Mega 2560 5V/16Mhz -----> 3,3V/8Mhz

Posted by Blueble35 on Thu 31 Aug 2017 12:37 PM — 2 posts, 15,379 views.

#0
Hello
For several day, i try to prog an ATmega2560V-8AU with external murata ceramic resonator CSTCE8M00G55-R0 for many reasons ( energy, compatibility sensor.....)
I'd like to prog it as the mini pro 16Mhz and 8Mhz.

How i can do?
I try to change in board.txt the frequency of the cpu and the speed baud.
I try to change the bootloader by an other one that i find on sparkfun.

Someone have got a solution?
Thank you and sorry for my english,
I hope you understand?
Bye
Australia Forum Administrator #1
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