STMicroelectronics STM32L562QEI6Q

Overview

STM32L562QEI6Q from STMicroelectronics is an ultra-low-power Arm® Cortex®-M33 32-bit microcontroller with TrustZone® security, FPU, and SMPS support. It delivers 165 DMIPS at up to 110 MHz, integrates 512 KB Flash (dual-bank read-while-write), 256 KB SRAM (64 KB with hardware parity), and operates from 1.71 V to 3.6 V across –40°C to 125°C. It targets secure, battery-powered edge nodes such as industrial wireless sensors and medical wearables requiring cryptographic acceleration and sub-μA standby.

For engineers reviewing the STM32L562QEI6Q datasheet, STM32L562QEI6Q pinout, STM32L562QEI6Q application, or STM32L562QEI6Q equivalent, key selection considerations include TrustZone-enabled secure boot, AES+PKA coprocessors, 222 nA standby with RTC, 62 μA/MHz SMPS-run efficiency, and dual 12-bit ADCs with 5 Msps sampling - all in a 81-ball WLCSP package.

Technical Context

The device implements Arm TrustZone® at the system level, enabling hardware-isolated secure and non-secure execution environments with configurable memory attribution via SAU and GTZC. Its dual-bank Flash supports seamless firmware updates with atomic swap, while the embedded SMPS step-down converter replaces external DC/DC for optimized power delivery down to 1.08 V core voltage.

Security is anchored by root-of-trust features: unique boot entry, hide protection area (HDP), secure firmware installation (SFI) via embedded RSS, and TF-M–compliant secure firmware upgrade. Cryptographic acceleration includes AES-128/192/256, SHA-1/SHA-224/SHA-256 HASH, NIST SP800-90B–compliant TRNG, and public key accelerator (PKA) for ECC and RSA operations.

Key Specifications

Pinout & Package

STM32L562QEI6Q is housed in a 81-ball WLCSP (Wafer-Level Chip Scale Package) with 0.4 mm ball pitch and 4.36 × 4.07 mm body size, optimized for minimal PCB area and thermal performance in ultra-thin applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32U575ZIT6 and LPC55S69JBD100, STM32L562QEI6Q uniquely balances ultra-low static power (222 nA Standby+RTC), integrated SMPS, and full TrustZone system security in a compact WLCSP - making it optimal for long-life, physically constrained, and security-certifiable edge devices.

Availability

STM32L562QEI6Q is available at Aetrix Electronics and suitable for industrial wireless sensors, portable medical monitors, smart utility meters, and secure asset trackers requiring stable component supply across extended product lifecycles.

Supply support for STM32L562QEI6Q 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 products for industrial, automotive, and consumer markets.

The STM32L5 series is ST's flagship ultra-low-power secure MCU line, engineered specifically for battery-operated IoT endpoints demanding PSA Certified Level 3 security, sub-μA power states, and cryptographic acceleration without external co-processors.

FAQ

What is the maximum operating frequency and corresponding power supply configuration for STM32L562QEI6Q?

The STM32L562QEI6Q achieves 110 MHz maximum CPU frequency using the internal 48 MHz oscillator with PLL multiplication, supplied from the embedded SMPS step-down converter at 1.26 V core voltage. This configuration delivers 62 μA/MHz efficiency and requires external SMPS components (inductor, capacitor) per Table 9 in DS12736 Rev 5.

How does TrustZone® implementation differ between STM32L562QEI6Q and legacy STM32L4 devices?

Unlike STM32L4's software-managed security, STM32L562QEI6Q uses hardware-enforced TrustZone® with Global TrustZone Controller (GTZC), TrustZone Security Controller (TZSC), and SAU - enabling automatic peripheral/memory attribution, secure boot ROM with HDP, and SFI via embedded Root Secure Services (RSS). This meets PSA Certified Level 3 requirements out of the box.

Which low-power mode supports both RTC operation and fastest wakeup time, and what is the measured current?

Stop 2 mode supports RTC operation with 3.16 μA typical current consumption and 5 µs wakeup time from standby. It retains SRAM content and selected peripherals while disabling CPU, flash, and most clocks - verified per Table 10 and Section 5.3.7 of DS12736 Rev 5.

Can STM32L562QEI6Q directly interface with external Octo-SPI memories while maintaining data confidentiality?

Yes - the on-the-fly decryption engine (OTFDEC) decrypts Octo-SPI reads in real time using AES-128/192/256 keys stored in secure memory. Decryption occurs before data reaches the bus, preventing exposure of plaintext external memory contents even during DMA transfers or cache line fills.