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Honored Contributor
Honored ContributorConfiguring 2 Cyclone III's from one EPCS16 Using 2.5V
Hello, My FPGA configuration signals an error by pulling the nStatus line down at the end of configuration and starting over (and over and over). 1. I am attempting to configure two EP3C4...
Altera_ForumHonored Contributor
Honored Contributor --- Quote Start --- 3. Init_Done is not valid unless nStatus is High. --- Quote End --- I believe I have already mentioned to you that this is an optional output, and as such it is meaningless until near the end of configuration. --- Quote Start --- 4. A Config Done Error is probably being signaled by the second FPGA and by checking the "Disable AS/AP mode CONF_DONE pin error check" check box, the nStatus will not see this and go High at the end of the configuration cycle. --- Quote End --- CONF_DONE does not signal errors, nSTATUS does. CONF_DONE is held low by the first device until it configures, at which point it remains low, because the second device is not configured. --- Quote Start --- 5. Programming via JTAG will not get things going if nStatus is indicating an error --- Quote End --- Can JTAG be used to program both devices at power-on? If so, then the issue is likely related to the EPCS configuration file contents. Cheers, Dave
