STA326 STMicroelectronics, STA326 Datasheet - Page 26

• 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
6.4
26/57
Configuration register D (addr 0x03)
Table 25.
The STA326 features an internal digital high-pass filter for the purpose of DC Blocking. The
purpose of this filter is to prevent DC signals from passing through a DDX
signals can cause speaker damage.
Table 26.
By setting this bit to 1, the de-emphasis will be implemented on all channels. DSPB (DSP
Bypass, Bit D2, CFA) bit must be set to 0 for de-emphasis to function.
Table 27.
Setting the DSPB bit bypasses all the EQ and mixing functionality of the STA326 core.
Table 28.
Postscale functionality is an attenuation placed after the volume control and directly before
the conversion to PWM. Postscale can also be used to limit the maximum modulation index
and therefore the peak current. A setting of 1 in the PSL register will result in the use of the
value stored in channel 1 postscale for all three internal channels.
0
1
2
3
Bit
Bit
Bit
Bit
MME
D7
0
RW
RW
RW
RW
R/W
R/W
R/W
R/W
High-pass filter bypass
De-emphasis
DSP bypass
Postscale link
ZDE
0
0
0
0
D6
1
RST
RST
RST
RST
HPB
DEMP
DSPB
PSL
DRC
D5
Name
0
Name
Name
Name
Doc ID 11531 Rev 3
BQL
D4
High-pass filter bypass bit.
0: AC coupling high pass filter enabled
1: AC coupling high pass filter disabled
0
De-emphasis:
0: no de-emphasis
1: de-emphasis
DSP bypass bit:
0: normal Operation
1: bypass of EQ and mixing functionality
Postscale link:
0: each channel uses individual postscale value
1: each channel uses channel 1 postscale value
PSL
D3
0
Description
DSPB
Description
Description
Description
D2
0
DEMP
D1
®
0
amplifier. DC
STA326
HPB
D0
0