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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...
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Altera_Forum
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16 years ago

You can check the JTAG signals(TCK,TDO,TDI) first， and confirm if they are all ok or not.