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Altera_Forum's avatar
Altera_Forum
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10 years ago

program/erase MAX II with TDO disabled?

I think I messed up and bricked my board, but I'm open to ideas. Here's the scenario: My board uses the EPM240 in the 100-pin micro BGA package. There are no other JTAG devices in the chain, ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

I'm afraid you're stuck. You could tri-state the GPIO pin if you had reliable access to JTAG, although I don't know how to, or even if you can with Altera's tools. Standard boundary scan tools, such as XJTAG, allow you to manipulate the I/O pins and more, including reprogramming the device with a design that doesn't drive that GPIO pin. This would allow you to regain access to your device - providing the TDO driver isn't damaged.

However, these 3rd party tools rely on JTAG access, which is compromised on your board.

Cheers,

Alex