AR# 5422: 15i Virtex DRC - DRC incorrectly flags a CLKDLL that drives both CLK0 and CLK2X offchip.
AR# 5422
15i Virtex DRC - DRC incorrectly flags a CLKDLL that drives both CLK0 and CLK2X offchip.
説明
Running physical design DRC... ERROR:xvkdr:41 - blockcheck: Improper DLL feedback loop. DLL dll_ext has an invalid output. Since input pin CLKFB is being driven by a GCLKIOB, either CLK0 or CLK2X must be used.
ソリューション
A fix for this problem will be included in version 2.1 due to be released in June 1999.