CMI-8738 View Datasheet(PDF) - C-Media Electronics

Part Name

Description

Manufacturer

CMI-8738

C3DX PCI-Based HRTF 3D Extension Positional Audio Chip

C-Media Electronics 

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

C-MEDIA ELECTRONICS INC. Tel:886-2-87731100 Fax:886-2-87732211 URL : www.cmedia.com.tw

Products and company names mentioned here are the trademarks of their respective owners.

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