Arduino Portenta H7 vs ESP32-P4: STM32H747 vs 400 MHz RISC-V for High-Performance Embedded Projects

The Arduino Portenta H7 and ESP32-P4 both target high-performance embedded systems, but they are very different products.

Portenta H7 is a complete industrial module built around:

ESP32-P4 is primarily a high-performance MCU platform built around:

The most important difference is that ESP32-P4 itself contains:

Wireless connectivity requires a companion chip such as an ESP32-C5 or ESP32-C6.

Quick Comparison

Feature	Portenta H7	ESP32-P4 platform
Main CPU	STM32H747XI	Dual-core RISC-V
High-performance clock	M7 up to 480 MHz	2 × HP cores up to 400 MHz
Secondary/low-power CPU	M4 up to 240 MHz	LP RISC-V up to 40 MHz
Internal application memory	1 MB class SRAM	768 KB HP L2MEM + 32 KB LP SRAM
External/in-package RAM	8 MB SDRAM	16 MB or 32 MB in-package PSRAM on current P4NRW variants
External Flash	16 MB onboard	Board/module dependent
Wi-Fi	Yes, Murata 1DX	No integrated Wi-Fi
Bluetooth	Yes	No integrated Bluetooth
AI/DSP acceleration	Cortex DSP/FPU + Chrom-ART	128-bit custom AI/DSP vector extensions
JPEG	Hardware JPEG codec	Hardware JPEG codec
H.264	No dedicated H.264 encoder	Hardware H.264 encoder
Image Signal Processor	No dedicated ISP comparable to P4	Yes
MIPI CSI	No native MIPI CSI interface	Yes
MIPI DSI	Yes	Yes
USB High Speed	Yes	Yes
Ethernet	10/100 PHY onboard	Ethernet MAC; PHY board dependent
CAN	CAN controller, external transceiver required	TWAI controller, external transceiver required
True DAC	Yes	No DAC listed in current P4 peripheral set
Secure element	Dedicated external secure element	Integrated hardware security engine/eFuses
Arduino support	Official Arduino board/core	Supported by Arduino-ESP32
Best fit	Industrial module / carrier design	HMI, vision, multimedia and high-performance custom boards

Portenta H7 Uses Heterogeneous Arm Cores

The STM32H747 contains two different Arm cores:

This makes it natural to split a design into:

ESP32-P4 Uses Two Matching High-Performance RISC-V Cores

ESP32-P4 instead has:

plus a separate:

The LP core can remain active in low-power modes while the high-performance subsystem sleeps.

Raw Clock Speed Does Not Decide the Comparison

Portenta’s M7 reaches 480 MHz while ESP32-P4’s two high-performance cores reach 400 MHz each, but direct MHz comparisons are misleading because the CPU architectures, caches, memory systems and acceleration hardware differ.

ESP32-P4 Has Custom AI and DSP Instructions

One of P4’s major advantages is Espressif’s custom AI/DSP processor instruction extension with:

and 128-bit operations for vector multiplication, addition, subtraction, shifting, comparison, complex arithmetic and memory operations.

This is particularly useful for embedded AI, FIR/FFT processing, audio and image algorithms.

Portenta H7 Also Has Strong DSP Capability

The Cortex-M7 and Cortex-M4 support Arm DSP instructions and floating-point operations, and Portenta H7 is already capable of TensorFlow Lite Micro, audio DSP, sensor fusion and image preprocessing.

ESP32-P4, however, is much more explicitly designed around modern edge-AI and multimedia workloads.

Memory Architecture

Portenta H7 provides:

as a complete board configuration.

The current ESP32-P4 datasheet specifies:

plus ROM and cache resources.

ESP32-P4 Current PSRAM Variants

Current P4 variants include:

The PSRAM interface can run at up to 250 MHz with a wide high-bandwidth interface.

Large Memory Favours P4 for Multimedia

A 32 MB PSRAM configuration provides considerably more frame-buffer and tensor space than Portenta H7’s 8 MB SDRAM.

This matters for:

• camera frames;
• large displays;
• graphics;
• neural-network tensors;
• audio buffers;
• large UI assets.

