I do not understand how programm my µC which is the ATMEGA64M1? I joined you two pictures of the datasheet. To programm the µC it seems that I need PB3, PB4 and PB5. But when I look the Pin configuration there is no SPI interface on those pins. So is it possible that without visible SPI interface, I can programm the µC ? There is also a note that explains that it is possible that all parts can be programmed without having an SPI interface... But it's a bit weird and I have to be sure !
Thank you very much and have a nice day !