Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

Quartus II, FSM, Vector waveform file not giving correct output

Hi there, this is my first post so i'm quite new to this forum. I have designed a circuit that should give me an output of 1 when it detects an input of 101. For some reason it doesn't seem to...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

If the input is asynchronous, then you will probably be violating the setup time on the registers, causing them to go meta-stable. You need to double register the input to ensure you avoid meta-stable inputs.