Portenta H7 Is a Complete Memory Configuration

With Portenta H7, 8 MB SDRAM and 16 MB external Flash are already part of the module.

With ESP32-P4, exact Flash, PSRAM and peripheral hardware depend on the chip variant, module, development board or custom PCB.

ESP32-P4 Has No Integrated Wi-Fi or Bluetooth

This is the most important naming trap.

Despite the ESP32 name, P4 contains no Wi-Fi radio and no Bluetooth radio.

Wireless Requires a Companion ESP32

Espressif recommends external wireless devices such as:

for Wi-Fi and Bluetooth.

The official ESP32-P4 Function EV boards use this type of companion-wireless architecture.

Portenta H7 Has Wireless Built In

Portenta H7 includes the Murata 1DX with:

already integrated into the board.

P4 Can Gain Newer Wi-Fi Through Its Companion Chip

A P4 design using a modern companion such as ESP32-C5 can add newer wireless capabilities, including newer Wi-Fi generations depending on the selected companion hardware.

The trade-off is another chip or module, extra firmware, routing, RF integration and power design.

MIPI CSI Is a Major ESP32-P4 Advantage

ESP32-P4 includes a dedicated:

camera interface supporting two lanes at up to approximately 1.5 Gbps per lane.

Supported input formats include RGB888, RGB666, RGB565, YUV422, YUV420, RAW8, RAW10 and RAW12.

Portenta H7 Uses a More Traditional Camera Interface

Portenta H7 exposes an 8-bit camera interface through its high-density connectors and works with accessories such as the Portenta Vision Shield.

This is useful for embedded vision, but the P4’s native MIPI CSI interface is much more naturally aligned with modern high-bandwidth camera sensors.

Both Support MIPI DSI Displays

Portenta H7 exposes MIPI DSI through its high-density connector, while ESP32-P4 also includes dedicated MIPI DSI hardware.

ESP32-P4 Is Strongly Optimised for HMI Workloads

P4 also contains:

• LCD controller;
• Pixel Processing Accelerator;
• 2D DMA;
• JPEG codec;
• Image Signal Processor;
• H.264 encoder.

This makes it particularly attractive for touch HMIs, smart displays, video doorbells, camera products and industrial panels.

Hardware H.264 Encoding

ESP32-P4 includes a baseline hardware H.264 encoder capable of up to approximately:

for supported YUV420 progressive configurations.

Portenta H7 Has JPEG Hardware but No Equivalent H.264 Encoder

The STM32H747 includes JPEG acceleration and the Chrom-ART 2D graphics accelerator, but it does not provide the same dedicated H.264/ISP video pipeline as P4.

USB Capability

Portenta H7 USB-C supports High-Speed/Full-Speed USB, host/device operation and DisplayPort output.

ESP32-P4 includes:

giving it substantial flexibility for high-speed peripherals and debugging.

Ethernet

Portenta H7 already contains a:

and exposes Ethernet through its carrier connector.

ESP32-P4 provides an Ethernet MAC, but the PHY, magnetics and connector depend on the board or custom design.

CAN vs TWAI

Portenta H7 exposes an STM32 CAN controller, while ESP32-P4 includes Espressif’s TWAI controller for classical CAN signalling.

Both still require an external CAN transceiver to create CANH and CANL.

Portenta H7 Has a True DAC

The STM32H747 contains two 12-bit DAC channels, and Portenta exposes one externally on A6.

ESP32-P4 does not list a general-purpose DAC in its current peripheral set, so a true analogue output requires an external DAC.

GPIO

ESP32-P4 provides up to:

at chip level.

Portenta H7 exposes its GPIO through MKR-style headers plus two 80-pin high-density connectors with a fixed production module pinout.

Security Architecture

Portenta H7 includes a dedicated secure element, depending on board version:

for credential storage, keys and device identity.

ESP32-P4 integrates secure boot, AES, ECC, RSA, SHA, HMAC, digital-signature engines, XTS-AES external-memory encryption, TRNG, eFuse OTP and a hardware key manager.

