Atmel SAMC21 5v I/O ?

Hi Guys,
I found that the Atmel SAMC21 MCU series based on the ARM M0+ could be operated between 2.7V and 5V. Does this mean that I can power it with 5V and the digital and analog outputs will go up to 5V or is it just a power functionality and the outputs will still be capped at 3.3V?
Thank you for your help!

SamC powered at 5v should be able to do 5v IO...