Forum Discussion
BrianSune_Froum
Contributor
ContributorCyclone V custom board VCCIO puzzling behavior
Dear Intel and all, I am working on Cyclone V soc 5CSEBA5U19C8N. There is a very puzzling VCCIO behavior. According to "Cyclone® V Device Family Pin Connection Guidelines PCG-01014-3.2". Any 3...
There are new measured data.
If I attached a simple 10k resistor to the 1.2V rail. it will drop back to normal 1.2 range.
But the loaded /w 10k is still measuring 40mV higher than unloaded DCDC w/o the FPGA chip.
So there are some leakage current inside the diode path? from VCCPD to VCCIO?
Farabi_Altera
Regular Contributor
Regular ContributorHello,
Let me check with internal team.
rgards,
Farabi
BrianSune_FroumPlease do investigate with internal and provide solution and possible causes on such behavior.
This ensure other designer and user should know what VCCPD and VCCIO could be supported.
Bests,
Brian
