Polyphase Decimation Filter
Figure 43 and Figure 44 show examples of the core pinout in Constant and Reloadable coefficient modes
and Figure 45 shows Multiple coefficient set mode.
CoreFIR
Input data
input data valid
DATAI
DATAI_VALID
FIRO
FIRO_VALID
output data
output data valid
COEFI
COEFI_VALID
COEF_SEL
Optional
refresh coefficient set
COEF_REF
COEF_REF_DONE
Optional flag of set
loading completion
COEF_ON
Clock
Synch reset
Asynch reset
CLK
RSTN
NGRST
Figure 43 · Constant Coefficient Configuration
CoreFIR
Input data
Input data valid
Reloadable coefficients
Coefficient valid
DATAI
DATAI_VALID
COEFI
COEFI_VALID
FIRO
FIRO_VALID
output data
output data valid
COEF_SEL
Optional
refresh coefficient set
Enable newly loaded
coefficient set
Clock
Synch reset
Asynch reset
COEF_REF
COEF_ON
CLK
RSTN
NGRST
COEF_REF_DONE
Optional flag of set
loading completion
Figure 44 · Reloadable Coefficient Configuration
50
CoreFIR v8.5 Handbook
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