Portenta C33 is a $64 Arduino Pro board based on Renesas RA6M5 Arm Cortex-M33 MCU

Arduino Portenta C33 is the latest board from the Arduino Pro family which the company dubs a “high-performance, low-price” solution based on a 200 MHz Renesas RA6M5 Arm Cortex-M33 microcontroller and equipped with a ESP32-C3 Wi-Fi and Bluetooth Low Energy module.

The new board provides a cost-effective alternative to the Portenta H7 and X8 boards, but still offers wireless connectivity, a secure element for industrial-grade security, and compatibility with Portenta, MKR, and Nicla components.

Arduino Portenta C33

Portenta C33 specifications:

  • Microcontroller – Renesas R7FA6M5BH2CBG Arm Cortex-M33 microcontroller @ up to 200 MHz with 512KB SRAM, 2MB Flash, Arm TrustZone, and Secure Crypto Engine 9
  • Storage – 16 MB QSPI Flash
  • Connectivity
    • 10/100M Ethernet PHY
    • ESP32-C3 WiFi and BLE module
  • USB – 1x USB Type-C high-speed port with Power Delivery support
  • I/Os via 2x 80-pin high-density connectors, Arduino MKR headers with castellated hole, and a 5-pin I2C connector
    • Storage – SD Card
    • Networking – 10/100M Ethernet
    • Audio – I2S, SAI, PDM
    • Serial – CAN Bus
    • Analog – ADC
    • Low-speed I/Os – SPI, I2C, GPIO
    • Debugging – JTAG/SWD
  • Security – NXP SE050C2 Secure Element
  • Misc – Reset button
  • Power Supply
    • Via USB-C PD port
    • Support for 3.7V/700mAH minimum LiPo single-cell battery
  • Dimensions – 66.04 x 25.40 mm
  • Temperature Range – -40°C to +85°C

Renesas RA6M5 Arduino boardThe board can be programmed with the Arduino IDE or MicroPython, supports OTA firmware updates via services such as Arduino IoT cloud, and is expected to be used in cost-sensitive Industrial IoT or automation applications such as water, gas, or electricity meters, as well as for IoT prototyping, and use cases where Portenta H7/X8 boards are overpowered for the task at hand.

Renesas RA6M5 Block Diagram
Renesas RA6M5 microcontroller block diagram

You’ll find further technical details and documentation on the Arduino Pro website. The Arduino Portenta C33 is now selling for $64 US/59 Euros on the Arduino store.

Update: This article was initially published on March 15, 2023 for the announcement at Embedded World 2023, and updated following availability of the board.

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Georgi Angelov
1 year ago

$68 is  lower cost ?!?

1 year ago

Hm, curious why Arduino redesigned the board for Renesas usage instead of just get just releases H5 for basically the same feature set and I would also guess much closer to previous H7 from design point of view.

Steve Garber
Steve Garber
11 months ago
9 months ago

The Arduino approach abstracts hardware, so picking the Renesas ARM MCU gave performance and price advantages without any changes to high-level coding. Portable code and libraries are the goal for platforms like this.

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