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STA335BWS 数据表(PDF) 31 Page - STMicroelectronics

部件名 STA335BWS
功能描述  2.1-channel high-efficiency digital audio system
PDF  68 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

STA335BWS 数据表(HTML) 31 Page - STMicroelectronics

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STA335BWS
Register description
31/68
6.3.2
DDX compensating pulse size register
Table 6:
6.3.3
Over-current warning detect adjustment bypass
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.
6.4
Configuration register D (addr 0x03)
6.4.1
High-pass filter bypass
The STA335BWS 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.
Bit
R/W
RST
Name
Description
2R/W
1
CSZ0
When OM[1,0] = 11, this register determines the
size of the DDX compensating pulse from 0 clock
ticks to 15 clock periods.
3R/W
0
CSZ1
4R/W
1
CSZ2
5R/W
0
CSZ3
Table 15.
Compensating pulse size
CSZ[3:0]
Compensating Pulse Size
0000
0 ns (0 tick) compensating pulse size
0001
20 ns (1 tick) clock period compensating pulse size
……
1111
300 ns (15 ticks) clock period compensating pulse size
Bit
R/W
RST
Name
Description
7
R/W
1
OCRB
0: Over-Current warning Adjustment enabled
1: Over-Current warning Adjustment disabled
D7
D6
D5
D4
D3
D2
D1
D0
MME
ZDE
DRC
BQL
PSL
DSPB
DEMP
HPB
01
00
000
0
Bit
R/W
RST
Name
Description
0R/W
0
HPB
Setting of one bypasses internal AC coupling digital
high-pass filter



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