This won’t be a problem in most cases, except for libraries and examples optimized for the AVR architecture (think assembly code) that will need to be ported to the new Renesas RA architecture.
The company has also been working on retrocompatibility of the most popular Arduino libraries so that users can reuse existing sketches and tutorials developed for the UNO R3 on the UNO R4. Two versions of the new 32-bit Arduino UNO board will be offered: UNO R4 WiFi and UNO R4 Minima with the only difference being the former getting an ESP32-S3 module for wireless connectivity.Īrduino says pinout, voltage, and form factor are unchanged from UNO R3 in order to ensure maximum hardware and electrical compatibility with existing shields and projects.
The new Arduino UNO R4 board also adds a CAN bus and a 12-bit analog DAC. Input voltage – 7 to 24V via a power barrel jack or Vin, 5V via USB-C port.Analog – 6x analog input pin, 12-bit analog DAC.Expansions – Arduino UNO headers with Pins.USB – 1 x USB Type-C port for power and programming.Wireless (Arduino UNO R4 WiFi only) – ESP32-S3-MINI-1 module based on ESP32-S3 dual-core Xtensa LX7 microcontroller with 512KB SRAM, 384KB ROM, WiFi 4 and Bluetooth 5.0 connectivity, PCB antenna.Microcontroller – Renesas RA4M1 Arm Cortex-M4F MCU 48 MHz with 32KB SRAM, 256KB flash.What’s hidden behind the yellow rectangle?Īrduino UNO R4 (preliminary) specifications: The USB Type-B device port has been upgraded to a more modern USB Type-C port and the UNO R4 can take up to 24V supply voltage. The new Arduino UNO R4 offered improved performance and greater resources since the MCU is clocked three times faster than the 8bit AVR MCU found in the UNO R3, the board gets sixteen times more RAM (32KB vs 2KB to 32kB) and eight times more flash memory (256KB vs 32kB). Arduino have launched an upgrade to their 8-bit Arduino UNO R3 board with the Arduino UNO R4 featuring a 48 MHz Renesas RA4M1 Arm Cortex-M4F 32-bit microcontroller, and an optional ESP32-S3 module for WiFi 4 and Bluetooth 5.0 connectivity.
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