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Altera_Forum
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17 years ago

MAX II TDO Problem

Hello! I use EPM2210GF256. It seems, like it's TDO signal is constantly in high- Z. Of course, i cannot connect to the device with JTAG. I can see voltage around 300-400 mV on the TDO net ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

Oh, i know what was that.

The device's grounds were disconnected from board's common GND plane.

Thanks anyway!