CS5376 View Datasheet(PDF) - Cirrus Logic
Part Name
Description
MFG CO.
CS5376 Datasheet PDF : 122 Pages
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CS5376
8.1.4 Output Word Rate
The CS5376 digital filters support output word
rates (OWRs) between 62.5 Hz and 4 kHz. The out-
put word rate is selected using the DEC bits (bits 4-
6) in the FILT_CFG register, with the decimation
ratios for each filter stage set automatically de-
pending on the output filter configuration. Figure
33 lists the decimation settings based on the select-
ed output configuration.
Not all output rates are supported for all output fil-
ter configurations. The available decimation ratios
limit the FIR1 output configuration to output word
rates between 250 Hz and 4 kHz, and the sinc filter
output configuration to a single 4 kHz output word
rate. Selecting an unsupported output word rate re-
sults in the closest supported output word rate.
Sinc Filter Output Configuration - FSEL Bits = 0x00
Output
Word Rate
4 kHz
DEC Bits
Setting
0x07
Input Bit
Rate
512 kHz
Sinc
Decimation
128
FIR1
Decimation
-
FIR2
Decimation
-
Total
Decimation
128
FIR1 Filter Output Configuration - FSEL Bits = 0x01
Output
Word Rate
4 kHz
2 kHz
1 kHz
500 Hz
333.3 Hz
250 Hz
DEC Bits
Setting
0x07
0x06
0x05
0x04
0x03
0x02
Input Bit
Rate
512 kHz
512 kHz
512 kHz
512 kHz
512 kHz
512 kHz
Sinc
Decimation
32
64
128
64
96
128
FIR1
Decimation
4
4
4
16
16
16
FIR2
Decimation
-
-
-
-
-
-
Total
Decimation
128
256
512
1024
1536
2048
FIR2 Filter, IIR Filter Output Configurations - FSEL Bits = 0x02, 0x03, 0x04, 0x05
Output
Word Rate
4 kHz
2 kHz
1 kHz
500 Hz
333.3 Hz
250 Hz
125 Hz
62.5 Hz
DEC Bits
Setting
0x07
0x06
0x05
0x04
0x03
0x02
0x01
0x00
Input Bit
Rate
512 kHz
512 kHz
512 kHz
512 kHz
512 kHz
512 kHz
512 kHz
512 kHz
Sinc
Decimation
16
32
64
128
96
64
128
128
FIR1
Decimation
4
4
4
4
4
16
16
16
FIR2
Decimation
2
2
2
2
4
2
2
4
Total
Decimation
128
256
512
1024
1536
2048
4096
8192
Figure 33. Supported Output Word Rates
DS256PP1
55
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