In power sequencing defined for Cyclone V E,Is there any time period specified between 2 sequences(ie , group 1: +1.1V , group2: +2.5V)?
I have observed the sentence : "Ramp up the power rails in Group 1 to a minimum of 80% of their full rail before Group 2 starts."
No Time difference between sequences is mentioned.
Sorry for late response. For different power rail groups' power up sequence, we need to meet the voltage points requirement in order to meet the spec. I am quoting one of the external site's example diagram as follow (this is for Arria 10 requirement but the same concept applied to Cyclone V devices per Cyclone V spec):
The example diagram above is showing the Arria10 device, we shall refer to the spec for the power rails available in Cyclone V. The recommended power down is in the reverse sequential order of the power up sequence.