5 Appendix A: WFI32E01 Carrier Board

The WFI32E01 carrier board is a plug-in board designed around the WFI32E01 Module. The carrier board brings all the signals from the module onto the Curiosity board for rapid prototyping. The WFI32E01 carrier board has an on-board crystal (32.768 kHz) for RTCC and a header (J102) for the current measurement (see Figure 5-1).

The current measurement header (J102) helps the user measure the total current consumed by the WFI32E01 Module using a multimeter. To measure the total current consumption of the module, remove the jumper from (J102) and connect a voltmeter across its pins 1-2. A 1Ω resistor (R101) available on the board across the jumper gives a 1:1 relationship between the voltage drop and current consumption.

For the direct current measurement, use a jumper wire to short (J102) pin 1-2, remove the (R101) resistor and current clamp probe (example, TEKTRONIX TCP0030A Current Probe). A normal probe with long wires may add a load to the current path and introduce a voltage drop, which leads to incorrect readings.

For the current measurement in terms of voltage, a resistor (R101) is provided on the board. The user can measure similarly using a voltage probe or multimeter across the resistor (R101).

The following table lists the details of the carrier board: