Pixhawk 2 Aux inputs (encoder / RPM) - 5V tolerant?

Are the aux inputs (PWM / FMU IO 1-6) that can be used for RPM and wheel encoding 5V tolerant?

I know the main Pixhawk doco says they are, but the Pixhawk 2 doco from the site refers only to them being 3.3V PWM outputs, so it’s not clear.