Target devices with USB host require an
additional switch in the power supply system that turns on/off the power supply that is
connected to USB devices in USB host mode of the target MCU. USB host mode requires the
connection of an external power supply to be able to meet the USB specifications. For most
cases the power input via the EDBG USB interface will be sufficient but is not recommended
since it will only work if the input voltage is not at the lower end of the USB
specifications and if the USB device does not require a lot of power.Figure 2-11. Power
Supply Block Diagram for Boards with USB Host
The online versions of the documents are provided as a courtesy. Verify all content and data in the device’s PDF documentation found on the device product page.
