Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

Config issue Cyclone IV (EP4CE6U14I7N)

We have problems to get a new design configured. The programmer (PC application launched from Quartus II) tells that we succeed, but CONF_DONE is not released on the target. JTAG and AS-mode ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

What else have you got connected to CONF_DONE? Is anything else holding it low? The FPGA will not start until CONF_DONE is released, whether the FPGA's internal state machine is holding it low or external circuitry.

When you say AS is reported as successful, what are you doing exactly? Programming the serial flash via JTAG? Can you program the serial FLASH device?

I suggest you focus on configuring the FPGA directly using JTAG mode until something is working.

Check all your power rails and ensure that all power pins are connected correctly. Expect strange behaviour if one power pin is not connected correctly.

Cheers,

Alex