AVR Dragon -> ATtiny167 (3v3 power-rail)

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I've accidentally connect the 167 over to the 3v3 power-rail while having the programming cables connected to AVR Dragon's ISP socket. I've switched back to the 5v but still getting "Unable to enter programming mode...". Have I burnt the SCL/MISO/MOSI pins?

However, the chip is still performing the blinking of the LED on PORTA0 as in my test code. Is there anyway to salvage this chip?

Thanks.

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Once an engineer, forever an engineer

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Have you unplugged everything and started from the beginning? ie unplug Dragon, restart Studio, power down the target.

John Samperi

Ampertronics Pty. Ltd.

www.ampertronics.com.au

* Electronic Design * Custom Products * Contract Assembly

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Yeap, sure did. Did 3 times & results were the same. I have a spare ATtiny167 & tested on the AVR Dragon & it was good.

I scoped the MOSI pin & it seems I had fried it?

Top Pix of Bad ATtiny167

Bottom Pix of Good ATtiny167

:? No idea. Probably I'll need a voltage level translator if I do that again...

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Once an engineer, forever an engineer