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Altera_Forum
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12 years ago

JTAG programming successful but no output on hardware

I am using a Cyclone III EP3C10F256 device. When I connect the USB Blaster and run the JTAG programmer in Quartus, the programming is done with no error. The code is just written to tie a few outputs...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

I found the problem. The CONF_DONE pull-up resistor was connected to a 1.2V supply instead of 3.3V (which was the supply of the bank). Therefore, after the programming is finished, the FPGA still stays in configuration mode with 1.2V. I changed the pull-up voltage and the problem was solved. Thanks you very much for your help.