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Altera_Forum
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13 years ago

constraining push button input using TimeQuest

Dear All, have a push-button input to one of the pins in the FPGA. This passes through 2 flip-flops to get into FPGA clock domain. How can I specify this correctly in the TimeQuest? I do not wa...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

If I might profit from your knowledge:)

- having two asynchronous domains, where the data are transferred using two flipflops

- declaring the two clock groups as asynchronous

Do you need to set false path between these synchronization registers in order to get rid of timing errors resulting from the fact, that data are driven by asynchronous clock to the clock of the register being fed?