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STA382BWSTR Arkusz danych(PDF) 115 Page - STMicroelectronics

Numer części STA382BWSTR
Szczegółowy opis  Sound Terminal 2.1-channel high-efficiency digital audio system
PDF  172 Pages
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Producent  STMICROELECTRONICS [STMicroelectronics]
Strona internetowa  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STA382BWSTR Arkusz danych(HTML) 115 Page - STMicroelectronics

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STA382BWS
Register description: Sound Terminal compatibility
Doc ID 022784 Rev 1
115/172
7.5.1
Noise-shaper bandwidth selection
7.5.2
AM mode enable
The STA382BWS 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 120.
Noise-shaper bandwidth selection
Bit
R/W
RST
Name
Description
2
R/W
0
NSBW
1: Third order NS
0: Fourth order NS
Table 121.
AM mode enable
Bit
R/W
RST
Name
Description
3R/W
0
AME
0: Normal FFX operation
1: AM reduction mode FFX operation
Table 122.
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. Not suitable for
binary BTL mode.
Table 123.
Zero-crossing enable
Bit
R/W
RST
Name
Description
6R/W
0
ZCE
‘1’: Volume adjustments only occur at digital zero-crossing
‘0’: Volume adjustments occur immediately
Table 124.
Soft volume update enable
Bit
R/W
RST
Name
Description
7R/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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