CMI-8738 Datasheet, PDF (15/28 Pages) C-Media Electronics – C3DX PCI-Based HRTF 3D Extension Positional Audio Chip

Ver. 1.2
CMI-8738/PCI-SX AUDIO Specification
3-1
0
Bit(s)
7-4
3-0
R/W
VADMIC[2:0] Recording MIC volume control
MICGAINZ MIC gain control,default high disable
Address 26H
Name
Description
VAUXL[3:0] L-AUX volume control
VAUXR[3:0] R-AUX volume control
Address 27H
Bit(s) R/W Name
Description
0
DMAUTO
SB16 Low/High DMA Auto detect enabled ,When high.
1
Reserved
2
XGPBIO
general purpose bi-direction pin, when high output tri-state
(default LOW)
3
Reserved
4
Reserved
5
XGPO1
general purpose output pin 1,this pin shared with XSPDIFO pin,
and enabled when index reg. F0_bit 0 programmed high.
6-7
Reserved
Mup401 PCI Port
FM PCI Port
Index address 40-4FH
Index address 50-5FH
Extension Index Register (access from SB compatible mixer port)
Index address F0H
Bit(s) R/W Name
Description
7-5
VPHONE[2:0] Phone volume control
4
VPHOM
Phone mute control
3
VSPKM
PC-Speaker mute control,default high unmute
2
RLOOPREN Recording R-channel enable
1
RLOOPLEN Recording L-channel enable
0
VADMIC3
Micphone record boost, default low disable, high enable.
Index address F8-FFH
These 8 registers is used to programming M/N conunter by clock generator
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