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AR# 9435

9.1i FPGA Editor - FPGA_EDITOR reports one of the Virtex-E CLKDLL outputs as "CLK2x90". (It should be CLK2X180.)

Description

FPGA Editor reports one of the Virtex-E DLL outputs as CLK2X90; however, this output pin should be CLK2X180.

Solution

This is an error in FPGA Editor. When the CLK2X180 symbol is used as an output of a CLKDLLE primitive, FPGA Editor will report that the output is called "CLK2X90." This is a visual problem only; the output is not CLK2X90 (90 degrees of phase shift), but is, in fact, CLK2X180 (180 degrees of phase shift).

AR# 9435
Date Created 08/21/2007
Last Updated 05/14/2014
Status Archive
Type General Article