Forum Discussion

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

Stratix III wierd JTAG Config problem

I've got 2 Stratix III devices in a JTAG chain. If I power the board, I can scan the chain OK and program repeatedly but as soon as I switch off the power and re-apply, JTAG no longer works. i...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

I think you need to read the latest datasheet from Altera.

Stratix III devices are 3.3V I/O standard compatible. They were initially specified as not tolerant of 3.3V I/O standards (and required external protection if interfacing to such I/O) but the datasheet has since been updated (presumably following evaluation and testing of prototype devices).