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Altera_Forum
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10 years ago

Dedicated Clock Input Pins in Arria V

Good day. There is one question about “dedicated clock pins CLK[23..0]p,n”. In pin connection guidelines it is stated that these pins are dedicated positive and negative clock input pins, that ca...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

Hi Elert,

Basically, the dedicated clk pins (CLK[0:23]p) are mainly used to connect to the plls. Those are the special function pins.

For your question on whether they can be use as bidir or input pins. Yes, you can do so. All pins works as GPIO but occassionally they are tied to some special functions as you mentioned in the DIFFIO (differential pins) or CLK (for dedicated clock pin)