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STA369BWS データシート(PDF) 35 Page - STMicroelectronics

部品番号 STA369BWS
部品情報  2.1-channel 40-watt high-efficiency digital audio system Sound Terminal?
PDF  89 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STA369BWS データシート(HTML) 35 Page - STMicroelectronics

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STA369BWS
Register description
Doc ID 16861 Rev 4
35/89
Setting the MPC bit turns on special processing that corrects the STA369BWS power device
at high power. This mode should lower the THD+N of a full FFX 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 has no effect on channels 3 and 4, the
line-out channels.
Noise-shaper bandwidth selection
AM mode enable
STA369BWS features a FFX processing mode that minimizes the amount of noise
generated in frequency range of AM radio. This mode is intended for use when FFX is
operating in a device with an AM tuner active. The SNR of the FFX processing is reduced to
approximately 83 dB in this mode, which is still greater than the SNR of AM radio.
PWM speed mode
Distortion compensation variable enable
Table 36.
Noise-shaper bandwidth selection
Bit
R/W
RST
Name
Description
2
R/W
0
NSBW
1: third-order NS
0: fourth-order NS
Table 37.
AM mode enable
Bit
R/W
RST
Name
Description
3R/W
0
AME
0: normal FFX operation.
1: AM reduction mode FFX operation
Table 38.
PWM speed mode
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
Table 39.
Distortion compensation variable enable
Bit
R/W
RST
Name
Description
5
R/W
0
DCCV
0: use preset DC coefficient
1: use DCC coefficient



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