VT8235 datasheet(112/145 Pages) VIA

112 / 145 page

VT8235 V-Link South Bridge

Revision 1.22 October 24, 2002

-106-

Device 17 Function 5 Audio Controller Registers

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I/O Offset 42 – Multichannel SGD Format .....................RW

PCM Format

Selects the PCM format used by the controller to

process the incoming sample.

8-bit

.................................................... default

16-bit

6-4

Number of Channels Supported

000 -reserved-............................................... default

001 One Channel

010 Two Channels

011 Three Channels

100 Four Channels

101 Five Channels

110 Six Channels

111 -reserved-

3-0

Reserved

........................................ always reads 0

I/O Offset 43 – Multichannel Scratch Register...............RW

7-0

No Hardware Function

........................ default = 00h

I/O Offset 47-44 – Multichannel SGD Table Ptr Base ...RW

31-0 SGD Table Pointer Base Address (even addr).... W

Current Pointer Address ........................................R

I/O Offset 4B-48 – Multichannel SGD Slot Select.......... RW

31-24 SGD Stop Index Setting

...................... default = FFh

23-20 Data Select of Slot 9

No data assigned to slot 9 ...................... default

st data in sample assigned to slot 9

nd data in sample assigned to slot 9

rd data in sample assigned to slot 9

th data in sample assigned to slot 9

7-F -reserved

19-16 Data Select of Slot 6

15-12 Data Select of Slot 8

11-8 Data Select of Slot 7

7-4

Data Select of Slot 4

3-0

Data Select of Slot 3

I/O Offset 4F-4C – Multichannel SGD Current Count .. RO

31-24 Current SGD Index

This field reports the index the SGD engine is

currently processing.

23-0 Current SGD Count

This field reports the count remaining in the current

entry being processed. For example, if 10 bytes of a

30-byte count have been transferred, this field would

read 20 to indicate 20 bytes remaining.

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