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Altera_Forum
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13 years ago

Can cyclone III comes into the user mode if AP config failed?

Original tille: "Can cyclone III comes into the user mode if AP config failed?" I can't find the EP3C120F780I7N when scan the JTAG chain. I want to kown what happend when nSTATUS and CONF_...
Altera_Forum's avatar
Altera_Forum
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13 years ago

The FPGA should always answer on the JTAG pins, even if it failed during the configuration phase. Do you have pull-ups on nSTATUS, CONF_DONE and nCONFIG?

Do you have power to all the I/O banks, and all the PLL supplies? Can you check the soldering of the FPGA balls?