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Don't listen to them!!
Well it is reported on clk_scan register. Notice here that your clk_scan register is unlikely to be io register. If you want clk_scan to have less jitter then you better end it up nicely at io register before sending it out.
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Hi kaz, but counter actually can not generate very accurate clock. I try that, for example use counter to create a slow clock (40ns *256), the TimeQuest will tell me the real clock period, which is not exactly 10240ns. If you need very accurate clock, counter does not work very well.
Yes, Clk_Scan is not outputted directly, it connects to a mux, the output of mux will be output to the chip. I will check what I can modify.
Thanks very much!
Honored Contributor
