STA326 STMicroelectronics, STA326 Datasheet - Page 34

• Manufacturer Part Number: STA326
• Description: DIG AUDIO SYSTEM, 2-CH, 36POWERSSOP
• Manufacturer: STMicroelectronics

Specifications of STA326

• Svhc: No SVHC (15-Dec-2010)
• No. Of Pins: 36
• Operating Temperature Range: -20°C To +85°C
• Supply Voltage Max: 36V
• Supply Voltage Min: 10V
• Termination T: RoHS Compliant
• Package / Case: PowerSO
• Interface: I2C
• Interface Type: I2C
• Rohs Compliant: Yes

Register description
6.8
6.8.1
34/57
Automode registers
Automodes EQ, volume, GC (addr 0x0B)
Table 48.
By setting AMEQ to any setting other than 00 enables Automode EQ where biquads 1-4 are
not user programmable. Any coefficient settings for these biquads are ignored. Also when
Automode EQ is used the prescale value for channels 1-2 becomes hard-set to -18 dB.
Table 49.
Table 50.
Table 51.
00
01
10
11
00
01
10
11
00
01
10
11
7
Bit
AMPS
D7
1
RW
R/W
AMGC[1:0]
AMEQ[1,0]
AMV[1,0]
Automode EQ
Automode volume
Automode gain compression/limiters
AMPS - Automode auto prescale
Reserved
1
D6
RST
0
AMPS
AMGC1
Name
D5
0
Doc ID 11531 Rev 3
User programmable
Preset EQ - PEQ bits
Auto volume controlled loudness curve
Not used
MVOL 0.5 dB 256 steps (standard)
MVOL auto curve 30 steps
MVOL auto curve 40 steps
MVOL auto curve 50 steps
User programmable GC
AC no clipping
AC limited clipping (10%)
DRC nighttime listening mode
AMGC0
Automode prescale
0: -18 dB used for prescale when AMEQ neq 00
1: user defined prescale when AMEQ neq 00
D4
0
AMV1
D3
0
Mode (biquad 1-4)
Mode (MVOL)
Mode
Description
AMV0
D2
0
AMEQ1
D1
0
AMEQ0
STA326
D0
0