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Altera_Forum's avatar
Altera_Forum
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18 years ago

Asynchronous signal synchronization

I have seen two circuit for synchronizing Asynchronous signal as the following shows: http://blogimg.chinaunix.net/blog/upfile2/080115160658.jpg Any different between them?
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

Hello,

you can answer the question yourself, if you ask: Could there be a reason to have a reset working without a clock present? If you see a reason, then you should use the first circuit, if not, use the "general" synchronisation circuit, as you like. One possible reason can be, that reset should cause all outputs to switch to a safe state.

Regards.

Frank