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Arduino UNO R4 WiFi User Manual

Arduino UNO R4 WiFi
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Arduino® UNO R4 WiFi
15 / 23 Arduino® UNO R4 WiFi Modified: 26/06/2023
11 Power Options
Power can either be supplied via the VIN pin, or via USB-C® connector. If power is supplied via VIN, the
ISL854102FRZ buck converter steps the voltage down to 5 V.
Both VUSB and VIN pins are connected to the ISL854102FRZ buck converter, with Schottky diodes in place for
reverse polarity & overvoltage protection respectively.
Power via USB supplies about ~4.7 V (due to Schottky drop) to the RA4M1 MCU.
The linear regulator (SGM2205-3.3XKC3G/TR) converts 5 V from either the buck converter or USB, and provides 3.3
V to a number of components, including the ESP32-S3 module.
11.1 Power Tree
Arduino UNO R4 WiFi power tree.

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Arduino UNO R4 WiFi Specifications

General IconGeneral
Operating Voltage5V
Input Voltage6-24V
Digital I/O Pins14
PWM Pins6
Analog Input Pins6
Flash Memory256 KB
SRAM32 KB
EEPROM8 KB
Clock Speed48 MHz
Wi-FiYes
BluetoothYes
USB ConnectorUSB-C
Dimensions68.6 mm x 53.4 mm
DC Current per I/O Pin8 mA
UARTYes
SPIYes
I2CYes
CANNo
MicrocontrollerRA4M1 (Arm Cortex-M4)

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