Forum Discussion
Altera_Forum
Honored Contributor
Honored Contributorunexpected CPU/hardware reset
We have a board custom based on a cyclone III and everything has been working well for months. In a recent batch of boards we received, however, occasionally the system seems to unexpectedly reset. I...
Altera_ForumHonored Contributor
Honored Contributor --- Quote Start --- It seems that the boards which displayed this problem had Cyclone processors which went from a 65 nm to a 60 nm process. When we downgraded our clock rate for the SDRAM the problem went away. --- Quote End --- Do you use TimeQuest for timing analysis? If not, you should perform a timing analysis with both boards. Ideally the change in process should be reflecting in the change in FPGA timing. You should be able to get both boards operating with the same SDRAM clock frequency, but you might need to adjust output timing to different 'optimal' values for each board type. Cheers, Dave
