AR# 42471


13.1 PlanAhead - Virtual Power/GND pins incorrectly reduce SSN Margin


If I add virtual Power/Gnd pins to a bank in a design (as suggested by UG381 under Pin-Planning) to Mitigate SSO Sensitivity, the available margin actually decreases instead of increasing. Why?


The PlanAhead tool 13.1 SSN algorithm is incorrectly accounting the effect of virtual Vcc and ground pins.

This issue is fixed in PlanAhead tool 13.2.
AR# 42471
Date 07/11/2011
Status Active
Type Known Issues
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