Arduino Nano R4 Original

Features:
Microcontroller & Performance:The Arduino® Nano R4 is a Nano form factor board based on the Renesas RA4M1 series microcontroller (R7FA4M1AB3CFM#HA0), featuring a 48 MHz Arm® Cortex®-M4 processor for solid, responsive embedded performance.
Memory Upgrade:Compared to earlier Nano boards, the Nano R4 offers a larger memory footprint with 256 kB flash, 32 kB SRAM, and 8 kB data memory (EEPROM), giving you more room for code, buffers, and stored settings.
5V Compatibility:The Nano R4 operates at 5 V, making it hardware compatible with Nano form factor accessories that use the same operating voltage, so it fits neatly into existing 5V Nano ecosystems.
Variants (SKUs):The Nano R4 comes in two options: without headers (SKU: ABX00142) and with pre-installed headers (SKU: ABX00143), letting you choose between a cleaner build or quick plug-and-play use.
Qwiic Expansion:It includes an on-board Qwiic connector for easy integration with Modulinos, enabling quick, reliable expansion without soldering and with a cleaner wiring setup.

Specifications:

• Microcontroller: Renesas RA4M1 (Arm Cortex-M4)
• USB:USB-C (Programming Port)
• Pins:
  Digital I/O Pins: 21 (all exposed I/O usable as digital I/O)
  Analog input pins: 8
  DAC: 1
  PWM pins: 6
  External interrupts: 2, 3
• Misc:
  DAC: A0
  OpAmp: A1, A2, A3
  VRTC: J5
• Communication:
  UART: 1
  I2C: 2 (5V: A4, A5 / 3.3V: Qwiic, J3, J4)
  SPI: 1
  CAN: 1
• Power:
  Circuit operating voltage: +5 VDC
  Input voltage (VIN): +6–21 VDC
  DC Current per I/O Pin: 8 mA
• Main core Clock Speed: 48 MHz
• Memory (RA4M1):
  Flash: 256 kB
  RAM: 32 kB
  EEPROM: 8 kB
• Dimensions: 18x45 mm