User manual

F1 LV Evaluation Platform User’s Guide
DS41614A-page 18  2011 Microchip Technology Inc.
2.5 POWERING WITH THE ADD-ON EXPANSION HEADER J3
The add-on expansion hardware will supply the F1 LV Evaluation board with 3.3V DC
through use of a linear regulator. This allows the 5-12V motor power supply to power
the PIC16LF1947. J3, pin 6, is the source for the 3.3V power. To use this power
perform the following steps.
1. Make sure a jumper or an ammeter is connected across J4.
2. Verify that any attached PICkit 3 is not supplying power.
3. Populate the EXP PWR jumper, J6.
4. Attach the add-on expansion board.
5. Connect power to the add-on expansion board.
FIGURE 2-4: EXPANSION SLOT POWER
2.6 POWERING WITH A AAA BATTERY
To power with a single AAA battery, the MCP1640 Boost Regulator is used to take the
supplied 1.8V and convert it to 3.3V.
1. Make sure the jumper or an ammeter is connected across J4.
2. Insert AAA battery into B1 battery clip.
3. Populate AAA BATT jumper, J7.
FIGURE 2-5: POWERING FROM BATTERY