The 280x and 283x DSCs ca be waken up from halt mode on alle gpio pins on
port A, but do anyone know if the controller also knows which pin signal has
waken it up ? In my previous project I used the 2812 and had to connect an
external io-expander to handle wakeup from 4 external interrupt sources and
to find out which interrupt it was.
I hope this is not necessary on the 280x and 283x. I plan to use the new
28335 in my new project.