CMI-8738 Datasheet, PDF (12/28 Pages) C-Media Electronics – C3DX PCI-Based HRTF 3D Extension Positional Audio Chip

28
27-26
25-24
23-21
20
retry
19
18
17
16
15-0
Ver. 1.2
CMI-8738/PCI-SX AUDIO Specification
VSBSEL[1:0]
FMSEL[1:0]
Reserved
SetRetry
11 Base address : 300h
Reserved
The Base Address Select for SB16 access.
00 Base address: 220h
01 Base address: 240h
10 Base address: 260h
11 Base address: 280h
The Base Address Select for FM access.
00 Base address : 388h
01 Base address : 3C8h
10 Base address : 3E0h
11 Base address : 3E8h
Mode of wait state . 0:legacy I/O wait (default) 1:legacy I/O BUS
C_EEACCESS Direct programming EEPROM interface Registers.
C_EECS
C_EEDI46
C_EECK46
Reserved
Micellaneous Control Register
Address 18H
Bit(s) R/W
Name
Description
31
PWD
Power Down Mode enabled..
30
RESET
Reset Bus Master/DSP Engine.
29-28
SFIL[1:0]
Four level of filter control at the front end DAC..
27
TX/VX
Which motherboard to work with
0 VX chip sets.
1 TX chip sets.
26
N4SPK3D
Hardware copy front channel to rear channel
25-24
Reserved
23
ENDBDAC Default low, High will enable Double DAC structure.
22
XCHGDAC Default low,
0 CH0 > Front SPKR, CH1 > Back SPKR.
1 CH0 > Back SPKR, CH1 > Front SPKR.
21-20
Reserved
19
FM_EN
Legacy FM enabled.
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