Power; Power Supply Options; Figure 8. Power Supply Options - Renesas RA8 Series User Manual

Renesas RA Family

5.1 Power

The EK-RA8M1 kit is designed for +5 V operation. An on-board Low Dropout Regulator (LDO) is used to
convert the 5 V supply to a 3.3 V supply. The 3.3 V supply is used to power the RA MCU and other
peripheral features.

5.1.1 Power Supply Options

This section describes the different ways in which EK-RA8M1 kit can be powered.
Option 1:
Debug USB
(J10)
Option 2:
USB FS
(J11)
Option 3:
USB HS
(J31)
Option 4a:
J60
Option 4b:
TP7 and TP9
5.1.1.1 Option 1: Debug USB
5 V may be supplied from an external USB host to the USB Debug connector (J10) labelled DEBUG1 on the
board. Power from this source is connected to the main system 5 V power. Reverse current protection is
provided between this connector and the main system 5 V power.
5.1.1.1 Option 2: USB Full Speed
5 V may be supplied from an external USB host to the USB Full Speed connector (J11) labelled USB FULL
SPEED on the board. Power from this source is connected to the main system 5 V power. Reverse current
protection is provided between this connector and the main system 5 V power.
5.1.1.2 Option 3: USB High Speed
5 V may be supplied from an external USB host to the USB High Speed connector (J31) labelled USB HIGH
SPEED on the board. Power from this source is connected to the main system 5 V power. Reverse current
protection is provided between this connector and the main system 5 V power.
R20UT5149EG0100 Rev 1.00
Oct.03.23
3.3 V Voltage
Main System
Measurement:
5 V Power
TP8 and TP10
5 V to 3.3 V
Voltage
Regulator

Figure 8. Power Supply Options

EK-RA8M1 v1 – User's Manual
Main System
3.3 V Power
MCU Current
Measurement
(R3) TP1 and TP3
USB Current
Measurement
(R2) TP2 and TP4
Main
Power
RA
MCU
USB
Power
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