ATMEGA644PA DATASHEET PDF

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By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. I have been programming an ATMegaPA with avr-gcc and avrdude on linux for a little while with no problems.

ATmega644PA Datasheet PDF

Well until I decided to change some fuses. The chip would no longer communicate. I realized after that the problem may have been that I set the bits for external clock rather than crystal oscillator but even with using an ATTiny to generate a 1MHz signal to the proper pin on my Mega, I still get nothing.

Any ideas as to why atmega44pa chip is unresponsive? Could it ztmega644pa that using avrdude’s definition for the P version of the chip rather than the PA version is the cause?

And finally, What can I do to rescue my chip? Atmega644pz I be able to do that with an STK? Nope, your 0x63 setting on datasheet lfuse byte has selected the internal kHz oscillator as the clock source. This is nice and low power, but it means that your programmer likely isn’t clocking itself slowly enough to program your device.

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I’m not familiar with either avrdude or the STK, but this is where your problem is coming from.

Microchip Tech ATMEGAPA-AUR – PDF Datasheet – ATMEL & AVR In Stock |

However, it will be difficult for you to brick your chip, because you’ve got the STK, which datasyeet do high voltage programming and rescue it from most situations. As I’ve never used the device, I’ll defer to the many other threads where others have posted problems and solutions for AVR fuse settings. There’s also one here on Chiphacker see my comment.

Next time, this fuse setting calculator is a nice resource. It’s fantastic that you read the datasheet, and tried to calculate what you wanted yourself, but the tool makes it much easier. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. Home Questions Tags Users Unanswered.

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First, welcome to the site! I hope we can offer you a warm welcome, but your question might be a dupe.

ATMEGAPA-AU Microchip / Atmel | Ciiva

But, this is a different chip slightlydifferent fuse settings, and a different programmer, so I say we let it stand And I don’t have the rep to flag it.

BTW, what were the fuses set to before you made the change? Thanks for that fuse calculator link, a great resource indeed. Sign up or log in Sign up using Google.

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