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STA335BWS 数据表(PDF) 34 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) 34 Page - STMicroelectronics

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Register description
STA335BWS
34/68
6.5.2
Max power correction
Setting the MPC bit turns on special processing that corrects the STA335BWS power device
at high power. This mode should lower the THD+N of a full DDX system at maximum power
output and slightly below. If enabled, MPC is operational in all output modes except tapered
(OM[1,0] = 01) and binary. When OCFG = 00, MPC will not effect channels 3 and 4, the
line-out channels.
6.5.3
Noise-shaper bandwidth selection
6.5.4
AM mode enable
STA335BWS 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.
6.5.5
PWM speed mode
6.5.6
Distortion compensation variable enable
Bit
R/W
RST
Name
Description
1R/W
1
MPC
Setting of 1 enables Power Bridge correction for
THD reduction near maximum power output.
Bit
R/W
RST
Name
Description
2
R/W
0
NSBW
1: Third order NS
0: Fourth order NS
Bit
R/W
RST
Name
Description
3R/W
0
AME
0: Normal DDX operation.
1: AM reduction mode DDX operation
Bit
R/W
RST
Name
Description
4R/W
0
PWMS
0: Normal speed (384 kHz) all channels
1: Odd speed (341.3 kHz) all channels
Bit
R/W
RST
Name
Description
5R/W
0
DCCV
0: Uses preset DC coefficient
1: Uses DCC coefficient



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