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RL78/G22 Fast Prototyping Board
Figure 5-7 Setting of the Header to Select Supply from the Emulator or External Power (Top Side)
5.16
External Power Supply
When the evaluation MCU is to have a desired power-supply voltage, or when more current is required, use
an external power supply. The usable voltages depend on the evaluation MCU.
Destinations for the connection of an external power supply:
VDD: pin J18-1 on the external power-supply header
•
VSS: pin J18-2 on the external power-supply header
•
Figure 5-8 shows the positions of the external power supply.
When an external power supply is used, confirm that the I/O voltages for Arduino
modules, or Grove modules are correct.
Pin J18-1 (VDD)
Figure 5-8 Positions of the Destinations for Connection of an External Power Supply (Top Side)
R20UT5121EJ0100 Rev. 1.00
Nov.16.22
Power-supply
selection header (J17)
Open-circuit:
emulator or external
power
5. User Circuits
shields, Pmod
Pin J18-2 (VSS)
Page 22 of 35
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