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AR# 58573

Vivado System Generator (Sysgen) FIR Compiler - The Filter Architecture is changed back to Systolic Multiply Accumulate design even though I selected Transpose Multiply Accumulate

Description

For some configurations, I cannot select "Transpose Multiply Accumulate" for the Filter Architecture.

When I try to select it, it changes back to "Systolic Multiply Accumulate" immediately.

Why does this happen?

Solution

This issue occurs in all AXI based FIR Compilers.

When selecting the "Transpose Multiply Accumulate" architecture, the limitations are as follows:

  • Symmetry is not exploited
  • Multiple interleaved channels are not supported

Vivado Sysgen added a DRC to check this limitation. 

If the coefficient vector is detected as Symmetric, the Sysgen FIR Compiler GUI will not allow you to select "Transpose Multiply Accumulate".

AR# 58573
Date Created 11/27/2013
Last Updated 05/18/2015
Status Active
Type General Article
Tools
  • System Generator for DSP