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AR# 13953

4.2i CoolRunner-II CPLDFit - Selecting 1.5V LVCMOS inputs automatically enables Schmitt Trigger circuitry

Description

Keywords: 4.2i, CoolRunner-II, 1.5V LVCMOS, Schmitt Trigger

Urgency: Low

General Description:
The CoolRunner-II data sheet indicates that I should use Schmitt Trigger inputs when using the 1.5V LVCMOS inputs.

This is tedious because I must add "NET MYNET SCHMITT_TRIGGER;" for each of my inputs. Is there an easier way of doing this?

Solution

This is fixed in the latest 4.2i Service Pack, available at:
http://support.xilinx.com/support/techsup/sw_updates
The first service pack containing the fix is 4.2i Service Pack 1.
AR# 13953
Date Created 02/25/2002
Last Updated 08/04/2003
Status Archive
Type General Article