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Polyphase Interpolation Filter
Parameter Name
Valid
Default
Description
Range
automatically transfers to the core.
DIE_SIZE
5, 10,
15, 20,
25, 30
20
Die size. The parameter is set through the Libero SoC project settings
dialog and automatically transfers to the core. If the Libero device selection
changes, the core configuration interface must be invoked and RTL
regenerated.
COEF_RAM
0-1
0
0: Build Coefficient ROM out of fabric resources.
1: Build Coefficient ROM using RAM blocks available on a chip.
DATA_RAM
SAMPLEID
ID_WIDTH
URAM_MAXDEPTH
0-1
0-1
1-10
0
0
0
5
2, 4, 8,
16, 32, 64
Interpolation filter does not use the parameter.
Interpolation filter does not use the parameter.
Interpolation filter does not use the parameter.
Micro RAM upper limit. Limits the depth of uRAM to be taken for data
and/or coefficient storage. Once either one or both COEF_RAM or /and
DATA_RAM parameters are set, the core uses on-chip RAM blocks to
implement appropriate storage. If the required storage depth does not
exceed the URAM_MAXDEPTH value, the uRAM should be used,
otherwise the core utilizes LRAM blocks.
L
M
2-512
2-512
2
2
Interpolation factor L.
Interpolation filter does not use the parameter.
Ports
The interpolation FIR filter symbol is shown on Figure 34 . Table 12 provides the port definitions for the core.
CoreFIR
DATAI
DATAI_VALID
COEFI
COEFI_VALID
COEF_SEL
COEF_REF
COEF_ON
RCLK
FIRO
FIRO_VALID
COEF_REF_DONE
READY
CLK
RSTN
NGRST
Figure 34 · CoreFIR I/O Ports
38
CoreFIR v8.5 Handbook
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