3.1 Power Supply

The RNWF11 UART to Cloud Add On Board can be powered using any of the following sources depending on the use case scenario:

  1. USB supplies power to the RNWF11 UART to Cloud Add On Board using a USB Type-C cable connected to the USB Type-C Connector (J1). The module and the peripherals are powered by 3.3V generated from the on-board 3.3V linear regulator.
  2. The RNWF11PC Module and the peripherals are powered by 3.3V at the power selection header (J5), the mikroBUS interface when plugged into a host board.

Power selection between USB power supply or the 3.3V from the mikroBUS interface is done by mounting a jumper cap JP1 on the power selection header (J5).

Table 3-2. Jumper Cap JP1 Position to Select Power Supply Using Power Selection Header (J5)

3.3V Generated from USB Power Supply

3.3V from mikroBUS™ Interface

JP1 on J5-3, J5-2

JP1 on J5-1, J5-2

Figure 3-2. RNWF11 UART to Cloud Add On Board Power Supply
Note: The user must not power the peripherals without powering up the RNWF11PC Module.