Board And Connectors > 37-Pin Connector X2 > Power

The USB specification allows to draw 500 mA from the USB power line. The power consumption of the USC-2 depends on several conditions and can exceed significantly this upper limit. Although the most USB host systems allow to draw much more power over the USB line, this mode should be only used for test and evaluation purpose. Next to the allowed power rate only shorter USB cables should be taken in account since due to the cable resistance the available voltage on the board itself could go below internal allowed values.