RTL8773E Motherboard User Guide
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Figure2-1 Power Jumper Connection
2.2.2 LDO_AUX Setting
8763E LDO_HV33 (VDDIO0) is 3.3V fixed, and it is marked as VDDIO1 or VIO1
on EVB motherboard. LDO_AUX (VDDIO1) is 1.8V by default, and it is marked as
VDDIO2 or VIO2 on EVB motherboard. LDO_AUX voltage is adjustable and the
customer is allowed to adjust LDO_AUX voltage using McuConfigTool.
There are some tips about LDO_HV33 & LDO_AUX:
1. VDDIO_FLASH is powered by LDO_HV33, which is used to supply power for nor flash.
Internal flash requires power supply of 2.7V~3.6V range, so LDO_HV33(VDDIO1) is 3.3V
fixed. VDDIO1/VIO1 on EVB board is 3.3V fixed.
2. LDO_AUX can be adjusted to be 1.8V and 3.3V by McuConfigTool. VIO2/VDDIO2 on
EVB is 1.8V/3.3V selectable.
3. For application, IOs belonging to different power domains (LDO_HV33/LDO_AUX) have
different voltage selections as follows. When connecting external devices with 8763E IOs,
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