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AR# 11266

4.1i CORE Generator Multiplier - The "SCLR Overrides CE" option does not function correctly

Description

Keywords: Virtex-II, Multiplier, override, SCLR, CE

Urgency: Standard

General Description:
I am creating a multiplier for the Virtex-II in CORE Generator. If I set the "SCLR Overrides CE" option, this information does not get passed on. Regardless of what selection is made, the following appears in the XCO file:

CSET ce_overrides = CE_Overrides_SCLR

Solution

A work-around is to add the logic externally to the multiplier core; this will force the CE signal High whenever a synchronous reset is applied:

CE_core = CE_in or SCLR;

However, this process does add some delay on the CE line.

This problem has been fixed in Multiplier V4_0, which is available in 4.1i IP Update #1:
http://www.xilinx.com/ipcenter/coregen/updates.htm
AR# 11266
Date Created 03/22/2001
Last Updated 09/11/2003
Status Archive
Type General Article