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Arduino Portenta H7: specs and pinout

Arduino PRO system-on-module with two Arm cores (Cortex-M7 and Cortex-M4) on one STM32H747XI, MKR-style headers on the edges and two high-density connectors underneath for carriers and shields.

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Specs

Power

Pinout

Rows come from the official Portenta H7 full pinout sheet (ABX00042, last update 13/11/2024): the MKR-style headers on page 1 (left and right columns listed from the USB end downward, as in the drawing) and the J1 and J2 high-density connector tables on page 2. Only pins that carry a label on the sheet are listed; unlabelled high-density pins are left out. Rows apply to the full Portenta H7 pinout sheet; check which variant (H7, H7 Lite or H7 Lite Connected) you have.

Build with it

Project ideas for the Arduino Portenta H7. Each link opens Soldr with the prompt filled in; Soldr assigns the pins, checks power and shows how to wire every part.

• Wired temperature and humidity logger: The Mid Carrier adds the RJ45 Ethernet port and a microSD slot for the H7, which has the Ethernet PHY on board. The DHT22 runs from 3.3 V to 6 V, so it can be powered from the 3.3 V rail, with its data line on a 3.3 V GPIO. Check the module's pin order on its silkscreen. Learning project.
• Dual-core RGB LED demo: The STM32H747XI has a Cortex-M7 and a Cortex-M4 that can run separate programs, and the board has an RGB LED on board. Power and programming come over USB-C.
• Analog knob logger: The H7 has a 16-bit ADC on A0 to A6. Wire the potentiometer's outer pins to the 3V3 pin and GND so the input never goes above 3.3 V, and the wiper to A0.

Common mistakes

• Wiring 5 V modules or 5 V signal lines straight to the 3.3 V I/O: the board runs at 3.3 V and the sheets state no 5 V tolerance, so use a level shifter or a 3.3 V part (source: Arduino official documentation)
• Assuming every Portenta H7 variant has the same parts: the datasheet marks Wi-Fi/Bluetooth as H7 and H7 Lite Connected only, and the secure element, level shifters and USB-C video converter as the full H7 only (source: Arduino official documentation p.16-17)
• Using I2C1 or I2C2 for your own devices without checking: I2C1 (HD pins 43-45) is shared with the secure element, PMIC and analog devices and I2C2 with the camera; I2C0 (pins 44-46) is the free port (source: Arduino official documentation p.14, section 3.3)

Not covered by the official source

• This page covers the full Portenta H7. Memory, Wi-Fi/Bluetooth, secure element and USB-C video converter differ between H7, H7 Lite and H7 Lite Connected; the specs here are for the full H7 unless stated.
• The datasheet's operating-conditions table lists only the board temperature range, no VIN range.
• The Tech Specs page names Bluetooth 4.1 for the wireless module while the datasheet table names BLE 5 via the Cordio stack and BLE 4.2 via the Arduino stack; the datasheet wording is used.
• I/O pin 5 V tolerance is not stated in the Arduino documents, so it is left empty.

Sources

• Arduino official documentation (Portenta H7 Collective Datasheet, revision 8, modified 07/11/2026)
• Arduino official pinout diagram (Portenta H7 full pinout, last update 13/11/2024)
• Arduino official documentation (Arduino Portenta H7 hardware page, Tech Specs)