Multiple Interrupts support ATmega 2560 - IR and buttons wakeup

Projects General Guidance
1

Many years ago, I have made low power consuming project for 328p using IR on pin 2 to shut down and wake up device. It worked fine, however now I would try to use the same with 2560 with addition to shut down and wake up on a button press as well.

Since the previous version of the device and software was a hobby project many years ago, I'm quite a bit out of track. As far I can remember, 328p had only one supported interrupt from power down mode, however I have no idea about 2560.

Anyone had similar requirement and perhaps have some test code?

2

The 328 has 2 interrupts, the 2560 has 6 pins
Read all about it here

3

If at least two interrupt pins on 2560 can trigger wake-up from power-down mode, that would be all I need.

I'm not certain of the reason I remember only one interrupt pin (pin 2) on 328p was capable to perform that...

4

Both interrupts are able wake up from power down mode on 328P but only level change.