Hi, I have included a Mega 2560 on a pcb design for my project and all is good apart from serial comm. I am communicated with other devices on the serial line and there is no synchronisation.I altered to baud rate on my project to be twice as fast as the the receiving devices and that did work although i dont want that long term.
The speed of my mega is set o 1mhz as default programming using Atmel studio. I have the 8mhz internal clock running but I want to use 16mhz external oscillator. Has anybody done this or know the best process/ practices please? Fir instance, which LOW.SUT_CKSEL to select?