STMicroelectronics STM32MP157CAC3

Overview

STM32MP157CAC3 from STMicroelectronics is a dual-core Arm® Cortex®-A7 (800 MHz) + Cortex®-M4 microprocessor unit with 3D GPU, TFT/DSI display support, 37 communication interfaces, 29 timers, advanced analog peripherals, and hardware crypto acceleration. It integrates 708 KB of on-chip SRAM, TrustZone® security, and supports LPDDR2/LPDDR3/DDR3 up to 1 Gbyte for industrial HMI, edge gateway, and Linux-capable embedded systems.

For engineers reviewing the STM32MP157CAC3 datasheet, STM32MP157CAC3 pinout, STM32MP157CAC3 application, or STM32MP157CAC3 equivalent, key selection criteria include dual-core Linux+RTOS coexistence capability, 2× CAN FD with TTCAN support, HDMI-CEC and DSI 2-lane 1 Gbps display interface, and hardware-accelerated AES/SHA/CRYP for secure boot and runtime protection.

Technical Context

The device implements a heterogeneous dual-core architecture: two Cortex-A7 cores run Linux in non-secure mode with 256 KB unified L2 cache and NEON/TrustZone support, while the Cortex-M4 (209 MHz) handles real-time tasks, sensor fusion, or safety-critical firmware independently. Inter-processor communication uses IPCC and hardware semaphores for deterministic resource sharing.

Its memory subsystem includes AXI/AHB interconnect matrices (266 MHz / 209 MHz), DDR controller supporting LPDDR3-1066 and DDR3L-1066, and flexible external memory interfaces (FMC, QUADSPI). Graphics are handled by Vivante® 3D GPU (OpenGL ES 2.0, 26 Mtriangle/s) with LTDC controller driving WXGA@60 fps or Full HD@30 fps via RGB or MIPI DSI.

Key Specifications

Pinout & Package

STM32MP157CAC3 is housed in a TFBGA361 package (12 × 12 mm, 0.5 mm ball pitch), featuring a bottom thermal pad for enhanced heat dissipation in continuous operation. The package complies with ECOPACK2 environmental standards and supports automated optical inspection (AOI) and X-ray void detection.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-core MPU applications.

Compared with i.MX 8M Mini and RZ/G2L, STM32MP157CAC3 uniquely delivers balanced Linux+RTOS concurrency, integrated DSI/3D GPU, and industrial-grade security features in a thermally efficient TFBGA361 package - making it optimal for space-constrained, display-rich, and safety-aware edge devices.

Availability

STM32MP157CAC3 is available at Aetrix Electronics and suitable for industrial HMI terminals, edge protocol gateways, smart building HVAC panels, and medical imaging edge nodes requiring stable component supply across multi-year production cycles.

Supply support for STM32MP157CAC3 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, Switzerland, designing and manufacturing microcontrollers, power management ICs, MEMS sensors, and automotive-grade processors.

The STM32MP series targets Linux-capable embedded applications demanding real-time responsiveness, graphical user interfaces, and hardware-enforced security - bridging the gap between microcontrollers and application processors for industrial and IoT edge use cases.

FAQ

What boot sources does STM32MP157CAC3 support?

STM32MP157CAC3 supports boot from eMMC, SD card, NAND flash, Quad-SPI NOR flash, USB mass storage, and serial interfaces (UART/USB) via BOOT0/BOOT1 strap configuration. The internal ROM code validates signed images using embedded public keys, enforcing secure boot chain integrity before loading FSBL.

Does STM32MP157CAC3 require an external PMIC?

No - STM32MP157CAC3 integrates multiple on-die LDOs (1.1 V core, 1.2 V DSI, 1.8 V USB, backup regulator) and supports direct connection to single 3.3 V or 5 V input. However, for high-current applications (>500 mA total), ST recommends companion PMICs like STPMIC1 to optimize efficiency and thermal performance.

How is TrustZone implemented across the dual-core architecture?

TrustZone is implemented at both hardware and firmware levels: the Cortex-A7 cores use TrustZone address space controllers (TZC) to partition DDR memory, while the Cortex-M4 operates in secure world by default. Peripherals like CRYP, HASH, RNG, and tamper detectors are accessible only in secure state, enforced by ETZPC firewall configuration.

What is the maximum resolution supported by the LTDC controller?

The LTDC controller supports up to WXGA (1366 × 768) at 60 fps or Full HD (1920 × 1080) at 30 fps with pixel clock up to 90 MHz. It includes two programmable layers with alpha blending, color LUTs, and dithering - enabling rich GUI rendering without external graphics memory or frame buffer compression.