STA310 STMicroelectronics, STA310 Datasheet - Page 65

• Manufacturer Part Number: STA310
• Description: IC AUDIO DECODER 6+2CH 80-TQFP
• Manufacturer: STMicroelectronics
• Type: Audio Decoderr

Specifications of STA310

• Applications: HDTV, Players, Receivers, Set-Top Boxes
• Voltage - Supply, Analog: 2.5V
• Voltage - Supply, Digital: 2.5V
• Mounting Type: Surface Mount
• Package / Case: 80-TQFP, 80-VQFP
• Audio Codec Type: MP3 Decoder
• No. Of Dacs: 3
• No. Of Input Channels: 2
• No. Of Output Channels: 6
• Adc / Dac Resolution: 32bit
• Sampling Rate: 192kHz
• Interface Type: I2C, Serial, Parallel
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-8856; STA310

coming vocal channels, V1 and V2.
An additional mode is added ( AC3_KARAMODE =
3) to allow multi-channel reproduction. In this case,
the downmix specified by the
AC3_DUALMODE registers is applied.
The following table summaries the different modes:
Left = Output Channel,
Right = Output Channel, L, R, M, V1, V2 = Input
Channels (coded in Dolby Digital karaoke bitstream),
clev = Center Mix Level (value provided in the bit-
stream),
slev = Surround Mix Level (value provided in the bit-
stream). For further information ref. to annex C of
ATSC standard “Digital Audio Compression (AC-3)”.
AC3_DUALMODE
Dual downmix
Address : 0x6E
Type: R/W
Software Reset: NC
Hardware Reset: UND
Description
This register allows additional downmix to be set
Value
7
0
1
2
3
4
5
6
7
Multicha
Capable Do not reproduce V1, V2: Left = L +
Aware Left = L + clev*M + slev*V1, Right = R +
Mode
nnel
6
clev*M + slev*V2
Not used
Not used
Consider bitstream as multi-channel:
Perform downmix according to
DOWNMIX and DUALMODE registers
clev*M, Right = R + clev*M
Reproduction V1 only: Left = L + clev*M
+ 0.707*V1, Right = R + clev*M +
0.707V1
Reproduction V2 only: Left = L + clev*M
+ 0.707*V2, Right = R + clev*M +
0.707V2
Reproduction V1, V2: Left = L + clev*M
+ V1, Right = R + clev*M + V2
5
4
Comment
3
AC3_DOWNMIX and
2
1
0
when in 2/0 output mode or when receiving a “Dual
mode” incoming bitstream (example: A disk with 2 dif-
ferent languages on channel 1 and channel 2). In the
following table, channel 1 and 2 represent the output
channels
AC3_DOWNMIX.
This
AC3_DOWNMIX = 2 and
AC3_DOWNMIX
Downmix
Address: 0x6F
Type: R/W
Software Reset: NC
Hardware Reset: UND
Description:.
Note: in notation, 3/2 represents 3 front speakers and
2 surround speakers.
AC3_STATUS0
Value
Value
7
0
1
2
3
0
1
2
3
4
5
6
7
register
Output as Stereo
Output Channel 1 on both output L/R
Output Channel 2 on both output L/R
Mix Channel 1 and 2 to monophonic and
output on both L/R
6
2/0 Dolby Surround (LT, RT)
1/0 (C)
2/0 (L, R)
3/0 (L, C, R)
3/1 (L, C, R, S)
2/2 (L, R, LS, RS - Dolby Phantom Mode
3/2 (L, C, R, L
(L, R, S)
after
5
enables
downmix
4
S
Description
, R
Description
Mono
S
AC3_DUALMODE = 3.
3
)
performed
downmix
2
1
STA310
when
65/90
with
0