VT8231 datasheet(121/132 Pages) ETC

121 / 132 page

VT8231

Preliminary Revision 0.8 October 29, 1999

-115-

Function 5 & 6 Registers - AC97 Audio & Modem Codecs

7HFKQRORJLHV ,QF

:H &RQQHFW

I/O Offset 60 – Wr Channel 0 SGD Status...................RWC

7SGD Active (0 = completed or terminated)...........RO

SGD Paused ..........................................................RO

5-4

Reserved

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

SGD Trigger Queued (transaction will restart after

EOL)

..........................................................RO

SGD Stopped ........................................................RO

1SGD EOL (clear interrupt if Rx62[1] is set) ..... RWC

0SGD Flag (clear interrupt if Rx62[0] is set) ......RWC

I/O Offset 61 – Wr Channel 0 SGD Control ...................RW

SGD Trigger ........................... WO (always reads 0)

No effect

Trigger SGD Operation

SGD Terminate ...................... WO (always reads 0)

No effect

Terminate SGD Operation

5-4

Reserved

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

3SGD Pause

Release SGD pause and resume the transfer

from the paused line

Pause SGD read operation (SGD pointer stays

at the current address)

3-2

Reserved

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

I/O Offset 62 – Wr Channel 0 SGD Format....................RW

Auto Restart

Stop SGD Operation at EOL

Restart SGD Operation at EOL

Recording FIFO

Disable ...................................................default

1Enable

PCM 8/16 Format (0=8bit, 1=16bit)

PCM Mono/Stereo Format (0=Mono, Stereo)

3-2

Recording Source

00 Primary Codec

01 Secondary Codec 01

10 Secondary Codec 10

11 -reserved-

Interrupt on EOL @ End of Block

Disable ...................................................default

1Enable

Interrupt on FLAG @ End-of-Blk

Disable ...................................................default

1Enable

I/O Offset 67-64 – Wr Channel 0 SGD Table Pointer....RW

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

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

I/O Offset 6F-6C – Wr Channel 0 SGD Current Count .RO

31-24 Current SGD Index

23-0 Current SGD Count

I/O Offset 70 – Wr Channel 1 SGD Status .................. RWC

7SGD Active (0 = completed or terminated) .......... RO

SGD Paused ......................................................... RO

5-4

Reserved

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

SGD Trigger Queued (transaction will restart after

EOL)

......................................................... RO

SGD Stopped........................................................ RO

1SGD EOL (clear interrupt if Rx62[1] is set)..... RWC

0SGD Flag (clear interrupt if Rx62[0] is set) ..... RWC

I/O Offset 71 – Wr Channel 1 SGD Control................... RW

SGD Trigger............................WO (always reads 0)

No effect

Trigger SGD Operation

SGD Terminate.......................WO (always reads 0)

No effect

Terminate SGD Operation

5-4

Reserved

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

3SGD Pause

Release SGD pause and resume the transfer

from the paused line

Pause SGD read operation (SGD pointer stays

at the current address)

3-2

Reserved

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

I/O Offset 72 – Wr Channel 1 SGD Format ................... RW

Auto Restart

Stop SGD Operation at EOL

Restart SGD Operation at EOL

Recording FIFO

Disable................................................... default

1Enable

PCM 8/16 Format (0=8bit, 1=16bit)

PCM Mono/Stereo Format (0=Mono, Stereo)

3-2

Recording Source

00 Primary Codec

01 Secondary Codec 01

10 Secondary Codec 10

11 -reserved-

Interrupt on EOL @ End of Block

Disable................................................... default

1Enable

Interrupt on FLAG @ End-of-Blk

Disable................................................... default

1Enable

I/O Offset 77-74 – Wr Channel 1 SGD Table Pointer ... RW

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

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

I/O Offset 7F-7C – Wr Channel 1 SGD Current Count. RO

31-24 Current SGD Index

23-0 Current SGD Count

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