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‎content/Hardware Support/UNO/Whats-the-difference-between-UNO-R3-and-UNO-R4-boards.md‎

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@@ -62,205 +62,32 @@ Yes, if your sketch was developed using the [Arduino API](https://docs.arduino.c
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## Technical specifications comparison {#tech-specs}
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</style>
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<table class="tg"><thead>
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<tr>
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<th class="tg-8pu1" colspan="6"><span style="font-weight:bold;background-color:#F6F9F9">Board</span></th>
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</tr></thead>
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<tbody>
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<tr>
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<td class="tg-4bam" colspan="2"><span style="font-weight:normal;background-color:#FFF">Arduino UNO R3</span></td>
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<td class="tg-4bam" colspan="2"><span style="font-weight:normal;background-color:#FFF">Arduino UNO R4 Minima</span></td>
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<td class="tg-4bam" colspan="2"><span style="font-weight:normal;background-color:#FFF">Arduino UNO R4 WiFi</span></td>
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</tr>
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<tr>
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<td class="tg-8pu1" colspan="6"><span style="font-weight:bold;background-color:#F6F9F9">Microcontroller</span></td>
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</tr>
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<tr>
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<td class="tg-4bam" colspan="2"><span style="font-weight:normal;background-color:#FFF">ATmega328P</span></td>
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<td class="tg-4bam" colspan="2"><span style="font-weight:normal;background-color:#FFF">Renesas RA4M1 (Arm Cortex-M4)</span></td>
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<td class="tg-4bam" colspan="2"><span style="font-weight:normal;background-color:#FFF">Renesas RA4M1 (Arm Cortex-M4)</span></td>
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</tr>
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<tr>
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<td class="tg-8pu1" colspan="6"><span style="font-weight:bold;background-color:#F6F9F9">Radio Module (WiFi/Bluetooth)</span></td>
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</tr>
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<tr>
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<td class="tg-8d8j" colspan="2">No</td>
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<td class="tg-8d8j" colspan="2">No</td>
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<td class="tg-4bam" colspan="2"><span style="font-weight:normal;background-color:#FFF">ESP32-S3-MINI-1-N8</span></td>
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</tr>
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<tr>
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<td class="tg-8pu1" colspan="6"><span style="font-weight:bold;background-color:#F6F9F9">USB Connector</span></td>
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</tr>
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<tr>
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<td class="tg-4bam" colspan="2"><span style="font-weight:normal;background-color:#FFF">USB-B</span></td>
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<td class="tg-4bam" colspan="2"><span style="font-weight:normal;background-color:#FFF">USB-C</span></td>
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<td class="tg-4bam" colspan="2"><span style="font-weight:normal;background-color:#FFF">USB-C</span></td>
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</tr>
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<tr>
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<td class="tg-8pu1" colspan="6"><span style="font-weight:bold;background-color:#F6F9F9">Mouse/Keyboard Emulation (HID)</span></td>
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</tr>
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<tr>
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<td class="tg-4bam" colspan="2"><span style="font-weight:normal;background-color:#FFF">No</span></td>
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<td class="tg-4bam" colspan="2"><span style="font-weight:normal;background-color:#FFF">Yes</span></td>
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<td class="tg-4bam" colspan="2"><span style="font-weight:normal;background-color:#FFF">Yes</span></td>
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</tr>
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<tr>
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<td class="tg-8pu1" colspan="6"><span style="font-weight:bold;background-color:#F6F9F9">Real-Time Clock (RTC)</span></td>
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</tr>
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<tr>
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<td class="tg-4bam" colspan="2"><span style="font-weight:normal;background-color:#FFF">No</span></td>
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<td class="tg-4bam" colspan="2"><span style="font-weight:normal;background-color:#FFF">Yes</span></td>
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<td class="tg-4bam" colspan="2"><span style="font-weight:normal;background-color:#FFF">Yes</span></td>
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</tr>
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<tr>
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<td class="tg-8pu1" colspan="6"><span style="font-weight:bold;background-color:#F6F9F9">Pins</span></td>
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</tr>
