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Altera_Forum
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16 years ago

Error in JTAG chain before reprogramming

I'm trying to reprogram a MAX II CPLD with USB Blaster in JTAG mode. When I click Auto Detect appears error message “Unable to scan device chain. Can’t scan JTAG chain.” Testing JTAG chain with...
Altera_Forum's avatar
Altera_Forum
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16 years ago

I attach images of JTAG signals captured with an oscilloscope before programmer’s interruption. Do you have any hint? :confused:

Thanks

Fabio