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Honored Contributor
Honored Contributorabout the CONF_DONE in the PS configuration
Dear all, I am trying to configure the Cyclone III device using the Passive Serial mode. In the very beginning, I draw the nCONFIG low, and subsequently the Cyclone III draw the nSTATUS low....the qu...
Altera_ForumHonored Contributor
Honored Contributor --- Quote Start --- currently, everything goes fine, except that when I send out all the configuration file in .hex format, the conf_done is still low................... --- Quote End --- What does the nSTATUS pin do? If it goes low, it indicates that the configuration file is 'bad'. This can happen if your PS controller has a logical error, or if there are reflections on the DCLK signal that cause the FPGA to be double clocked. Have you checked with JTAG that the FPGA can be programmed correctly. Does the CONF_DONE signal assert? Is this a BGA package, or a TQFP? Can you probe the pins directly? Cheers, Dave
