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Altera_Forum
Honored Contributor I
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CycloneIII Development Board Can't Access JTAG Chain

Hi, 

After I loaded with my flash file with JTAG programmer, the CycloneIII development can not be programmed anymore. QuartusII programmer AutoDetect Button returns error: 

Can't Not Access JTAG Chain, 

Operation Failed. 

If using JTAG mode with USB-Blaster. 

 

Instructions and help to reconfigure the unit is needed. 

Thank you, 

David
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