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Altera_Forum
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10 years ago

Help with Altera Cyclone III AS configuration problems.

Hi, I've tried to make a development board for the Cyclone III, most of it works as far as I can tell without the FPGA. My problem is with the FPGA configuring after I have successfu...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

I'm seeing a couple of things:

JTAG is not used, and not disabled. This can cause the device to get into a funk.

TMS, TDI should be pulled to VCCA, TCK should be pulled to ground.

MSEL's should be tied to either VCCA (2.5V) or GND. You have it hooked up to 3.3V

More General debugging:

All all the power supplies up and at their nominal values?

Is The Active serial clock,Data and Chip select toggling at all?

If you can hook up a JTAG header, can you get a device id out of the part through JTAG?

Pete