Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

JTAG configuration protocol specification

Hello, We're in the process of debugging a JTAG configuration problem (Quartus doesn't recognize the chain that consists of a single CycII device). We try to look at the TDI, TMS, TCK, TDO line...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

If you have done any soldering rework, it is possible that some residual soldering flux is creating electrical problems to the JTAG signals, it is a typical problem. If it is the case, try to accurately wash the board with a solvent.