In addition, X-200 AHRS device can be also powered from an USB port of a host computer. In this case the device is selecting power source as in the table below:
| +3.3V at VDD pin | USB Connection | Powering Source |
|---|---|---|
| present | no | VDD pin |
| present | present | VDD pin |
| no | present | USB port |
| no | no | no |