Yes, please dont connect VBUS_IN_DISCHARGE when you have VDDD connected to externally and disable the regulator.
All the I/Os will be powered form VDDD in that case including VBUS_C_CTRL. You could connect VBUS_C_MON_DISHARGE to the VBUS on the Type-C connector to monitor it. Please refer to Figure 9 in the datasheet for power bank application, it shows an example of the device being powered from VDDD when acting as a sink.
Thank you for your reply.
If VBUS_IN_DISCHARGE connect external when it have VDDD supply, what is occured fatal problem?
It is connected to VBUS_IN_DIS at current board.
If you connect both VDDD and VBUS_IN_DISCHARGE, you will be shorting the output of the internal regulator to your external supply and back powering it and it might damage the chip. When the external VBUS_IN_DISCHARGE is connected, the regulator generates 3.3V on the VDDD pin so it shouldnt be used as an input.
Thank you for your reply again.