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Altera_Forum
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11 years ago

dedicated input clock I/O pin as regular input in Cyclone IV

Hello, I would like to use GLK3 dedicated input clock as regular user input on Cyclone IV EP4CE6E22 It seems OK but the fitter (Quartus 13.1) return the following warning: Warning (1...
Altera_Forum's avatar
Altera_Forum
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11 years ago

The warning message concerns an IO input that is not used as a clock. When I have this message (regular input on GCLK pin) the fitter report indicates a fanout of 0.

I have tried to remove the pin allocation and the message disappears. Moreover, in this case the fitter report indicates a fanout of 2...

I don't use clock going into general purpose. All input clocks are located on GCLKx pins.