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AR# 7529

XPLA Professional - Fitter error occurs when reset signal cannot be assigned to the global reset pin.

説明

Keywords: XPLA, Professional, CoolRunner, fitter, XPLA2, global, reset

Urgency: Standard

General Description:
Why do I encounter an error with the fitter that says my reset signal cannot be
assigned to the global reset pin on XPLA2 devices?

ソリューション

Any signal can be assigned to the global reset pin in XPLA2 devices and
applied to all macrocells as an asynchronous reset. This signal is not
routed through any logic or the ZIAs, but comes directly from this pin.

The global reset is "active low," which means that the signal should be
negated to the flip-flop. If the equation for the flip-flop reset appears to
be "active high," an error occurs in the fitter, saying that the specified
signal cannot be assigned to the global reset. The reset signal is assigned
to the global reset pin by the pin assignment in the control file.
AR# 7529
作成日 09/14/1999
最終更新日 02/12/2002
ステータス アーカイブ
タイプ 一般