line right volume
Bit 2..0 reserved
0
mute
31
0 dB (maximum volume)
MX3A Microphone Volume
Default 00h
Read/Write
Bit 7..3 32 level microphone volume
Bit 2..0 reserved
0
mute
31
0 dB (maximum volume)
MX3B PC Speaker/Mono Input Volume
Default 00h
Read/Write
Bit 7,6
4 level PC Speaker/Mono input volume
Bit 5..0 reserved
0
mute
3
0 dB (maximum volume)
MX3C Output Mixer Control
Default 1Fh
Read/Write
Bit 7..5 reserved
Bit 4
external line left enable
Bit 3
external line right enable
Bit 2
CD-Audio left enable
Bit 1
CD-Audio right enable
Bit 0
microphone enable
0
mute
1
enable audio output
MX3D Input Mixer Left Control
Default 15h
Read/Write
Bit 7 reserved
Bit 6 music left enable
Bit 5 dummy read/write bit
Bit 4 external line left enable
Bit 3 dummy read/write bit
Bit 2 CD-Audio left enable
Bit 1 dummy read/write bit
Bit 0 microphone enable
0
mute
1
enable audio input
MX3E Input Mixer Right Control
Default 0Bh
Read/Write
Bit 7 reserved
Bit 6 dummy read/write bit
Bit 5 music right enable
Bit 4 dummy read/write bit
Bit 3 external line right enable
Bit 2 dummy read/write bit
Bit 1 CD-Audio right enable
Bit 0 microphone enable
0
mute
1
enable audio input
MX3F Input Left Mixer Gain
Default 00h
Read/Write
Bit 7,6
Bit 5..0
Bit 7
0
0
1
1
MX40 Input Right Mixer Gain
Default 00h
Read/Write
Bit 7,6
input right mixer gain control
Bit 5..0 reserved
input left mixer gain control
reserved
Bit 6
0
1
0
1
gain = 1
gain = 2
gain = 4
gain = 8
Bit 7
0
0
1
1
MX41 Output Left Mixer Gain
Default 00h
Read/Write
Bit 7,6
4 level output left mixer gain
Bit 5..0 reserved
Bit 6
0
1
0
1
gain = 1
gain = 2
gain = 4
gain = 8
Bit 7
0
0
1
1
MX42 Output Right Mixer Gain
Default 00h
Read/Write
Bit 7,6
4 level output right mixer gain
Bit 5..0 reserved
Bit 6
0
1
0
1
gain = 1
gain = 2
gain = 4
gain = 8
Bit 7
0
0
1
1
MX43 Microphone Automatic Gain Control (AGC)
Default 00h
Bit 6
0
1
0
1
gain = 1
gain = 2
gain = 4
gain = 8
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