STA310 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'STA310' PDF : 90 Pages View PDF
STA310
CHAN_IDX
Channel Index
765432
1
0
Reserved
CHAN_IDX
Address: 0x67
Type: R/W
Software Reset: 4
Hardware Reset: UND
Description:
This register identifies the pair of channels and the
type of access:
Bitfield value Channel pair Access comment
CHAN_I
DX
0 Left and Right write
1 Center and write
Subwoofer
2 Left surround write
and right
surround
3 reserved
reserved
4 no pair
selected
none
Indicates
that volume
can be read
or written
5 Left and Right read
6 Center and read
Subwoofer
7 Left surround read
and right
surround
s To read a volume, the register CHAN_IDX
must be set to the appropriate value. The DSP
indicates that the attenuation is readable
through registers VOLUME0 and
VOLUME1 by changing automatically the
CHAN_IDX to value 4.
s To write a volume, the attenuation of the pair of
channel should be written in VOLUME0 and
VOLUME1 registers. Then the CHAN_IDX
register is written to the appropriate value. The
attenuation is updated on the next audio block
and CHAN_IDX value is automatically
changed to 4.
9.16 Dolby Digital configuration registers
AC3_DECODE_LFE
Decode LFE
7654321
0
Address: 0x68
Type: R/W
Software Reset: NC
Hardware Reset: UND
Description:
When this register is set to 1, the device decodes
LFE channel (if present).
AC3_COMP_MOD
Compression mode
7
6
5
4
3
2
10
Address + 0x69
Type: R/W
Software Reset: NC
Hardware Reset: UND
Description:
The value of this register defines the compression
mode. In custom A mode, the dialog normalization
function is not done by the audio decoder, it has to be
done by an external analog part. In all other modes
the normalization is done by audio decoder.
Value
0
1
2
3
Meaning
Custom A (Analog)
Custom D (Digital)
Line Out
RF Mode
63/90
Share Link: 
