UC-08-M31 EN P1.0.3 Power Supply 7
3.1 3.3V LDO Power Supply
VCC outputs 3.3 V voltage after passing through the LDO circuit to provide power to
UM982-EB.
Figure 3-3 3.3V LDO Circuit
Notes:
The rated output current of LDO should be more than twice the maximum operating
current of UM982.
R32 is a series resistor placed at the input of the LDO, which is used for debugging. When
selecting the resistor, choose one with high rated power to ensure the current capability.
Here, a 0805 0-ohm resistor is selected.
R33 is a resistor connected in parallel with LDO. After removing R32 and soldering R33,
you can use VCC to power the module.
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