STMicroelectronics STM32MP257F-EV1

Overview

STM32MP257F-EV1 from STMicroelectronics is an evaluation board built around the STM32MP257FAI3 dual-core Arm® Cortex®-A35 (1.5 GHz) + Cortex®-M33 (400 MHz) microprocessor in TFBGA436, featuring 32-Gbit eMMC v5.0, 512-Mbit S-NOR flash, two 16-Gbit DDR4 DRAMs, and triple 1-Gbit/s Ethernet with IEEE 802.3ab-compliant TSN switching - used for industrial edge gateway prototyping and Linux-based heterogeneous application development.

For engineers reviewing the STM32MP257F-EV1 datasheet, STM32MP257F-EV1 pinout, STM32MP257F-EV1 application, or STM32MP257F-EV1 equivalent, key selection considerations include dual-core Linux/RTOS coexistence support, on-board STLINK-V3EC debugger with virtual COM port, MIPI CSI-2® camera expansion, CAN FD interfaces, and OpenSTLinux Yocto compatibility.

Technical Context

The board implements a full-system reference design for the STM32MP257FAI3 MPU, integrating STPMIC25 power management IC, DDR4 memory controller with 32-bit bus width, and hardware-accelerated cryptographic engines supporting secure boot. It enables simultaneous execution of Linux on Cortex-A35 cores and real-time tasks on Cortex-M33 via OpenAMP.

Hardware peripherals include three RGMII Ethernet PHYs with TSN switch firmware, dual-lane MIPI CSI-2® for camera input, LVDS and MIPI DSI display outputs, USB Type-C® DRP with re-enumeration capability, and mikroBUS™/Raspberry Pi®-compatible GPIO expansion - all accessible through standardized connectors without soldering.

Key Specifications

Availability

STM32MP257F-EV1 is available at Aetrix Electronics and suitable for industrial edge gateways, smart vision systems, HMI controllers, and Linux-based embedded AI inference platforms requiring stable component supply and full software stack continuity.

Supply support for STM32MP257F-EV1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing microcontrollers, power management ICs, sensors, and analog/mixed-signal devices for industrial, automotive, and consumer applications.

The STM32MP2 series targets high-performance, secure, heterogeneous computing for Linux-capable edge devices - combining application-level processing, real-time control, and hardware security in a single package for industrial IoT and smart infrastructure.

FAQ

Does STM32MP257F-EV1 support booting from microSD™ card?

Yes. The board supports booting from microSD™ card preloaded with OpenSTLinux images, in addition to eMMC and S-NOR flash. Boot mode is selected via four DIP switches (boot pin switches), allowing flexible firmware deployment during development and validation phases without reflashing internal storage.

What debug interfaces are available on STM32MP257F-EV1?

The board integrates STLINK-V3EC as an embedded debugger/programmer with SWD, virtual COM port, and mass storage emulation over USB Type-C®. No external JTAG/SWD probe is required for firmware flashing, serial console access, or real-time debugging of both Cortex-A35 and Cortex-M33 cores.

Can STM32MP257F-EV1 run real-time applications alongside Linux?

Yes. The dual-core architecture enables Linux on Cortex-A35 and real-time tasks on Cortex-M33 using OpenAMP inter-processor communication. STM32CubeMP2 provides FreeRTOS-based examples and IPC middleware, validated for deterministic response times under concurrent Linux workloads.

Is MIPI CSI-2® camera interface supported with hardware synchronization?

Yes. The dual-lane MIPI CSI-2® connector supports hardware frame synchronization via dedicated PCLK, VSYNC, and HSYNC signals routed to the STM32MP257FAI3 image signal processor (ISP). It is validated with ST's OV5640-based camera modules and supports up to 1080p30 capture with ISP preprocessing.