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Altera_Forum
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16 years ago

Error: Can't access JTAG chain

When i try to program the FPGA cyclone III i get this error : error: can't access jtag chain error: operation failed. I am using a FPGA cyclone III .I would be able to program it a few months...
Altera_Forum's avatar
Altera_Forum
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15 years ago

HI ,the same problem puzzled me now, and i don't know where the wrong is. The pcb is also a finished product,when i download the program by jtag, it gives the error "can't access the jtag chain"

The 50MHZ crystal's output is between 1.2v-2.2v. Whether the source is right?