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Altera_Forum
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9 years ago

Reserve all unused pins: As input tri-stated with weak pull-up-Leds are glow faintly

Hello everyone, i am new to FPGA programming. I have set the unused pins to tri-stated with weak pull-up. As a result, all the unused LEDs are dim. Is there a way to prevent this without havi...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
9 years ago

Thank you very much for your answer.

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How about adding this to your .qsf file instead:

set_global_assignment -name RESERVE_ALL_UNUSED_PINS "AS OUTPUT DRIVING GROUND"

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The default setting of Quartus was 'as output driving ground' for the unused pins.

By this setting, I received the warning, "The Reserve All Unused Pin Set has not been specified, and will default to As output driving ground."

But I must avoid this warning.