AR# 7174: 4.2i Foundation - Does Foundation 4.2i support functional or timing simulation of the CLKDLL?
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"