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AR# 1066

XBLOX 5.x: ONE_HOT COUNTER with unconnected UP/DN pin results in DOWN counter


Keywords: XBLOX, one hot counter, up/down, counter

Urgency: Standard

General Description:

The XBLOX Reference/User Guide specifies that an XBLOX counter with the
UP/DN pin unconnected will default to an up counter. However, if
STYLE=ONE_HOT, a DOWN counter will be created. (The "hot" bit, for
example, will step from bit 1 to bit 0, instead of from bit 1 to bit 2 as


To synthesize a ONE_HOT up counter, attach the COUNTER's UP/DN pin to VCC.
AR# 1066
Date Created 06/20/1996
Last Updated 05/24/1999
Status Archive
Type General Article