Forum Discussion

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

JTAG Configuration problems

Hello, I work for a company who uses altera chips in one of their products. I was recently shown how to use a JTAG chain to program one of our boards with 7 chips on it. The demonstration went ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

Can you probe the JTAG pins on the devices in the chain?

For example, are all the devices BGA packages, with vias you can probe on the bottom?

What OS are you using the parallel port ByteBlaster on? I have a jtag_tester program that can be used to toggle TCK/TMS/TDI that you could use to generate activity on those signals, and then you can probe with a scope to see where things stop working.

Cheers,

Dave