Forum Discussion

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

nCE signal behavour

Hi everybody, there is a small question about nCE behavour. It is safe to change nCE signal after Cyclone II FPGA have been configured? Or the Cyclone II FPGA will be reset in this case? T...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
19 years ago

To answer your direct question, after configuration the nCE pin will act like a Chip Enable.

If Low, then the chip will function externally as desired.

If High, then the I/O of the most likely Tri-state, and the internals will pause.

I do not think that the internals will Reset (and require a reconfiguration), which is what I believe your question is asking about.

If you have an eval board, I suggest you give it try.