sta559bwqs STMicroelectronics, sta559bwqs Datasheet - Page 34

• Manufacturer Part Number: sta559bwqs
• Description: 5-v, 2-a, 2.1-channel High-efficiency Digital Audio System With Qsound Qhd?
• Manufacturer: STMicroelectronics

Register description
5.3.3
5.4
5.4.1
5.4.2
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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 will force a adjustment to the modulation limit
(default -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 0 x 37 of the user defined coefficient RAM.
Configuration register D (addr 0x03)
High-pass filter bypass
Table 28.
The STA559BWQS 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
Bit
Bit
Bit
7
0
1
MME
D7
0
RW
RW
RW
RW
RW
RW
Over-current warning detect adjustment bypass
High-pass filter bypass
De-emphasis
ZDE
D6
1
RST
RST
RST
1
0
0
DRC
D5
0
OCRB
DEMP
Name
Name
Name
HPB
BQL
D4
0
Over-current warning adjustment bypass:
0: Over-current warning adjustment enabled
1: Over-current warning adjustment disabled
High-pass filter bypass bit. setting of one bypasses
internal AC coupling digital high-pass filter.
De-emphasis:
0: No de-emphasis
1: De-emphasis
PSL
D3
0
DSPB
D2
0
Description
Description
Description
DEMP
D1
0
STA559BWQS
HPB
D0
0