3.4 Power Supply

The WINCS02 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 board 3.3V supply using mikroBUS™ socket:

  1. 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 WINCS02PC Module.
  2. (Optional) Host board 5V supply – There is a provision to supply 5V from the Host board with rework (populate R244 and depopulate R243). When using the host board 5V supply, do not mount jumper (JP200) on the supply selection header (J201).
    • 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 WINCS02PC Module.
    • VDD supply derives the VDDIO supply to the WINCS02PC Module.

The following figure illustrates the power supply sources used to power the WINCS02 Add On Board.

Figure 3-4. Power Supply Block Diagram
Note:
  • Remove the supply selection jumper (JP200) present on the Supply Selection Header (J201) and connect an ammeter between J201-2 and J201-3 for external supply current measurement.