RTL8762D Evaluation Board User Manual
Copyright 2021 Realtek Semiconductor Corporation. All Rights Reserved.
8
1.2.3 Power supply
1)
Mark 10
: Power supply selection module of motherboard, shown in Figure 1-4.
Figure 1-4 Power jumper
a)
3V3
：
Powered by USB power source on evaluation board, IC voltage 3.3V.
b)
VCR2302: Powered by a CR2302 battery (on the rear)
c)
2V5
：
Powered by USB on evaluation board, IC voltage is 2.5V, generally used while burning eFUSE.
2)
Mark 21
: CR2032 battery holder (at the bottom side of PCB)
3)
Mark 15
: Li-ion battery holder: evaluation board can be powered by Lithium-ion battery.
Note: If EVB is powered by Li-ion battery, jumper cannot be put on mark 10.
4)
Mark 13/14
: AMS1117 3.3V output and AMS1117 2.5V output LDP chip that provide 5V to 3.3V and 5V to
2.5V voltage conversion circuit when EVB is powered by Li-ion battery.
5)
Mark 9
: Power G-sensor and SWD VCC. This jumper must be connected during normal operation.
6)
Mark 8
: Jumper for RTL8762D overall power consumption test. Remove J23 and cascade with an ammeter
when performing overall power consumption test.
Note:
a)
J23 must be shorted during normal operation.
b)
When performing current measurement, LOG printed must be disabled. UART should be left not
connected and disconnect SWD with debugger to avoid affecting measurement.
c)
Under some special circumstance that current measurement at 3V needs to be performed, replace
onboard power supply with external 3V DC power supply.
7)
Mark 12
: Micro USB 5V power supply. It can be connected to either external 5V power supply or USB port
of PC.
8)
Mark 4
: GND jumper.
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