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STA323W Datasheet(PDF) 47 Page - STMicroelectronics

Part # STA323W
Description  2.1-channel high-efficiency digital audio system
PDF  77 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STA323W Datasheet(HTML) 47 Page - STMicroelectronics

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STA323W
Register descriptions
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7.5.5
Zero-crossing volume enable
The ZCE bit enables zero-crossing volume adjustments. When volume is adjusted on digital
zero-crossings no clicks are audible.
7.5.6
Soft volume update enable
The STA323W includes a soft volume algorithm that steps through the intermediate volume
values at a predetermined rate when a volume change occurs. By setting SVE = 0 this can
be bypassed and volume changes will jump from the old to the new value directly. This
feature is available only if individual channel volume bypass bit is set to 0.
Table 40.
PWM output speed selections
PWMS[1:0]
PWM output speed
0
Normal speed (384kHz) all channels
1
Odd speed (341.3kHz) all channels
Table 41.
Zero-crossing volume enable
Bit
R/W
RST
Name
Description
6RW
1
ZCE
1: volume adjustments will only occur at digital zero-
crossings
0: volume adjustments will occur immediately
Table 42.
Soft volume update enable
Bit
R/W
RST
Name
Description
7
RW
1
SVE
1: volume adjustments will use soft volume
0: volume adjustments will occur immediately



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