SLVUCU6A November 2023 – October 2024
The default settings for communication with the PMIC is I2C. Changing to SPI requires a minor change to the jumper settings. These jumper settings are highlighted in red in Figure 2-3. The first jumper to place is on the SPI_EN option on connector J20. Placing this jumper connects the microcontroller to the SPI bus, which is connected to the PMIC. The other two jumpers that need to be connected are GPIO1 to SDA2/SDO on J20 and GPIO2 to SCL2/CS0 on J25. These jumpers connect the CS and SDO signals from the MCU to the GPIO pins of the TPS6522x through a level shifter.