I am designing a project with a atmega 2560 with a minimal footprint on a PCB, so i figured i could use the Arduino as ISP feature and program the chip via an ICSP breakout. I used the Arduino Mega 2560 reference design to design the board. I'm 90% sure the oscillator oscillating, everything is gett…

Factory Atmega 2560 unable to upload

system May 11, 2018, 11:27pm 2

Lots of missing info here... You never said you installed a bootloader. Please detail all the steps you’ve done or at least confirm the bootloader flashed okay.

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Factory Atmega 2560 unable to upload

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