We are using the PCA9450CHN PMIC and understand that it powers up with default regulator voltages, which can be modified through I2C programming. Could you please explain the complete sequence for changing these voltages after power-on, including when the SoC starts communicating with the PMIC? Also, please let us know the recommended debugger or tools to monitor and verify the PMIC register programming and voltage changes.
You can refer to above after the POR_B signal pull high and the PCA9450C enter into RUN mode you can change its power rails output value.