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AR# 7533

XPLA Professional - What does the XPLA Property "TRI-STATE" do?

Description

Keywords: XPLA, Professional, CoolRunner, fitter, property, tri-state

Urgency: Standard

General Description:
What does the XPLA Property "TRI-STATE" do?

解决方案

XPLA Software supports two properties that will disable the weak
pull-down resistor on unused pins and leave these pins tri-stated. This
is useful when there are unused pins connected to a bus.

For example, the following property disables pull-down on all unused pins
and tri-states them:

xpla property 'tri-state all';


This disables pull-down on u1 at pin 4 and tri-states that pin:

xpla property 'u1:4 tri-state';

NOTE: A pin name must be specified even though the pin is unused.
AR# 7533
创建日期 09/14/1999
Last Updated 04/09/2002
状态 Archive
Type 综合文章