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Altera_Forum
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15 years ago

Simulation Error

Hi, all: I encoutered a problem --- when I do RTL simualtion, it shows a warning: Warning : Invalid transition to 'X' detected on PLL input clk. This edge will be ignored. Time: 0 Instance...
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Altera_Forum
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14 years ago

Hi, Daixiwen:

Thanks for the reply. I found the error was caused by the unit of timescale. I change 1ps to 1ns, and the error vanished.