USB Power Supply

The USB only acts as a 5 VDC power supply for the board, no data communication on the cable. The 5 VDC supply the MCU and the system directly.

Table 1. Pin Definition of the USB Socket
Pin Name Connection
1 Vbus 5V power supply
2 D- NC
3 D+ NC

The USB power supply requires the standard power with voltage tolerance from 4.85V to 5.25V. The power consumption of the board is quite low for the USB port. Any USB port with 100 mA or higher output capability can power the board.

The USB socket supports the micro-USB cable only. The connection is shown in the figure below.

Figure 1. USB Power Supply to the Board
Figure 2. Schematic of the USB Socket