Forum Discussion

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

CPLD clock issue

This might be a stupid question but I need to see where is the problem. I have two designs with an Altera CPLD MAX3000A, the difference between them is the clock input signal. Both clock signal...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

MAX3000A has a maximum rise/fall time specification of 40 ns for inputs. Without an external schmitt-trigger you won't get clean edges, that can drive edge sensitive design parts without errors.