STMicroelectronics STM32MP157CAB3

Overview

STM32MP157CAB3 from STMicroelectronics is a dual-core Arm® Cortex®-A7 (800 MHz) + Cortex®-M4 microprocessor unit (MPU) with 3D GPU, TFT/DSI display support, 37 communication interfaces, 29 timers, advanced analog peripherals, and hardware crypto acceleration. It integrates 708 KB on-chip SRAM, TrustZone® security, DDR3/LPDDR3 memory controller, and operates across 1.71–3.6 V I/O supply with 5 V-tolerant pins - deployed in industrial HMIs, edge gateways, and smart building controllers.

For engineers reviewing the STM32MP157CAB3 datasheet, STM32MP157CAB3 pinout, STM32MP157CAB3 application, or STM32MP157CAB3 equivalent, key selection considerations include dual-core Linux-capable architecture, 2× CAN FD with TTCAN support, MIPI DSI 2-lane 1 Gbps interface, Vivante® 3D GPU performance (26 Mtriangle/s), and secure boot with active tamper detection.

Technical Context

The STM32MP157CAB3 implements a heterogeneous dual-core architecture: two Cortex-A7 cores run Linux or Android with L1 caches (32 KB I/D each) and shared 256 KB L2 cache, while the Cortex-M4 (209 MHz) handles real-time tasks with FPU and MPU isolation. TrustZone® enforces secure world/non-secure world partitioning at both CPU and peripheral levels.

Its interconnect matrix comprises a 64-bit AXI bus (266 MHz) and 32-bit AHB bus (209 MHz), enabling concurrent high-bandwidth data paths for GPU, DDR, and peripherals. The 6 PLLs support fractional clock synthesis for precise timing control across USB, Ethernet, DSI, and audio subsystems.

Key Specifications

Pinout & Package

STM32MP157CAB3 is housed in a TFBGA361 package (12 × 12 mm, 0.5 mm ball pitch), featuring 361 balls with 176 general-purpose I/Os, 8 secure I/Os, 6 wakeup inputs, and dedicated power/ground distribution optimized for DDR signal integrity and thermal dissipation.

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, STM32MP157CAB3 uniquely combines dual Cortex-A7 with Cortex-M4, integrated DSI PHY, dual CAN FD + TTCAN, and TrustZone-secured peripheral isolation - making it optimal for resource-constrained, display-rich, safety-aware industrial edge devices.

Availability

STM32MP157CAB3 is available at Aetrix Electronics and suitable for industrial HMIs, edge gateways, and smart building controllers requiring stable component supply, long-term lifecycle assurance, and qualified automotive-grade traceability.

Supply support for STM32MP157CAB3 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, sensors, and automotive semiconductors since 1987.

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

FAQ

What boot sources does STM32MP157CAB3 support?

STM32MP157CAB3 supports eight boot modes selected via BOOT0 and BOOT1 pins: FSMC NOR/NAND, SDMMC (SD/eMMC), USB device, UART, SPI NOR, and internal ROM. Each mode loads the first-stage bootloader (FSBL) from the configured interface, enabling flexible firmware recovery and field updates without JTAG.

Does STM32MP157CAB3 require external PMIC support?

No - STM32MP157CAB3 integrates multiple on-die LDOs (1.1 V core, 1.2 V DSI, 1.8 V USB, 0.9 V backup) and a dedicated backup regulator. External PMIC is optional for enhanced efficiency or multi-rail sequencing in high-reliability systems, but not required for basic operation per ST AN5217 guidelines.

How is TrustZone implemented across CPU and peripherals?

TrustZone is implemented via hardware address space controllers (TZC for DDR, ETZPC for peripherals) that enforce access permissions based on secure/non-secure world status. The Cortex-M4 runs exclusively in secure world, while Cortex-A7 cores switch context via monitor mode; peripherals like RNG, CRYP, and TAMP are locked to secure access only.

What is the maximum pixel clock frequency supported by the LTDC controller?

The LTDC controller supports a maximum pixel clock of 90 MHz, enabling WXGA (1366×768) resolution at 60 fps or Full HD (1920×1080) at 30 fps in RGB888 format. Clock generation is derived from dedicated PLLs with fractional dividers, allowing precise tuning for custom display timings without external clock generators.