I’m at present designing an influence provide setup for a Cyclone 5 FPGA.

Within the datasheet, it’s acknowledged that if energy provides don’t attain working situations inside the most tRAMP time allowed (100ms in my state of affairs with commonplace POR delay) the gadget will stay tri-stated.

My query is, does the tRAMP spec apply to every completely different provide individually? Or, does it apply to every provide as a complete? e.g. Can I change on the Vcc provide (ramps inside say 10ms) after which wait just a few seconds and change on one other provide? Or, should all of them activate inside 100ms after the primary provide begins to ramp?

The picture beneath is an extract from the datasheet, Determine 10-4 of the Cyclone V Handbook Quantity 1, and appears to indicate they are often timed individually?