STA310 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'STA310' PDF : 90 Pages View PDF
STA310
AC3_HDR
High dynamic range
7
6
5
4
3
2
1
0
level signals amplification is maximum.
A value of zero disables the low-level amplification.
This word is ignored if the compression mode is set
to RF mode.
Address: 0x6A
Type: R/W
Software Reset: NC
Hardware Reset: UND
Description:
This register corresponds to the Dynamic range
scale factor for high level signals, also called cut fac-
tor in the Dolby specifications.
HDR = 255 * Cut Factor (in decimal), where the cut
factor is a fractional number between 0 and 1. It is
used to scale the dynamic range control word for
high-level signals that would otherwise tend to be re-
duced.
When HDR = 0xff (cut factor = 1.0), the high level sig-
nals reduction is the one given in the stream.
A value of zero disables the high-level compression.
This word is ignored if the compression mode is set
to RF mode.
AC3_LDR
Low dynamic range
7
6
5
4
3
2
1
0
Address : 0x6B
Type: R/W
Software Reset: NC
Hardware Reset: UND
Description:
This register corresponds to the Dynamic range
scale factor for low level signals, also called boost
factor in the Dolby specifications.
LDR = 255 * BoostFactor (in decimal), where the
boost factor is a fractional number between 0 and
1.0. The boost factor scales the dynamic range con-
trol-word for low-level signals that would otherwise
tend to be amplified.
When LDR = 0xff (boost factor = 1.0), and the low
AC3_RPC
Repeat count
7
6
5
4
3
2
1
0
Address + 0x6C
Type: R/W
Software Reset: NC
Hardware Reset: UND
Description:
When a CRC error is detected, previous blocks can
be repeated or muted.
This register specifies the number of audio blocks to
repeat before muting. If this is zero, then blocks are
muted until the next frame is decoded
AC3_KARAMODE
Karaoke downmix
7
6
5
4
3
2
1
0
AudioBaseAddress + 0x6D
Type: R/W
Software Reset: NC
Hardware Reset: UND
Description:
Downmix mode when a karaoke bit stream is re-
ceived.
A Karaoke bitstream can be composed of 5 chan-
nels, which are: L (left), R (right), M (Music), V1(Vocal
1), V2 (Vocal 2).
There are two major modes when receiving a
Karaoke bitstream: aware and capable.
When in 'aware' mode ( KARAMODE = 0), a pre-
defined downmix is applied on all incoming channels.
When in 'capable' mode ( KARAMODE = 4, 5, 6, 7),
the user can choose to reproduce or not the two in-
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