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AR# 34497

Reasons for the resource utilization change between MAP and Synthesis

Description

Resource utilization reports can be found in both the synthesis phase and map phase.

Sometimes the resource utilization can be very different in these two reports.

What is the cause of these differences?

Solution


Possible reasons for a resource utilization increase in the MAP report compared to the synthesis report:

  • XST does not read cores (disabled or -sd directory incorrect) but NGDBuild reads blackbox cores.

Possible reasons for a resource utilization decrease in the MAP report compared to the Synthesis report:
 
  • logic trimming
  • IOBUF not added during synthesis
AR# 34497
Date Created 02/25/2010
Last Updated 02/17/2015
Status Active
Type General Article
Tools
  • ISE Design Suite