3.1 Power Supply

The WILCS02-SD 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 using the SD/MMCplus Connector or from a PC using a USB Type-C® cable:
  1. Host board SD 3.3V supply:
    • Place the jumper between J203-1 and J203-2 for the 3.3V VDD supply and between J204-1 and J204-2 for the 3.3V VDDIO supply to power the module using the host board via the SDIO interface.
    Figure 3-2. Power Supply Block Diagram
  2. USB Type-C supply (J200):
    • The debug USB (J200) supplies power to the WILCS02-SD board from the host PC using Type-A male to Type-C USB cable.
    • Place the jumper between J203-1 and J203-2 for the 3.3V VDD supply and between J204-1 and J204-2 for the 3.3V VDDIO supply to power the WILCS02PE module.
    Note: The maximum available current from the debug USB (J200) is limited to 500 mA.
  3. External 3.3V Power supply:
    • Place the jumper between J203-2 and J203-3 for the 3.3V VDD supply and between J204-2 and J204-3 for the 3.3V VDDIO supply to power the WILCS02PE module using an external power source.
    Note: The operating voltage range for VDD and VDDIO is: 3.0-3.6V (3.3V Typical).
Table 3-2. Power Selection
Power Supply Signals3.3V Generated from Host Board Power Supply3.3V Generated from USB Type-C® Supply3.3V Generated from External Power Supply
VDDJP200 on J203-1 and J203-2JP200 on J203-1 and J203-2JP200 on J203-2 and J203-3
VDDIOJP201 on J204-1 and J204-2JP201 on J204-1 and J204-2JP201 on J204-2 and J204-3
Note: When the WILCS02-SD board is plugged into the host board SD/MMCplus Connector and the USB Type-C cable is plugged into J200, the 3.3V supply is derived from the 5V USB supply.