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STA350B Datasheet(PDF) 44 Page - STMicroelectronics

Part # STA350B
Description  2.1-channel high-efficiency digital audio system Sound TerminalR
PDF  94 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STA350B Datasheet(HTML) 44 Page - STMicroelectronics

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Register description
STA350B, STA350BW
44/94
DocID018572 Rev 7
8.3.3
Overcurrent warning detect adjustment bypass
The OCWARN input is used to indicate an overcurrent 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 overcurrent warning condition. Once the
overcurrent warning volume adjustment is applied, it remains in this state until a reset
occurs. 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.
8.4
Configuration register D (addr 0x03)
8.4.1
High-pass filter bypass
The STA350Bx 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 an FFX amplifier. DC
signals can cause speaker damage. When HPB = 0, this filter is enabled.
8.4.2
De-emphasis
Table 26. Overcurrent warning bypass
Bit
R/W
RST
Name
Description
7
R/W
1
OCRB
0: Overcurrent warning adjustment enabled
1: Overcurrent warning adjustment disabled
D7
D6
D5
D4
D3
D2
D1
D0
SME
ZDE
DRC
BQL
PSL
DSPB
DEMP
HPB
0100
0000
Table 27. High-pass filter bypass
Bit
R/W
RST
Name
Description
0R/W
0
HPB
Setting of one bypasses internal AC coupling digital
high-pass filter
Table 28. De-emphasis
Bit
R/W
RST
Name
Description
1
R/W
0
DEMP
0: No de-emphasis
1: Enable de-emphasis on all channels



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