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STA311B Datasheet(PDF) 73 Page - STMicroelectronics

Part # STA311B
Description  Multichannel digital audio processor with FFXTM
PDF  102 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STA311B Datasheet(HTML) 73 Page - STMicroelectronics

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DocID024340 Rev 1
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STA311B
Configuration registers (0x77; 0x78; 0x79)
102
9.4
PSCorrect registers
An ADC is used to input ripple data to SDI78. The left channel (7) is used internally. No
audio data can therefore be used on these channels, although all channel mapping and
mixing from other inputs to channels 7 and 8 internally are still valid.
9.4.1
PSC1-2: ripple correction value (RCV) (0x51, 0x52)
This value is equivalent to the negative maximum ripple peak as a percentage of Vcc
(MPR), scaled by the inverse of the maximum ripple p-p as a percentage of the full-scale
analog input to the ADC. It is represented as a 1.11 signed fractional number.
9.4.2
PSC3: correction normalization value (CNV) (0x53)
This value is equivalent to 1 / (1+MPR) expressed as a 0.12 unsigned fractional number.
9.5
Extended DRC configuration registers
9.5.1
Extended limiter/dynamic range control LUT (NLENAR)(0x5A)
An extended limiter/DRC LUT has been implemented to provide incremental steps of
0.25/0.50 dB. To enable this feature the NLENAR bit has to be set, refer to the following
tables.
D7
D6
D5
D4
D3
D2
D1
D0
RCV11
RCV10
RCV9
RCV8
RCV7
RCV6
RCV5
RCV4
00
000
00
0
D7
D6
D5
D4
D3
D2
D1
D0
RCV3
RCV2
RCV1
RCV0
CNV11
CNV10
CNV9
CNV8
00
001
11
1
D7
D6
D5
D4
D3
D2
D1
D0
CNV7
CNV6
CNV5
CNV4
CNV3
CNV2
CNV1
CNV0
11
111
11
1
D7
D6
D5
D4
D3
D2
D1
D0
NLENAR
0
Bit
RW
RST
Name
Description
0
RW
0
NLENAR
Enables a new limiter/DRC LUT
0: Extended LUT disabled
1: Extended LUT enabled



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