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Honored Contributor
Honored Contributorfpga is configured successfully but cannot work
Hi all My project has two FPGAs and these two FPGAs can be configured separately via their JTAG headers. Besides, the two FPGAs shares an epcs in the multi-device AS configuration mode. ...
Altera_ForumHonored Contributor
Honored Contributor --- Quote Start --- 4) The AS configuration circuit is the same as Fig. 8-3 in Cyclone IV configuration handbook. Two FPGAs share a single sof file. (http://www.altera.com/literature/hb/cyclone-iv/cyiv-51008.pdf) --- Quote End --- Figure 8-3 shows a configuration scheme where the two FPGAs configure in sequence, i.e., there must be two files in the programming flash. They can be the exact same file, but there needs to be two of them. If you wanted the same file downloaded simultaneously, then you would need to have both chip-enables (nCE) grounded. If you are loading the serial flash with just a single image, then that is the source of your issue. Cheers, Dave
