Folded Filter Interface
Figure 23 and Figure 24 show examples of the semi-parallel filter active ports in Constant and Reloadable
coefficient modes. Figure 25 on page 30 shows Multiple coefficient set mode.
CoreFIR
input data
input data valid
DATAI
DATAI_VALID
COEFI
FIRO
DATAO_VALID
READY
output data
output data valid
ready for a new
input data sample
COEFI_VALID
COEF_ON
COEF_SEL
optional pulse to
refresh coefficient set
optional sample ID
clock
synch reset
asynch reset
COEF_REF
SAMPLE_ID
CLK
RSTN
NGRST
COEF_REF_DONE
FIRO_ID
COEF_ON_SLOT
optional flag of set
loading completion
optional output ID
Figure 23 · Folded Constant Coefficient Configuration
CoreFIR
input data
input data valid
reloadable coefficients
reloadable
coefficient valid
swap active and
auxiliary pages
DATAI
DATAI_VALID
COEFI
COEFI_VALID
COEF_ON
FIRO
DATAO_VALID
READY
output data
output data valid
ready for a new
input data sample
COEF_SEL
load coefficient set
in auxiliary page
optional sample ID
clock
synch reset
asynch reset
COEF_REF
SAMPLE_ID
CLK
RSTN
NGRST
COEF_REF_DONE
FIRO_ID
COEF_ON_SLOT
optional flag of set
loading completion
optional output ID
optional time slot
for COEF_ON
Figure 24 · Folded Reloadable Coefficient Configuration
CoreFIR v8.5 Handbook
29
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