Initial operation with the MSP432E401Y LaunchPad requires downloading pre-configured firmware into the MSP432 in order to be recognized by the GUI. See Section 3.1.2 about how this firmware must be accessed by installing the GUI for offline operation.

1. Once downloaded, the MSP432 firmware file, acctrl_4_18.bin, can be found at:{Installation Directory}\install_image_TPS6503xx-Q1_GUI.zip\TPS6503xx-Q1_GUI\app\firmware
2. Install UniFlash, a free firmware flashing tool from TI.
3. Connect the LaunchPad to the PC. Use the USB port on the MSP432E401Y LaunchPad that is opposite the Ethernet port.
4. Run UniFlash. The program should automatically detect the connected MSP432E401Y LaunchPad. Once detected, click Start.
   Figure 3-4 UniFlash Initial Setup
5. On the next page, browse to the binary file downloaded in Step 1 and click Load Image.
   Figure 3-5 UniFlash Load Firmware Image
6. If prompted, update the XDS110 Debugger firmware. After accepting the update, UniFlash will update the firmware automatically and continue to load the binary image. The console will indicate a successful program.
   Figure 3-6 UniFlash Successful Program
7. Unplug the micro USB cable from the MSP432E401Y LaunchPad.
8. Now plug the USB cable in to the micro USB port adjacent to the Ethernet port.
9. Install jumper on pins 3-4 (USB-OTG) of JP1 to supply the target 5 V supply through USB.

After completing this process, the GUI will recognize the LaunchPad as a USB-to-I2C interface. Next, stack the BOOSTXL-TPS65033 on top of the MSP432E401Y LaunchPad. The headers should align according to Table 3-1.

Note there may be two separate interfaces (or COM ports) recognized by the GUI. If one is failing to connect, use the GUI to switch to an alternate port.

1. Click the Options menu at the top of the GUI, select Serial Port.
   Figure 3-7 Serial Port Options

2. Use the Ports dropdown to select the alternative interface.
   Figure 3-8 GUI Serial Port Selection
3. The GUI will indicate a successful connection through the black connection toolbar.