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Altera_Forum's avatar
Altera_Forum
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10 years ago

I got this warning messages. Is is OK?

Hello, I don't have good english skills. but I want to know this mesaages as bellow. Warning (13012): Latch N_XDIO_OE_CPU$latch has unsafe behavior Warning (13013): Ports D and ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

Latches are created when your code infers memory between states. Latches may work but their timing can be affected by temperature, voltage, process, so the behaviour of the circuit may vary over time and with temperature and between compiles (ie. it may work now, but the next time you compile it it may not work).

If you intended a latch, then theres no problem. But if you are worried about the effects above, you should make the circuit fully synchronous.