See Figure 1-3 for jumper locations.
VSELThis jumper allows output voltage selection of either 3.3 V or 5 V. See Section 2 for details.
MODEThis jumper allows the selection of either AUTO mode or FPWM mode. In addition, by removing this jumper and supplying a clock signal to the SYNC/MODE test point, the device can by synchronized to an external clock.
ENThis jumper turns the device on or off. In addition, by removing this jumper and supplying a signal to the EN test point, the device can be controlled externally.