TI FPD-Link's SerDes back-channel can also be used to reprogram the PMIC EEPROM in a production setting. The default TPS65033000 power sequence requires the SEQ at logic high to enable Buck1, Buck2, and nRSTOUT on power-up. When the back-channel is established, the host can reprogram the PMIC as outlined in Figure 3-6.

Figure 3-3 Reprogramming the TPS65033000-Q1 with a Remote Deserializer

After the device EEPROM is reprogrammed, the device will automatically restart. Depending on the image sensor power sequence requirements, it can be necessary to disconnect one or more of the imager power rails during the programming process with 0-Ω resistors or open pads. These can be populated or shorted after the programming process to avoid providing the imager an invalid power sequence.