Power Supply Options; Power Supply Considerations; Power-Up Behavior; Figure 6. Power Supply Options - Renesas RX600 Series User Manual

Renesas RX Family

5.1.1 Power Supply Options

This section describes the different ways in which CK-RX65N kit can be powered.
Option 1:
Debug USB
(J14)
Option 2:
USB FS
(J13)
Option 3:
External
Power Input
(J17)
5.1.1.1 Option 1: Debug USB
5 V may be supplied from an external USB host to the USB Debug connector (J14) labelled USB DEBUG 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 2: USB Full Speed
5 V may be supplied from an external USB host to the USB Full Speed connector (J13) labelled USB FS 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.
5.1.1.3 Option 3: External Power Input
5 V may be supplied from an external power supply or battery to 2-pin header J17 labelled EXT BATT on the
board. Polarity is J17-2 (+5 V) and J17-1 (GND). Power from this source is connected to the Main System
5 V Power. Reverse current protection is provided between the 5 V test points and the Main System 5 V
Power.

5.1.2 Power Supply Considerations

The on-board regulator which supplies +3.3 V has a built-in current limit of 2.0 A and the regulator which
supplies +1.8 V has a built-in current limit of 150 mA. Make sure that the total current required by the RX
MCU, any active on-board features, and any connected peripheral device does not exceed these limits.
Note: The total current available from a typical USB host is 500 mA maximum. Depending on the
configuration of the kit, multiple power sources may be required.

5.1.3 Power-up Behavior

When powered, the white LED near the center of the board (the "dash" in the CK-RX65N name) will light up.
For more details on initial power up behavior, see the CK-RX65N Quick Start Guide.
R20UT5100EG0100 Rev. 1.00
May.17.22
Main System
5V Power
5V to 3.3V
Voltage
Regulator

Figure 6. Power Supply Options

CK-RX65N v1 – User's Manual
3.3V Voltage
Main System
Measurement
3.3V Power
(J2)
Temperature and
Biometric Sensor
Air Quality Sensor
3.3V to 1.8V
Regulator
Pressure
RX MCU
Humidity Sensor
Motion
Sensor
Sensor
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