6 USB Connector
The UNO R4 Minima has one USB-C® port, used to power and program your board as well as sending & receiving serial
communication.
Note: You should not power the board with more than 5 V via the USB-C® port.
7 Digital Analog Converter (DAC)
The UNO R4 Minima has a DAC with up to 12-bit resolution attached to the A0 analog pin. A DAC is used to convert a
digital signal to an analog signal.
8 Power Options
Power can either be supplied via the VIN pin, the barrel jack, or via USB-C® connector. If power is supplied via VIN, the
ISL854102FRZ buck converter steps the voltage down to 5 V.
The VUSB, barrel jack connector 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 microcontroller.
8.1 Power Tree
Arduino UNO R4 Minima power tree.
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