STMicroelectronics STM32U5A5AJH6

Overview

STM32U5A5AJH6 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M33 32-bit microcontroller with TrustZone® and FPU, delivering 240 DMIPS at up to 160 MHz. It integrates 4 MB Flash with ECC, 2.5 MB SRAM (with configurable ECC), MIPI® DSI host controller, LTDC, Neo-Chrom GPU, and hardware crypto accelerators (AES, PKA, HASH, RNG). It targets secure, graphics-rich, battery-constrained applications such as smart medical wearables and industrial HMI displays.

For engineers reviewing the STM32U5A5AJH6 datasheet, STM32U5A5AJH6 pinout, STM32U5A5AJH6 application, or STM32U5A5AJH6 equivalent, key selection considerations include its 150 nA Shutdown mode, dual 14-bit ADCs (2.5 Msps), TrustZone-certified security architecture (PSA Level 3, SESIP3), and LQFP64 package with 51 I/Os - critical for compact, secure, low-power embedded designs.

Technical Context

The STM32U5A5AJH6 implements a dual-bank Flash architecture enabling read-while-write operation and supports on-the-fly decryption of Octo-SPI external memories via OTFDEC. Its power architecture combines an SMPS step-down converter and LDO, allowing dynamic voltage scaling and switch-on-the-fly operation between regulators to optimize efficiency across operating modes.

TrustZone® enforces hardware-isolated secure/non-secure worlds with securable peripherals, memory regions (including 322 KB SRAM with ECC), and boot entry. The GTZC (Global TrustZone Controller) manages peripheral security attribution, while the RDP (Readout Protection) and HDP (Hide Protection) mechanisms enforce flexible life-cycle control and root-of-trust integrity.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with 51 user I/Os, including 14 low-voltage-tolerant pins (1.08 V supply), most 5 V-tolerant, and 24 dedicated wake-up inputs. Pin functions validated per STMicroelectronics DS13543 Rev 3, Section 4.2.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power secure MCU applications.

Compared with STM32U5A5AJH6, the STM32U575ZIT6 trades DSI graphics capability for higher I/O count and BGA packaging flexibility, while the RA4M3GDB001 lacks both PSA Level 3 certification and hardware-accelerated DSI/LTDC - making the U5A5AJH6 uniquely suited for certified, graphics-enabled, ultra-low-power edge devices.

Availability

STM32U5A5AJH6 is available at Aetrix Electronics and suitable for smart medical wearables, industrial HMI displays, secure IoT edge gateways, and battery-powered smart sensors requiring stable component supply and long-term lifecycle support.

Supply support for STM32U5A5AJH6 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 analog components for industrial, automotive, and consumer markets.

The STM32U5 series is ST's flagship ultra-low-power, secure MCU product line targeting applications demanding PSA Level 3 certification, sub-μA standby operation, and integrated graphics - specifically engineered for next-generation battery-operated and safety-critical edge devices.

FAQ

What is the maximum operating frequency and associated performance metric for the STM32U5A5AJH6?

The STM32U5A5AJH6 operates at up to 160 MHz and delivers 240 DMIPS (Dhrystone 2.1), validated per STMicroelectronics DS13543 Rev 3. This performance is achieved with zero-wait-state execution from Flash using the 32-Kbyte ICACHE and ART Accelerator, enabling deterministic real-time response in motor control and sensor fusion workloads.

Does the STM32U5A5AJH6 support hardware-accelerated cryptography for TLS and secure boot?

Yes. It integrates dual AES coprocessors (one DPA-resistant), a public key accelerator (PKA), HASH engine, and True Random Number Generator (NIST SP800-90B compliant). These accelerate TLS 1.2/1.3 handshakes (SecureMark™-TLS = 120,000) and enable secure boot via embedded Root Secure Services (RSS) and hardware unique key (HUK) - all validated under PSA Level 3 and SESIP3 certification.

How does the STM32U5A5AJH6 manage power in ultra-low-power applications?

It employs FlexPowerControl with dual regulators (SMPS + LDO), LPBAM for autonomous peripheral operation down to Stop 2 mode, and seven low-power modes - including 150 nA Shutdown and 480 nA Standby with RTC. Voltage scaling and regulator switching occur dynamically, and VBAT mode retains RTC, 32×32-bit registers, and 2 KB SRAM during main power loss - verified per Section 3.9.3 of DS13543 Rev 3.

What display interfaces does the STM32U5A5AJH6 support, and what are their key capabilities?

The device supports MIPI® DSI host controller (2 lanes, up to 500 Mbit/s each) and LCD-TFT controller (LTDC) with 24-bit RGB output. It also integrates Neo-Chrom GPU (GPU2D), Chrom-ART Accelerator (DMA2D), and Chrom-GRC (GFXMMU) for hardware-accelerated rotation, scaling, transparency, and 20% graphics resource optimization - enabling responsive GUIs on embedded displays without external video processors.