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STA335BWQS Datasheet(PDF) 37 Page - STMicroelectronics

Part # STA335BWQS
Description  2.1-channel high-efficiency digital audio system with QSound QHD
PDF  72 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STA335BWQS Datasheet(HTML) 37 Page - STMicroelectronics

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STA335BWQS
Register description
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7.5.4
AM mode enable
STA335BWQS features a DDX processing mode that minimizes the amount of noise
generated in frequency range of AM radio. This mode is intended for use when DDX is
operating in a device with an AM tuner active. The SNR of the DDX processing is reduced to
~83 dB in this mode, which is still greater than the SNR of AM radio.
7.5.5
PWM speed mode
7.5.6
Distortion compensation variable enable
7.5.7
Zero-crossing volume enable
The ZCE bit enables zero-crossing volume adjustments. When volume is adjusted on digital
zero-crossings no clicks are audible.
7.5.8
Soft volume update enable
Table 39.
AME
Bit
R/W
RST
Name
Description
3RW
0
AME
0: Normal DDX operation.
1: AM reduction mode DDX operation
Table 40.
PWMS
Bit
R/W
RST
Name
Description
4RW
0
PWMS
0: Normal speed (384 kHz) all channels
1: Odd speed (341.3 kHz) all channels
Table 41.
DCCV
Bit
R/W
RST
Name
Description
5
RW
0
DCCV
0: Uses preset DC coefficient
1: Uses DCC coefficient
Table 42.
ZCE
Bit
R/W
RST
Name
Description
6RW
1
ZCE
1: Volume adjustments only occur at digital
zero-crossings
0: Volume adjustments occur immediately
Table 43.
SVE
Bit
R/W
RST
Name
Description
7RW
1
SVE
1: Volume adjustments ramp according to SVR settings
0: Volume adjustments occur immediately



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