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Altera_Forum's avatar
Altera_Forum
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16 years ago

Weak pull-up resistors

Hi,

I am using a MAX-II CPLD. I would to set certain input pins as with the option of weak pull-up resistors.

In Tools/Settings/Fitter Settings/More Fitter Settings there is an option for weak pull-up resistor. However looking into the fitter report file, it seems that all the device pins were set with this option.

How do I set only individul pins to have this option?

Thanks,

EitanB

2 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    16 years ago

    They are set for unused pins by default, but not for pins defined as input. For inputs or bidrectional pins, you have to enable the respective column in the Pin Planner's context menu and set the option to "on" for the intended pins. Or use the assignment editor.