AR# 42471

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

描述

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?

解决方案

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
日期 07/11/2011
状态 Active
Type 已知问题
器件
Tools
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