Filter Design HDL Coder™

ReuseAccum

Enable accumulator reuse, generating cascade-serial architecture for FIR filters

Settings

'off' (default)

Disable accumulator reuse.

'on'

Enable accumulator reuse when generating a partly serial architecture. ( i.e., a cascade-serial architecture). If the number and size of serial partitions is not specified (see SerialPartition), the coder generates an optimal partition.

Usage Notes

In a cascade-serial architecture, filter taps are grouped into a number of serial partitions, and the accumulated output of each partition is cascaded to the accumulator of the previous partition. The output of all partitions is therefore computed at the accumulator of the first partition. This technique, termed accumulator reuse, saves chip area.

See Speed vs. Area Optimizations for FIR Filters for a complete description of parallel and serial architectures and a list of filter types supported for each architecture.

See Also

SerialPartition

ResetType

SafeZeroConcat