rmortyh:
Hello-
I am using a Due connected to a processing program and I'm using 1843200 baud which is working nicely. I am pretty sure this limitation is in Processing. (Java). If I try to go faster I get a Java error. But, it's working fine at this speed.=Rich
I somehow doubt this incredible number unless there is a typo with some extra '0' digit.
It seems there is no confirmed specification on this subject, so maximum stable speed is sort of 'gray area'.
I can get transmit rate of 250000 (Putty)