The EVM has a built-in USB interface based on the MSP432E401Y (U3) to allow the GUI, from the host computer, to communicate with the PMIC. The supply voltage required by the MSP432E401Y is generated automatically by the TLV73333PQDRVRQ1 (U12) and TLV73318PQDRVRQ1 (U13) devices which provides 3.3 V and 1.8 V from USB power, +VBUS. These voltages are available for supplying VIO for the PMIC (selectable from J33). Two SN74GTL2003 level shifters (U4, U6) are used in order to support the use case of the PMIC VIO of 1.8 V (the MCU IO is 3.3 V). In addition to the level shifters, the TS3A5018RSVR (U8) switch is used to apply the pullup voltages to the I²C lines only when the EVM is configured as controller (J17). Additional TS3A5018RSVR (U9) switch is used for SPI enable/disable. The EVM has 4 LEDs to indicate board power, on or off, and some pre-defined PMIC GPOs status. The signals are listed in Table 3-8.