GPIO1 -n12 of TPS65950 power management is connected to LDO_EN of TPS2141pwp which provides AUX_3V3 . AUX_3v3 Required for D5 POWER LED, DVI-D and UART Interface (RS232). AUX_3V3 can be turned off by Activating GPIO1 on TPS65950 to 1. Activation of the GPIO1 on TPS65950 to 1 can be done using I2C interface available on TPS65950.