Portenta H7 Is Already a Production Module

Portenta H7 already integrates the MCU, memory, wireless, secure element, power management, Li-Po charging, Ethernet PHY, antenna connector and production connectors.

This reduces the hardware engineering required to reach a finished product.

ESP32-P4 Gives the Hardware Designer More Freedom

A P4 design can choose exactly which PSRAM, Flash, wireless companion, display, camera, Ethernet PHY, USB arrangement and power system are required.

That can produce a highly optimised product, but it requires more board-level engineering.

Arduino Support

Portenta H7 is an official Arduino board using the Arduino Mbed Portenta core.

ESP32-P4 is now also supported by Espressif’s Arduino-ESP32 core, whose current supported-SoC table lists:

ESP-IDF Remains the Native P4 Environment

For advanced P4 features such as MIPI CSI, MIPI DSI, H.264, ISP, advanced USB and wireless-companion integration, ESP-IDF generally provides the deepest hardware support.

Which Is Better for a Camera Product?

ESP32-P4 has the architectural advantage because it integrates:

Which Is Better for an Industrial Controller?

Portenta H7 is exceptionally convenient because it already provides:

• compact production module;
• carrier ecosystem;
• integrated wireless;
• secure element;
• Ethernet PHY;
• Li-Po management;
• dual-core real-time architecture.

Which Is Better for an HMI?

Both are strong.

Portenta H7 offers Chrom-ART, MIPI DSI and DisplayPort over USB-C.

ESP32-P4 offers a more extensive multimedia subsystem with MIPI DSI, PPA, 2D-DMA, JPEG, H.264, ISP and larger PSRAM options.

Which Is Better for Wi-Fi Out of the Box?

Portenta H7.

Wireless is already built into the module, while ESP32-P4 requires an additional radio device.

Which Is Better for Analogue Output?

Portenta H7 because it exposes a genuine 12-bit DAC.

Which Is Better for Battery-Backed Operation?

Portenta H7 is easier because Li-Po connector, charger and power-management circuitry are already integrated.

Which Is Better for Custom Board Cost Optimisation?

ESP32-P4 can be attractive for a high-volume custom PCB because the designer chooses exactly which wireless, memory, display, camera, Ethernet and power hardware are fitted.

Decision Table

Requirement	Better fit
Complete industrial module	Portenta H7
Integrated Wi-Fi/Bluetooth	Portenta H7
Integrated Li-Po charging	Portenta H7
Dedicated secure element	Portenta H7
True DAC	Portenta H7
Carrier-board ecosystem	Portenta H7
Large PSRAM options	ESP32-P4
MIPI CSI camera	ESP32-P4
Hardware H.264 encoder	ESP32-P4
Dedicated ISP	ESP32-P4
AI/DSP vector extension	ESP32-P4
Custom HMI board	ESP32-P4
Arduino IDE	Both supported
Industrial integration with minimum hardware design	Portenta H7
High-volume custom multimedia design	ESP32-P4

Quick Reference

Final Thoughts

The Portenta H7 and ESP32-P4 overlap in high-performance embedded applications, but their strengths are different.

Portenta H7 is the more complete module: processor, memory, wireless, security, battery management, Ethernet PHY and production connectors are already integrated.

ESP32-P4 is the more multimedia-oriented processor platform. MIPI CSI, MIPI DSI, ISP, JPEG, H.264, AI/DSP vectors, large PSRAM and multiple USB controllers give it a major advantage for smart displays, camera products, video devices, edge vision and high-end HMI systems.

The P4’s biggest caveat is easy to miss:

so a connected product normally adds a companion ESP32 radio.

For a new industrial controller where the objective is to minimise hardware-integration effort, Portenta H7 remains a very coherent solution.

For a new custom multimedia/HMI design where the PCB will be designed around the processor, ESP32-P4 offers a much newer and more specialised peripheral set.

For detailed Portenta wiring, see our Arduino Portenta H7 pinout guide. For another STM32H747 comparison, see Arduino GIGA R1 WiFi vs ESP32-P4.