I have a couple of questions I am having trouble getting answers to from the local Atmel FAEs. Our software team is telling me that the DBGU serial port has an undocumented receiver timeout interrupt that is not disableable and can not be configured. They would like to use it, but they need a shorter timeout value. So they are asking for both the DBGU port for code booting and a standard UART port for application comms.
I can't find any info to support their contention that this interrupt exists. So I suspect that it is being emulated using one of the counter/timer channels. I would like to find out just what is going on with this "invisible" timeout interrupt since it may represent an easy way to emulate a timeout interrupt and make everyone happy.
Any really know what is going on with this? I don't know exactly what software they are using, but they have the IAR tools for the ARM.