STMicroelectronics STM32MP157DAC1

Overview

STM32MP157DAC1 from STMicroelectronics is a dual-core Arm® Cortex®-A7 (800 MHz) + Cortex®-M4 microprocessor unit with 3D GPU, TFT/DSI display support, and 37 communication interfaces including dual CAN FD controllers and Gigabit Ethernet. It integrates 708 KB of on-chip SRAM, TrustZone® security, and supports LPDDR3/DDR3 external memory up to 1 Gbyte - deployed in industrial HMIs, smart gateways, and edge AI vision terminals.

For engineers reviewing the STM32MP157DAC1 datasheet, STM32MP157DAC1 pinout, STM32MP157DAC1 application, or STM32MP157DAC1 equivalent, key selection considerations include dual-core Linux-capable architecture, hardware-accelerated graphics (Vivante® OpenGL® ES 2.0), DDR retention in Standby mode (2 µA), and secure boot via BSEC with 3072-bit fuses including 96-bit unique ID.

Technical Context

The device implements a heterogeneous dual-core architecture: two Cortex®-A7 cores run Linux-based applications with 256 KB unified L2 cache and Arm® NEON™/TrustZone®, while the Cortex®-M4 (209 MHz) handles real-time control, sensor fusion, or secure firmware execution in isolation. Inter-processor communication uses IPCC with shared memory and hardware semaphores (HSEM).

Memory subsystem includes AXI/AHB bus matrices (266 MHz / 209 MHz), flexible external memory controller (FMC) for NAND/SLC, dual Quad-SPI interface, and dedicated DDRCTRL with TrustZone address space controller (TZC) for secure memory partitioning - enabling concurrent high-bandwidth display, networking, and storage I/O.

Key Specifications

Pinout & Package

STM32MP157DAC1 is packaged in a TFBGA361 (12 × 12 mm, 0.5 mm pitch) ball grid array, compliant with ECOPACK2 environmental standards. Pin functions are defined per ball position with multiple alternate functions (AF0–AF15) mapped across 176 GPIOs, including 8 secure I/Os and 6 wakeup-capable pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with i.MX 8M Mini and RZ/G2L, STM32MP157DAC1 uniquely combines Linux-capable dual A7 cores, Vivante 3D GPU, DSI/TFT display engine, dual CAN FD, and 2 µA Standby - making it optimal for resource-constrained, display-rich, and security-critical edge devices requiring long battery life and fieldbus interoperability.

Availability

STM32MP157DAC1 is available at Aetrix Electronics and suitable for industrial HMIs, smart gateways, and edge vision terminals requiring stable component supply across multi-year production cycles.

Supply support for STM32MP157DAC1 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, and automotive-grade components since 1987.

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, medical, and smart infrastructure markets.

FAQ

What boot media does STM32MP157DAC1 support natively?

STM32MP157DAC1 supports boot from internal Flash (via ROM code), eMMC, SD card, serial NOR/NAND via Quad-SPI, and parallel NAND/PSRAM via FMC. Boot mode is selected using BOOT0 and BOOT1 pins at power-up, with configurable fallback sequences stored in BSEC OTP for field recovery.

Does STM32MP157DAC1 require external PMIC support?

No - STM32MP157DAC1 integrates multiple on-chip LDOs (1.1 V, 1.2 V, 1.8 V) and a backup regulator (~0.9 V), enabling direct connection to single 3.3 V or 5 V input. However, external PMICs (e.g., STPMIC1) are recommended for high-efficiency multi-rail systems with dynamic voltage scaling and thermal management.

How is TrustZone® implemented across the dual-core architecture?

TrustZone® is implemented at both SoC and peripheral levels: the Cortex-A7 cores operate in Secure/Non-secure states with TZC enforcing DDR memory partitioning, while ETZPC gates peripheral access per core domain. The Cortex-M4 runs exclusively in Secure state and manages secure services (e.g., crypto key generation) isolated from Linux OS.

Can the STM32MP157DAC1's GPU render OpenGL® ES 2.0 content without external memory bandwidth bottlenecks?

Yes - the 256 KB unified L2 cache and 64-bit AXI interconnect (266 MHz) provide sustained bandwidth >2 GB/s to DDR, sufficient for 133 Mpixel/s GPU throughput. Benchmarks show full utilization of Vivante® GPU at WXGA resolution without frame drops, provided DDR is configured for LPDDR3-1066 with proper layout-controlled trace impedance.