Programming the PMIC in the production line flow can easily be made possible by including an interface to the I2C lines on the camera module PCB. During production, the camera module is connected to an external I2C controller to reprogram the PMIC.

Figure 3-2 Reprogramming the TPS65033000-Q1 with an External I2C Controller

The camera module I2C pull-up resistors needs to be unpopulated while the external I2C controller is connected to prevent applying the external pull-up voltage to the PMIC, serializer, and image sensor. Additionally, the SEQ pin is left floating to keep the regulators disabled when input power is applied during programming. Populate the I2C and SEQ pull-up resistors after completing the programming process and disconnecting the I2C controller.