AR# 7174

4.2i Foundation - Does Foundation 4.2i support functional or timing simulation of the CLKDLL?

Description

Keywords: simulation, functional, timing, CLKDLL

Urgency: Standard

General Description:
Does Foundation 4.2i support functional or timing simulation of the CLKDLL?

Solution

Foundation does not support the CLKDLL in functional simulation. In order to perform a functional simulation of your design, apply the appropriate stimulus to the CLKDLL outputs.

Foundation does support the CLKDLL in timing simulation; however, two known limitations are discussed the following solutions:

(Xilinx Answer 6966): "The CLKDV_DIVIDE value is not applied during timing simulation"
(Xilinx Answer 8398): "Timing simulation of Virtex DLL fails when the input frequency is higher than 100MHz"
AR# 7174
Date 08/12/2003
Status Archive
Type General Article