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AR# 15094

5.2i XPower - The current for bidirectional inputs is calculated incorrectly

Description

Keywords: 5.2i, 5.1i, XPower, current, input

Urgency: Low

General Description:
The current for bidirectional inputs should be calculated using VCCINT; however, it is incorrectly calculated using the voltage of the associated output buffer. This causes the current to be incorrect in the XPower GUI and the (detailed) report file.

(NOTE: This issue affects the Virtex, Virtex-E, Spartan-II, Spartan-IIE, and Virtex-II device families.)

Solution

This resulting inaccuracy is not significant when the dynamic power required for an FPGA is taken into consideration.

This issue is fixed in the 6.1i software.
AR# 15094
Date Created 07/10/2002
Last Updated 04/05/2006
Status Archive
Type General Article