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Altera_Forum
Honored Contributor
14 years agoThe POR starts when the main power supplies (VccInt, VccA, and the VccIO for the banks that contain configuration pins) reach a certain level (I tried to find those levels, but I can't see them anywhere in the datasheet). Then you have the POR delay to ensure that those power supplies stabilize within the specified range (+/- 5% usually).