sta335bwqs STMicroelectronics, sta335bwqs Datasheet - Page 34

• Manufacturer Part Number: sta335bwqs
• Description: 2.1-channel High-efficiency Digital Audio System With Qsound Qhd?
• Manufacturer: STMicroelectronics

Register description
7.3.3
7.4
7.4.1
7.4.2
7.4.3
34/72
Over-current warning detect adjustment bypass
Table 27.
The OCWARN input is used to indicate an over-current warning condition. When OCWARN
is asserted (set to 0), the power control block forces an adjustment to the modulation limit
(default is -3 dB) in an attempt to eliminate the over-current warning condition. Once the
over-current warning volume adjustment is applied, it remains in this state until reset is
applied. The level of adjustment can be changed via the TWOCL (thermal warning/over
current limit) setting which is address 0x37 of the user defined coefficient RAM.
Configuration register D (addr 0x03)
High-pass filter bypass
Table 28.
The STA335BWQS features an internal digital high-pass filter for the purpose of AC
coupling. The purpose of this filter is to prevent DC signals from passing through a DDX
amplifier. DC signals can cause speaker damage. When HPB = 0, this filter is enabled.
De-emphasis
Table 29.
Setting the DEMP bit enables de-emphasis on all channels
DSP bypass
Table 30.
Bit
Bit
Bit
Bit
7
0
1
2
MME
D7
0
R/W
R/W
R/W
R/W
RW
RW
RW
RW
OCRB
HPB
DEMP
DSPB
ZDE
D6
1
RST
RST
RST
RST
1
0
0
0
DRC
D5
0
OCRB
DEMP
Name
Name
Name
Name
DSPB
HPB
BQL
D4
0
0: Over-current warning adjustment enabled
1: Over-current warning adjustment disabled
Setting of one bypasses internal AC coupling digital
high-pass filter
0: No de-emphasis
1: De-emphasis
0: Normal operation
1: Bypass of biquad and bass/treble function
PSL
D3
0
DSPB
Description
Description
Description
Description
D2
0
DEMP
D1
0
STA335BWQS
HPB
D0
0