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<tr>
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<td class="tg-0mi1"><span style="font-weight:bold;background-color:#F6F9F9">Built-in LED Pin</span></td>
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<td class="tg-4bam"><span style="font-weight:normal;background-color:#FFF">13</span></td>
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<td class="tg-8d8j" colspan="2">No</td>
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<td class="tg-8d8j" colspan="2">No</td>
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</tr>
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<tr>
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<td class="tg-0mi1"><span style="font-weight:bold;background-color:#F6F9F9">Digital I/O Pins</span></td>
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<td class="tg-4bam"><span style="font-weight:normal;background-color:#FFF">14</span></td>
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<td class="tg-4bam" colspan="2"><span style="font-weight:normal;background-color:#FFF">14</span></td>
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<td class="tg-4bam" colspan="2"><span style="font-weight:normal;background-color:#FFF">14</span></td>
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</tr>
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<tr>
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<td class="tg-0mi1"><span style="font-weight:bold;background-color:#F6F9F9">Analog input pins</span></td>
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<td class="tg-4bam"><span style="font-weight:normal;background-color:#FFF">6</span></td>
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<td class="tg-4bam" colspan="2"><span style="font-weight:normal;background-color:#FFF">6</span></td>
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<td class="tg-4bam" colspan="2"><span style="font-weight:normal;background-color:#FFF">6</span></td>
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</tr>
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<tr>
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<td class="tg-0mi1"><span style="font-weight:bold;background-color:#F6F9F9">PWM pins</span></td>
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<td class="tg-4bam"><span style="font-weight:normal;background-color:#FFF">6</span></td>
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<td class="tg-4bam" colspan="2"><span style="font-weight:normal;background-color:#FFF">6</span></td>
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<td class="tg-4bam" colspan="2"><span style="font-weight:normal;background-color:#FFF">6</span></td>
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</tr>
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<tr>
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<td class="tg-0mi1"><span style="font-weight:bold;background-color:#F6F9F9">DAC</span></td>
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<td class="tg-8d8j">No</td>
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<td class="tg-4bam" colspan="2"><span style="font-weight:normal;background-color:#FFF">1</span></td>
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<td class="tg-4bam" colspan="2"><span style="font-weight:normal;background-color:#FFF">1</span></td>
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</tr>
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<tr>
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<td class="tg-0mi1"><span style="font-weight:bold;background-color:#F6F9F9">External interrupts</span></td>
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<td class="tg-4bam"><span style="font-weight:normal;background-color:#FFF">No</span></td>
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<td class="tg-4bam" colspan="2"><span style="font-weight:normal;background-color:#FFF">2,3</span></td>
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<td class="tg-4bam" colspan="2"><span style="font-weight:normal;background-color:#FFF">2,3</span></td>
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</tr>
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<tr>
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<td class="tg-8pu1" colspan="6"><span style="font-weight:bold;background-color:#F6F9F9">Communication</span></td>
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</tr>
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<tr>
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<td class="tg-0mi1"><span style="font-weight:bold;background-color:#F6F9F9">UART</span></td>
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<td class="tg-4bam"><span style="font-weight:normal;background-color:#FFF">Yes</span></td>
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<td class="tg-4bam" colspan="2"><span style="font-weight:normal;background-color:#FFF">Yes</span></td>
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<td class="tg-4bam" colspan="2"><span style="font-weight:normal;background-color:#FFF">Yes</span></td>
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</tr>
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<tr>
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<td class="tg-0mi1"><span style="font-weight:bold;background-color:#F6F9F9">I2C</span></td>
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<td class="tg-4bam"><span style="font-weight:normal;background-color:#FFF">Yes</span></td>
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<td class="tg-4bam" colspan="2"><span style="font-weight:normal;background-color:#FFF">Yes</span></td>
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<td class="tg-4bam" colspan="2"><span style="font-weight:normal;background-color:#FFF">Yes</span></td>
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</tr>
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<tr>
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<td class="tg-0mi1"><span style="font-weight:bold;background-color:#F6F9F9">SPI</span></td>
