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Altera_Forum
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13 years ago

MAX V "Jtag chain problem detected"

Hello I build a testing device - another one (first works fine). One of the testing steps is programming CPLD Max V 5m80z. All signals have been connected but I have a problem. I tested connect...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

Yes, I found the issue. The ground signal in my PCB is not got. I mean the routing is bad, not the connection. There is quite big current flowing through ground line which goes to JTAG connector from others parts on PCB. I cut this path and connected programmer directly by bypass (simple wire). It works perfectly. :)