STMicroelectronics STM32MP151CAC3T

Overview

STM32MP151CAC3T from STMicroelectronics is a dual-core heterogeneous microprocessor unit (MPU) integrating an Arm® Cortex®-A7 @ 800 MHz and Cortex®-M4 @ 209 MHz, with 708 KB on-chip SRAM, TrustZone® security, hardware crypto accelerators (AES/SHA/HMAC/RNG), and TFT-LCD controller supporting up to WXGA@60 fps - deployed in industrial HMIs, edge gateways, and smart building controllers.

For engineers reviewing the STM32MP151CAC3T datasheet, STM32MP151CAC3T pinout, STM32MP151CAC3T application, or STM32MP151CAC3T equivalent, key selection considerations include dual-core asymmetric processing capability, DDR3/LPDDR3 memory interface support, secure boot architecture, and integrated analog peripherals (dual 16-bit ADCs, dual 12-bit DACs, DFSDM).

Technical Context

The device implements a tightly coupled dual-core architecture: the Cortex-A7 subsystem runs Linux-based applications with L2 cache and NEON™ acceleration, while the Cortex-M4 handles real-time control tasks with FPU and MPU isolation. Inter-processor communication uses IPCC and hardware semaphores (HSEM) for deterministic resource sharing.

Clock management relies on five fractional PLLs supporting dynamic frequency scaling across domains; power management includes three low-power modes (Stop, Standby, LPLV-Stop) with DDR retention and 2 µA minimum current draw. Security is enforced via TrustZone address space controller (TZC), ETZPC, BSEC OTP, and active tamper detection.

Key Specifications

Pinout & Package

STM32MP151CAC3T is housed in a TFBGA361 package (12 mm × 12 mm, 0.5 mm pitch), RoHS-compliant and ECOPACK2 certified. Pin assignment follows ST's standardized ball map for the C variant, with dedicated power domains (VDDCORE, VDDIO, VDDUSB, VDDA), multiple I/O banks supporting 5 V-tolerant operation, and dedicated trace/debug (SWD/JTAG), boot configuration, and tamper pins.

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, STM32MP151CAC3T delivers superior power efficiency (2 µA Standby), integrated display controller, and hardware-enforced TrustZone security - making it optimal for cost-sensitive, display-rich, and security-critical industrial edge devices.

Availability

STM32MP151CAC3T is available at Aetrix Electronics and suitable for industrial HMIs, smart gateways, and secure building controllers requiring stable component supply, long lifecycle assurance, and full production documentation including BSP, OpenSTLinux SDK, and security certification packages.

Supply support for STM32MP151CAC3T 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, specializing in microcontrollers, power management, sensors, and automotive ICs - with over 40 years of industrial-grade silicon expertise.

The STM32MP series targets heterogeneous computing for edge intelligence, combining application processor performance with microcontroller reliability - designed specifically for Linux-capable, real-time, and security-aware industrial and IoT endpoints.

FAQ

What boot sources does STM32MP151CAC3T support?

STM32MP151CAC3T supports boot from internal ROM (with embedded first-stage bootloader), Quad-SPI flash, SD/eMMC, NAND flash via FSMC, and USB mass storage. Boot mode is selected via BOOT0/BOOT1 pins at power-on reset, and the ROM loader validates signature and integrity of second-stage firmware before execution.

Does STM32MP151CAC3T require external DDR memory to operate?

Yes - STM32MP151CAC3T has no embedded DRAM and requires external DDR3/LPDDR2/LPDDR3 memory for Linux operation. The internal 708 KB SRAM suffices only for Cortex-M4 standalone firmware or minimal bootloaders; full Linux kernel and rootfs must reside in external DRAM.

How is TrustZone implemented on STM32MP151CAC3T?

TrustZone is implemented via hardware-enforced memory and peripheral partitioning: TZC (TrustZone Address Space Controller) gates DDR access, ETZPC (Embedded TrustZone Protection Controller) locks peripheral registers, and BSEC fuses enforce secure boot chain. Secure world executes only in Cortex-A7 non-secure exception level 3 (EL3) monitor mode.

Can the Cortex-M4 core run independently of the Cortex-A7?

Yes - the Cortex-M4 can operate autonomously in "M4-only" mode with its own clock, power domain, and memory map. It boots from internal SRAM or external flash, handles real-time tasks (motor control, sensor fusion), and communicates with the A7 via IPCC mailboxes and shared memory - no A7 involvement required for basic operation.