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SWilb1's avatar
SWilb1
Icon for New Contributor rankNew Contributor
6 years ago

Will the 5CEFA4U19 chip work without some power pins connected as suggested by the Quartus migration feature.

I am designing a Cyclone V E (U19-484 pins) board to have vertical migration from A4 to A9. I used the migration feature in Quartus with 5CEFA4U19 as the target and the A5, A7 and A9 chips selected t...
MBenca's avatar
MBenca
Icon for Occasional Contributor rankOccasional Contributor
6 years ago

Hi,

I would recommend to look to Cyclone V Device Family Pin Connection Guidelines (https://www.intel.com/content/dam/altera-www/global/en_US/pdfs/literature/dp/cyclone-v/pcg-01014.pdf)

There is the following fragment as an explanation of NC pin, section Pin Connection Guidelines, Reference Pins, p.17:

Cyclone V Pin Name = NC, Pin Type = No Connect, Pin Description = Do not drive signals into these pins. Connection Guidelines = When designing for device migration, these pins may be connected to power, GND, or a signal trace depending on the pin assignment of the devices selected for migration. However, if device migration is not a concern, leave these pins floating.

Maybe I am wrong but this fragment sounds to me in case of a device migration it is possible to connect NC pins to active signals such as GND or power.

Regards,

Martin