Product specifications

VT8235 V-Link South Bridge
Revision 1.22 October 24, 2002 -108- Device 17 Function 5 Audio Controller Registers
I/O Offset 62 – Write Channel 0 SGD Format ...............RW
7 Reserved (Do Not Program)...............always write 0
6 Recording FIFO
0 Disable .................................................. default
1 Enable
5-0 Reserved ........................................ always reads 0
I/O Offset 63 – Write Channel 0 Input Select.................RW
7-3 Reserved ........................................ always reads 0
2 Input Source Select
0 Line In (Slot 3, 4).................................. default
1 Mic In (Slot 6)
1-0 Recording Source Select
00 Primary Codex ...................................... default
01 Secondary Codec 01
10 Secondary Codec 10
11 Secondary Codec 11
I/O Offset 67-64 – Wr Channel 0 SGD Table Ptr Base..RW
31-0 SGD Table Pointer Base Address (even addr).... W
Current Pointer Address........................................R
I/O Offset 6B-68 – Write Channel 0 SGD Stop Index ... RW
31-24 SGD Stop Index Setting ...................... default = FFh
23-22 Reserved ........................................always reads 0
21-20 PCM Format
Selects the PCM format used by the controller to
process the incoming sample.
00 8-bit Mono.............................................default
01 8-bit Stereo
10 16-bit Mono
11 16-bit Stereo
19-16 Reserved ........................................................ RW
15-0 Reserved ........................................always reads 0
I/O Offset 6F-6C – Wr Channel 0 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.