Originally Posted by Gadorach
I'd assume the voltage difference is due to many modern chips being able to push different voltages over certain pins depending on the configuration. As only the chip itself would need the +5v, it would have had +3.3v over all the other internally configured IO pins. But what do I know, I've never worked with an ATMEL chip before.
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That's what you need the voltage regulator for (or an external 3.3V supply). When Teensy is running on 5V, it outputs 5V on the i/o lines as well.
Originally Posted by Gadorach
On the topic of lifting the chip, I most certainly would, if I had a reader for them. But alas, as I do not, I have to use these methods. Now, don't get me wrong, I'm not saying these are inferior by any means, just that they take more work to, well, make them work. I'll try again, including a complete rewiring of the chip, and report my findings in a few hours. Hopefully that will solve the problem.
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You have a reader: Teensy.
Seriously, the problem here isn't the nor itself (unless it's damaged) or the flasher (unless it's buggy
), but the fact that we do in-circuit-programming. If you lift the chip and connect it to teensy, it'll probably work right away.
-- judges