STA308A STMicroelectronics, STA308A Datasheet - Page 37

• Manufacturer Part Number: STA308A
• Description: IC AUDIO PROCESSOR DGTL 64-TQFP
• Manufacturer: STMicroelectronics
• Series: DDX™r
• Type: Audio Processorr

Specifications of STA308A

• Mounting Type: Surface Mount
• Package / Case: 64-TQFP, 64-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Applications: -
• Lead Free Status / Rohs Status: Compliant

STA308A
7.2.32
AUTO1 - AutoModes EQ, volume, GC (0x1F)
By setting AMEQ to any setting other than 00 enables AutoMode EQ, biquads 1-5 are not
user programmable. Any coefficient settings for these biquads will be ignored. Also when
AutoMode EQ is used the pre-scale value for channels 1-6 becomes hard-set to -18 dB.
AutoMode downmix setting uses channels 7-8 of Mix#1 engine and therefore these
channels of this function are fixed and not allowed to be user set when in this mode.
Channels 1-6 must be arranged via channel mapping (registers CnIM) if necessary in the
following manner for this operation:
Channel 1: left
Channel 2: right
Channel 3: left surround
Channel 4: right surround
Channel 5: center
Channel 6: LFE.
AMDM
0
1:0
3:2
6:4
7
Bit
Bit
Bit
D7
RW
RW
RW
RW
RW
RW
RW
AMGC2
0
D6
0
0
0
0
RST
RST
RST
AMGC1
0
AMEQ[1:0]
AMV[1:0]
AMGC[2:0]
AMDM
D5
Name
Name
Name
AMGC0
0
D4
Biquad 2-6 mode is:
00: user programmable
01: preset EQ - PEQ bits
10: graphic EQ - xGEQ bits
11: auto volume controlled loudness curve
AutoMode volume mode (MVOL) is:
00: MVOL 0.5 dB 256 steps (standard)
01: MVOL auto curve 30 steps
10: MVOL auto curve 40 steps
11: MVOL auto curve 50 steps
AutoMode gain compression/limiters mode is:
000: user programmable GC
001: AC no clipping
010: AC limited clipping (10%)
011: DRC nighttime listening mode
100: DRC TV commercial/channel AGC
101: AC 5.1 no clipping
110: AC 5.1 limited clipping (10%)
AutoMode 5.1 downmix:
0: normal operation
1: channels 7-8 are 2-channel downmix of channels
1-6
AMV1
0
D3
AMV0
0
Description
Description
Description
D2
AMEQ1
0
D1
AMEQ0
0
Registers
D0
37/63