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Altera_Forum
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10 years ago

Securely start a State-Machine with pulses or edges

Hi there, this problem occures in my work from time to time: I want to start a State-Machine (Transition from Idle-State S000 to State S010) either with a single one-clock-pulse or on the edg...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

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Hi kaz,

yes it is. I already mentioned it above.

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I meant do you use two stage synchroniser on start_in e.g.

on clock edge:

start_1d <= start_in;

start_2d <=start_1d;

then use start_2d as input to state machine(not start_1d, nor start_in)

and make sure start_in is of enough duration to be sampled