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AR# 32482 11.1 PlanAhead - Does PlanAhead DRC report single-ended clocks on the N side of a differential pair?

Description

Keywords: GCLK, BUFG, global, IBUFG, negative, GC, CC

I accidentally constrained my single-ended clock to the N side of a Global Clock differential pair.

Why did PlanAhead allow me constrain the clock to this location, and why did DRC not report it?

Solution

PlanAhead currently Auto-Places clocks only to the P side, but allows you to assign the clock to the N side without a DRC error.

This problem is scheduled to be fixed in a future software release.

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AR# 32482
Date Created 04/10/2009
Last Updated 04/20/2009
Status Active
Type
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