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Altera_Forum
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18 years ago

Cyclone III AS configuration bizarreness

I am using a cyclone III (EP3C25F324C8N) with an EPCS16 configuration device. I am programming the configuration device through the FPGA with the serial flash loader. The problem is that the Cyc...
Altera_Forum's avatar
Altera_Forum
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18 years ago

Rob,

Did you ever find the root of your problem?

I am experiencing a similar behaviour. It is on a custom board based with a Cyclone I, 1C20 device. I am using the CFI flash/CPLD-based configuration controller reference design. I, too, am having an intermittent configuration issue which disappears when probing with a standard 10X scope probe or a logic analyzer probe. The problem reappears when using a FET probe with <1pF capacitance.

I started a service request regarding this issue but have received no useful information.

Thanks,

steve