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Altera_Forum
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11 years ago

MAX 7000 unused dedicated inputs

Hello all, I am using a MAX 7000AE CPLD. I don't plan on using the GCLK, GCLRn, OE1, or OE2. What should be done with these unused pins? Left floating or driven to GND? Pull GCLRn up to VCC? ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

For Max 7000 unused pins, you can set it from the Quartus II setting. Goto Device and Pin Options, you should be able to reserved all unused pins as output driving ground or as input tri-stated

It is not recommended to leave the pin floating.

If the dedicated input or IO pins are left floating, then the input transistors might fall outside of the saturation or cut-off region. As a results, the device could draw additional current and increase the devices' power consumption.