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<td class="tg-4bam"><span style="font-weight:normal;background-color:#FFF">Yes</span></td>
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<td class="tg-4bam" colspan="2"><span style="font-weight:normal;background-color:#FFF">Yes</span></td>
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<td class="tg-4bam" colspan="2"><span style="font-weight:normal;background-color:#FFF">Yes</span></td>
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</tr>
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<tr>
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<td class="tg-0mi1"><span style="font-weight:bold;background-color:#F6F9F9">CAN</span></td>
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<td class="tg-8d8j">No</td>
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<td class="tg-4bam" colspan="2"><span style="font-weight:normal;background-color:#FFF">Yes</span></td>
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<td class="tg-4bam" colspan="2"><span style="font-weight:normal;background-color:#FFF">Yes</span></td>
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</tr>
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<tr>
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<td class="tg-8pu1" colspan="6"><span style="font-weight:bold;background-color:#F6F9F9">Power</span></td>
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</tr>
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<tr>
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<td class="tg-0mi1"><span style="font-weight:bold;background-color:#F6F9F9">I/O Voltage</span></td>
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<td class="tg-4bam"><span style="font-weight:normal;background-color:#FFF">5V</span></td>
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<td class="tg-0mi1"><span style="font-weight:bold;background-color:#F6F9F9">Circuit operating voltage</span></td>
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<td class="tg-4bam"><span style="font-weight:normal;background-color:#FFF">5 V</span></td>
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<td class="tg-0mi1"><span style="font-weight:bold;background-color:#F6F9F9">Circuit operating voltage</span></td>
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<td class="tg-4bam"><span style="font-weight:normal;background-color:#FFF">5 V (ESP32-S3 is 3.3 V)</span></td>
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</tr>
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<tr>
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<td class="tg-0mi1"><span style="font-weight:bold;background-color:#F6F9F9">Input voltage (nominal)</span></td>
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<td class="tg-4bam"><span style="font-weight:normal;background-color:#FFF">7-12V</span></td>
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<td class="tg-0mi1"><span style="font-weight:bold;background-color:#F6F9F9">Input voltage (VIN)</span></td>
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<td class="tg-4bam"><span style="font-weight:normal;background-color:#FFF">6-24 V</span></td>
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<td class="tg-0mi1"><span style="font-weight:bold;background-color:#F6F9F9">Input voltage (VIN)</span></td>
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<td class="tg-4bam"><span style="font-weight:normal;background-color:#FFF">6-24 V</span></td>
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</tr>
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<tr>
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<td class="tg-0mi1"><span style="font-weight:bold;background-color:#F6F9F9">DC Current per I/O Pin</span></td>
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<td class="tg-4bam"><span style="font-weight:normal;background-color:#FFF">20 mA</span></td>
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<td class="tg-0mi1"><span style="font-weight:bold;background-color:#F6F9F9">DC Current per I/O Pin</span></td>
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<td class="tg-4bam"><span style="font-weight:normal;background-color:#FFF">8 mA</span></td>
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<td class="tg-0mi1"><span style="font-weight:bold;background-color:#F6F9F9">DC Current per I/O Pin</span></td>
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<td class="tg-4bam"><span style="font-weight:normal;background-color:#FFF">8 mA</span></td>
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</tr>
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<tr>
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<td class="tg-8pu1" colspan="6"><span style="font-weight:bold;background-color:#F6F9F9">Clock speed</span></td>
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</tr>
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<tr>
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<td class="tg-0mi1"><span style="font-weight:bold;background-color:#F6F9F9">ATmega328P</span></td>
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<td class="tg-4bam"><span style="font-weight:normal;background-color:#FFF">16 MHz</span></td>
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<td class="tg-kz3h" rowspan="2">RA4M1</td>
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<td class="tg-7yig" rowspan="2">48 MHz</td>
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<td class="tg-0mi1"><span style="font-weight:bold;background-color:#F6F9F9">RA4M1</span></td>
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<td class="tg-4bam"><span style="font-weight:normal;background-color:#FFF">48 MHz</span></td>
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</tr>
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<tr>
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<td class="tg-0mi1"><span style="font-weight:bold;background-color:#F6F9F9">ATmega16U2</span></td>
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<td class="tg-4bam"><span style="font-weight:normal;background-color:#FFF">16 MHz</span></td>
