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Altera_Forum's avatar
Altera_Forum
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11 years ago

problem with JTAG configuration cyclone III

Hi, I am using cyclone III, epc3c10k. I have a problem of configuration from JTAG using usb blaster. Where I try to programming from quartus the JTAG can’t work. I connected the ncomfig, ...
Altera_Forum's avatar
Altera_Forum
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11 years ago

I don't believe the lack of connection to the exposed pad will prevent a correctly powered device from being discoverable via JTAG.

I do base this on experience and a board we successfully had working, despite the lack of thermal pad on the PCB. This was using a Cyclone IV device. It could be that the thermal pad is connected differently internally to that of Cyclone III devices. However, I doubt it.

Some of the voltages you're reporting seem a little strange too based on how you are powering the device. Unfortunately, I think this is more likely to be damage to the device. Sorry.

Cheers,

Alex