LSI Logic Confidential
12-8
Audio Interface
Copyright © 2001, 2002 by LSI Logic Corporation. All rights reserved.
to allow software polling of completion. Clearing this bit is
ignored (use the stop bit instead).
12.3 Audio Output Control Register
The Audio Output Control Register is used to control a variety of
features, as described below. A read-modify-write cycle must be used
when accessing this register.
Audio Output Control Register
Memory Space Address: 0x50000.
V958
23
Value of V bit during IEC958 transfer.
R958
[22:21]
Specifies the rate of I958 sample output relative to audio
output stream 1 samples as shown in the table below.
This allows the I958 output to run at a subsampled rate
(typically 44.1 kHz or 48 kHz) of the main audio output
as required in DVD-Audio. Programming note: This field
Set/Clear
Description
Set by software
Queue up a new transfer (max of two
outstanding).
Cleared by
hardware
No outstanding transfers. Last of transfer
data has left AIO.
31
23
22
21
20
19
18
17
16
Reserved
V958
R958
Res
E958
OBclk
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
OBclk I9S32
I958
FrForm
OTim OS32 OClkr
ChCnt
AudInt
Res
OQF
0
GoO