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STA309A датащи(PDF) 30 Page - STMicroelectronics

номер детали STA309A
подробное описание детали  Multi-channel digital audio processor with DDX
PDF  67 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STA309A датащи(HTML) 30 Page - STMicroelectronics

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Post-scale functionality can be used for power-supply error correction. For multi-channel
applications running off the same power-supply, the post-scale values can be linked to the
value of channel 1 for ease of use and update the values faster.
For ease of use, all channels can use the biquad coefficients loaded into the channel 1
Coefficient RAM space by setting the BQL bit to 1. Therefore, any EQ updates only have to
be performed once.
Table 30.
PSL bit
Bit
RW
RST
Name
Description
3
RW
0
PSL
Post-scale link:
0: each channel uses individual post-scale value
1: each channel uses channel 1 post-scale value
Table 31.
BQL bit
Bit
RW
RST
Name
Description
4RW
0
BQL
Biquad link:
0: each channel uses coefficient values
1: each channel uses channel 1 coefficient values
Table 32.
PWMS bits
Bit
RW
RST
Name
Description
7:5
RW
00
PWMS[2:0]
PWM speed selection:
Table 33.
PWM output speed
PWMS[1:0]
PWM output speed
000
Normal speed (384 kHz) (all channels
001
Half-speed (192 kHz) (all channels
010
Double-speed (768 kHz) (all channels
011
Normal speed (channels 1-6), double-speed (channels 7-8)
100
Odd speed (341.3 kHz) (all channels)



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