ISR trigger modes (conflicting information)

Projects Programming
1

Regarding ISR triggers:

LOW a low level trigger
CHANGE a change in level trigger
RISING a rising edge of a level trigger
FALLING a falling edge of a level trigger

it is declared in the Arduino Playground's ArduinoSleepCode that:
"In all but the IDLE sleep modes only LOW can be used."

Yet, in Nick Gammon's sleep code (sketch J), which I have confirmed works... it is using FALLING during POWER DOWN sleep mode.

What's the deal with this conflicting information?
I spent about 15 minutes looking for an answer in the ATMega328P's data sheet but didn't have much luck. I was hoping someone here could explain.

Thanks.

2

http://forum.arduino.cc/index.php?topic=179873.0

3

Thanks!
Looks like it was an error in the data sheet:

But I'll probably be sticking with a LOW trigger, considering:

and I may be wanting to use that chip.

Any idea why Gammon prefers FALLING over LOW ?

4

I assume it is because LOW is a continuous fire interrupt. As long as the pin is LOW the interrupt will continue to fire (unless you disable the interrupt or communicate with whatever is holding the pin low to stop).