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Altera_Forum
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17 years ago

Can not dowload the code into my Altera

I met a weird problem: I can download the code into my Altera chip EPM240T100 comfortably at the first time. But, I can not download the code again. The errors are: Error: Can't access JTAG cha...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

Measure your power supply voltages and make sure they are what they should be. Could be an I/O pin is driving vcc and the pin is connected to gnd or the I/O pin is driving gnd and the pin is connected to vcc.

May not be the problem but worth ruling out.