Realtek Semiconductor RTL8773E User Manual page 16

we should match power voltage of device with IO voltage.
IO Group
P0_x
P1_x
P2_x
P3_x
For example, when using P0_0/P0_1 as data uart, we need to connect with USB to UART
converter. We should pull off power jumper on FT232 converter, and connect VDDIO to
LDO_AUX which is marked as VDDIO2 on EVB board.
For example, when downloading image using on board FT232, short FT_VIO with VIO1, as
P3_0, P3_1 belong to LDO_HV33. When receive log using on board FT232, short FT_VIO
with VIO2, and make sure M3_0 is not connected with FT232. Otherwise, LDO_AUX may
be damaged.
·Copyright 2019 Realtek Semiconductor Corporation.
IC power domain EVB mark
LDO_AUX VDDIO2
LDO_HV33 VDDIO1
LDO_AUX VDDIO2
LDO_HV33 VDDIO1
All Rights Reserved.
RTL8773E Motherboard User Guide
Voltage
1.8V/3.3V
3.3V
1.8V/3.3V
3.3V
14