Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

Cyclone 3 problem: Holding nConfig low

I am having a really weird problem with a really simple board. Using an EP3C25E144C8N, active serial configuration mode with an EPCS16, MSEL[2:0] = 010. I can successfully erase and program the con...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

Thanks FvM! Actually, you and Altera support both pointed me in the same direction today...I had not connected the exposed pad! The note on what to do with it was footnote# 7 at the bottom of page 9 on the pinout listing...not the most prominent location for it, and I obviously missed it :-/

I'm going to pull the part tomorrow and try attaching some tiny wires to the pad to ground it, and verify that this is in fact the issue before I respin the board.