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schlee68's avatar
schlee68
Icon for New Contributor rankNew Contributor
3 years ago

VREFB pin is open! Is it possible?

Hi Everyone I recently changed jobs. I received a schematic that was already made. It's an Arria 10AX027H4 circuit, and there's something strange about it. The VREFB pins are all open, and yet ...
FvM's avatar
FvM
Icon for Super Contributor rankSuper Contributor
3 years ago

Pin connection guideline directs you to connect unused VREFB to GND or VCCIO. However, it doesn't tell if ignoring this rule prevents FPGA operation. I guess that increased current consumption may occur, don't know if even damage of the FPGA may happen.

If you plan a board redesign, you should definitely fix the point.