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STA381BWS Folha de dados(PDF) 117 Page - STMicroelectronics

Nome de Peças STA381BWS
Descrição Electrónicos  Sound Terminal 2.1-channel high-efficiency digital audio system
PDF  174 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STA381BWS Folha de dados(HTML) 117 Page - STMicroelectronics

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STA381BWS
Register description: Sound Terminal compatibility
7.5.1
Noise-shaper bandwidth selection
7.5.2
AM mode enable
The STA381BWS features an FFX processing mode that minimizes the amount of noise
generated in the frequency range of AM radio. This mode is intended for use when FFX is
operating in a device with an active AM tuner. 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.
7.5.3
PWM speed mode
7.5.4
Zero-crossing enable
The ZCE bit enables zero-crossing adjustment. When volume is adjusted on digital zero-
crossing, no clicks are audible.
7.5.5
Soft volume update enable
Table 119. Noise-shaper bandwidth selection
Bit
R/W
RST
Name
Description
2
R/W
0
NSBW
1: Third order NS
0: Fourth order NS
Table 120. AM mode enable
Bit
R/W
RST
Name
Description
3
R/W
0
AME
0: Normal FFX operation
1: AM reduction mode FFX operation
Table 121. PWM speed mode
Bit
R/W
RST
Name
Description
4
R/W
0
PWMS
0: Normal speed (384 kHz) all channels
1: Odd speed (341.3 kHz) all channels. Not suitable for
binary BTL mode.
Table 122. Zero-crossing enable
Bit
R/W
RST
Name
Description
6
R/W
0
ZCE
1: Volume adjustments only occur at digital zero-crossing
0: Volume adjustments occur immediately
Table 123. Soft volume update enable
Bit
R/W
RST
Name
Description
7
R/W
1
SVE
1: Volume adjustments ramp according to SVR settings
0: Volume adjustments occur immediately
Obsolete
Product(s)
- Obsolete
Product(s)



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