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<td class="tg-0mi1"><span style="font-weight:bold;background-color:#F6F9F9">ESP32-S3-MINI-1-N8</span></td>
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<td class="tg-4bam"><span style="font-weight:normal;background-color:#FFF">up to 240 MHz</span></td>
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</tr>
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<tr>
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<td class="tg-8pu1" colspan="6"><span style="font-weight:bold;background-color:#F6F9F9">Memory</span></td>
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</tr>
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<tr>
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<td class="tg-kz3h" rowspan="2">ATmega328P</td>
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<td class="tg-7yig" rowspan="2">2KB SRAM, 32KB FLASH, 1KB EEPROM</td>
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<td class="tg-kz3h" rowspan="2">RA4M1</td>
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<td class="tg-7yig" rowspan="2">256 kB Flash, 32 kB RAM</td>
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<td class="tg-0mi1"><span style="font-weight:bold;background-color:#F6F9F9">RA4M1</span></td>
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<td class="tg-4bam"><span style="font-weight:normal;background-color:#FFF">256 kB Flash, 32 kB RAM</span></td>
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</tr>
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<tr>
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<td class="tg-0mi1"><span style="font-weight:bold;background-color:#F6F9F9">ESP32-S3-MINI-1-N8</span></td>
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<td class="tg-4bam"><span style="font-weight:normal;background-color:#FFF">384 kB ROM, 512 kB SRAM</span></td>
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</tr>
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<tr>
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<td class="tg-8pu1" colspan="6"><span style="font-weight:bold;background-color:#F6F9F9">MCU Resolution</span></td>
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</tr>
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<tr>
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<td class="tg-0mi1"><span style="font-weight:bold;background-color:#F6F9F9">ATmega328P</span></td>
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<td class="tg-4bam"><span style="font-weight:normal;background-color:#FFF">8-bit</span></td>
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<td class="tg-0mi1"><span style="font-weight:bold;background-color:#F6F9F9">RA4M1</span></td>
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<td class="tg-4bam"><span style="font-weight:normal;background-color:#FFF">32-bit</span></td>
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<td class="tg-0mi1"><span style="font-weight:bold;background-color:#F6F9F9">RA4M1</span></td>
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<td class="tg-4bam"><span style="font-weight:normal;background-color:#FFF">32-bit</span></td>
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</tr>
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</tbody></table>
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| Feature | Arduino UNO R3 | Arduino UNO R4 Minima | Arduino UNO R4 WiFi |
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|--------------------------------|:--------------------------------:|:-----------------------------:|:-----------------------------:|
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| Microcontroller | ATmega328P | Renesas RA4M1 (Arm Cortex-M4) | Renesas RA4M1 (Arm Cortex-M4) |
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| Wi-Fi/Bluetooth LE | No | No | ESP32-S3-MINI-1-N8 |
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| USB Connector | USB-B | USB-C | USB-C |
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| Mouse/Keyboard Emulation (HID) | No | Yes | Yes |
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| Real-Time Clock (RTC) | No | Yes | Yes |
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| Built-in LED Pin | 13 | No | No |
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| Digital I/O Pins | 14 | 14 | 14 |
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| Analog input pins | 6 | 6 | 6 |
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| PWM pins | 6 | 6 | 6 |
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| DAC | No | 1 (12-bit) | 1 (12-bit) |
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| External interrupts | No | 2,3 | 2,3 |
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| UART | Yes | Yes | Yes |
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| I2C | Yes | Yes | Yes |
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| SPI | Yes | Yes | Yes |
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| CAN | No | Yes | Yes |
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| Qwiic connector | No | No | Yes |
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| OFF pin | No | No | Yes |
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| VRTC pin | No | No | Yes |
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| LED Matrix | No | No | 12x8 (96 red LEDs) |
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| Operating voltage | 5V | 5V | 5V (ESP32-S3 is 3.3V) |
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| Input voltage (VIN) | 7-12V | 6-24V | 6-24V |
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| DC Current per I/O Pin | 20mA | 8mA | 8mA |
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| Clock speed | 16MHz | 48MHz | 48MHz |
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| Memory | 2kB SRAM, 32kB FLASH, 1kB EEPROM | 256kB Flash, 32kB RAM | 256kB Flash, 32kB RAM |
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| MCU Resolution | 8-bit | 32-bit | 32-bit |
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