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Altera_Forum's avatar
Altera_Forum
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16 years ago

FPGA is hot

I'm using EP1C6Q240 FPGA, after programming it , the current for 3V3 was about 400mA, working OK, after several weeks, the current went to about 800mA and FPGA was getting hot, but it's still working...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

The reason was found, it's because we connected VCCA_PLL1 and VCCA_PLL2 to 3.3V. according to data sheet, this was wrong, those VCCA pins should connect to 1.5V.

After doing that, the FPGA is cool now, the problem is the FPGA cannot be programmed. if I changed VCCA back to 3.3V which was wrong, it could be programmed and then became hot again. I don't know why this happens.