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Altera_Forum
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13 years ago

fpga 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_Forum's avatar
Altera_Forum
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13 years ago

Having two JTAG headers (one for each FPGA) isn't a problem, just not necessary, and in this case leaves more room for error. Dave is right about the order that the FPGAs need to be configured -- until the nCE of an FPGA is low, the FPGA can't be configured. Also, if the CONF_DONE signals are tied together, neither FPGA will enter "user" mode until both have been configured (if by JTAG, you'd have to load the first, then the second).