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AR# 7728

2.1i Virtex Map - The default input path delay element usage is being changed.

Description

Keywords: Delay, input path, default

Urgancy: Standard

General Description:
1.5i had defaults of NODELAY for the "I" path out of IOBs, and DELAY for
data paths feeding the input FF inside the IOB. 2.1i automatically inserts
DELAY for both paths. General FAE and expert user consensus is that we
should revert back to the 1.5i default. Also, if DLL drives clock on FF inside
IOB, NODELAY should be the proper default.

解决方案

This problem is fixed in the latest 2.1i Service Pack available at:
http://support.xilinx.com/support/techsup/sw_updates/
AR# 7728
创建日期 09/21/1999
Last Updated 07/20/2001
状态 Archive
Type 综合文章