Datasheet

Pinouts

Power Pins

About half of the pins on the Trinket M0 are related to power in and out: 3V, USB, BAT and GND

BAT - This is a voltage INPUT pin, you can use it to connect a battery or other external power to the Trinket. It

has a Schottkey protection diode so it is completely separate from the USB power input/output. You can put 3V-

6V into this pin and it will be regulated down by the 3V regulator

USB - This is a voltage OUTPUT or INPUT pin - it is connected directly to the micro USB port +5V pin, so if you

are powering over usb, this pin will give you 5V out at 500mA+.

if you are using the Trinket as a USB host or

you have a good reason, you can put 5V

into

this pin and it will back-power the USB port.