3.1 Power Supply

The RNWF02 Add On Board can be powered using any of the following sources, depending on the use case scenario, but the default supply is from the host PC using a Type-C USB cable:

  1. Type-C USB supply – Jumper (JP200) is connected between J201-1 and J201-2 to supply using Type-C USB cable.
    • The USB supplies 5V to Low-Dropout (LDO) MCP1727 (U200) to generate 3.3V supply for VDD supply pin of RNWF02PC Module.
    • VDD supply derives VDDIO supply to the RNWF02PC Module.
  2. Host board 3.3V supply – Jumper (JP200) is connected between J201-3 and J201-2.
    • The host board supplies 3.3V power through the mikroBUS header to the VDD supply pin of the RNWF02PC Module.
    • VDD supply derives the VDDIO supply to the RNWF02PC Module.
  3. (Optional) Host board 5V supply – There is a provision to supply 5V from the Host board with rework (populate R244 and depopulate R243). Do not mount jumper (JP200) on J201 when the host board 5V supply is used.
    • The Host board provides 5V supply through the mikroBUS header to the LDO regulator (MCP1727) (U200) to generate 3.3V supply for VDD supply pin of the RNWF02PC Module.
    • VDD supply derives the VDDIO supply to the RNWF02PC Module.
Mount the jumper JP200 on J201 for Power selection between the USB power supply or the 3.3V from the mikroBUS interface.
Table 3-2. Jumper JP200 on J201 for Power Selection between USB Power Supply or the 3.3V from the mikroBUS interface
3.3V Generated from USB Power Supply 3.3V from mikroBU Interface
JP200 on J201-1 and J201-2 JP200 on J201-3 and J201-2

The following figure illustrates the power supply sources used to power the RNWF02 Add On Board.

Figure 3-2. Power Supply Block Diagram