Critical connections for operating the socketed board are the 5 V rail, the 3.3 V rail, and the I2C pins. The remaining connections to the LaunchPad are left available for future experimentation. Note: I2C pull-ups must be pulled up to VIO. This can optionally be pulled up to 3.3 V (default) or an alternate rail through the J12.

By default, the 3.3 V rail must be present to power the VIO and GPIO pins to fully enable the PMIC. If evaluation without a PC is desired, both the 5 V and the VIO domains should be externally supplied. If VIO is supplied by a voltage other than 3.3 V, J12 should be left open to prevent potential current paths to the MCU 3.3 V. For most configurations, the PMIC can supply VIO when externally connected to an appropriate test point, for example the Buck 1 output if configured for 3.3 V, or the Buck 2 output if configured for 1.8 V.