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Altera_Forum
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11 years ago

Programming HPS pins in Quartus II - Unused HPS Pins

Dear community, On my PCB design, most of the HPS pins are unused - according to the pin connection guidelines, I should either 'Connect unused pins as defined in the Quartus II software' (for ...
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Altera_Forum
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11 years ago

Hi BadOmen,

Thanks for your quick reply! Sorry I forgot to mention that I'm using the Cyclone V SX, but it should be the same for the Arria.

Yes, I have been consulting the Pin Connection Guidelines (www.altera.com/literature/dp/cyclone-v/pcg-01014.pdf (http://www.altera.com/literature/dp/cyclone-v/pcg-01014.pdf)), and like you said it gives the recommended setting like 'If unused, program it in Quartus as an input with a weak pull-up.'

However, from the Cyclone V Handbook I learn that HPS I/Os are configured by the Preloader. But since Quartus has nothing to do with Preloaders, are you sure that the default setting for pins in Quartus also applies to HPS I/Os?

Moreover, in the Quartus Pin Planner (Assignments --> Pin Planner), I cannot assign the HPS Pins to anything - only the FPGA Pins.

Thanks,

Adam