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STA339BWTR View Datasheet(PDF) - STMicroelectronics

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STA339BWTR Datasheet PDF : 78 Pages
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Register description
STA339BW
7.5.3
Noise-shaper bandwidth selection
Table 39. Noise-shaper bandwidth selection
Bit R/W RST
Name
Description
2 R/W 0
NSBW
1: Third order NS
0: Fourth order NS
7.5.4
7.5.5
AM mode enable
Table 40. AM mode enable
Bit R/W RST
Name
Description
3 R/W 0
AME
0: Normal FFX operation.
1: AM reduction mode FFX operation
STA339BW features aFFX 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
Table 41. 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
7.5.6
Distortion compensation variable enable
Table 42. Distortion compensation variable enable
Bit R/W RST
Name
Description
5 R/W 0
DCCV
0: Use preset DC coefficient
1: Use DCC coefficient
7.5.7
Zero-crossing volume enable
Table 43. Zero-crossing volume enable
Bit R/W RST
Name
Description
6 R/W 1
ZCE
1: Volume adjustments only occur at digital zero-
crossings
0: Volume adjustments occur immediately
The ZCE bit enables zero-crossing volume adjustments. When volume is adjusted on digital
zero-crossings no clicks are audible.
38/78
DocID15251 Rev 7
 

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