Product specifications

VT8237R Data Sheet
Revision 2.06 December 15, 2004 -138- Device 17 Function 5 Audio Controller Registers
I/O Offset 42 – Multichannel SGD Format.....................RW
7 PCM Format
Selects the PCM format used by the controller to
process the incoming sample.
0 8-bit .....................................................default
1 16-bit
6-4 Number of Channels Supported
001 One Channel...........................................default
010 Two Channels
100 Four Channels
110 Six Channels
All the other values are invalid
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
23-0 Reserved ........................................always reads 0
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.