STMicroelectronics STM32L562CET6P

Overview

STM32L562CET6P 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-constrained IoT edge nodes requiring cryptographic acceleration (AES+PKA), tamper resistance, and sub-μA low-power modes.

For engineers reviewing the STM32L562CET6P datasheet, STM32L562CET6P pinout, STM32L562CET6P application, or STM32L562CET6P equivalent, key selection criteria include TrustZone-enabled secure boot, 17 nA shutdown current, on-the-fly Octo-SPI decryption, ULPMark-CP® score of 370, and LQFP48 package compatibility with legacy STM32L4/L5 footprint migration paths.

Technical Context

The STM32L562CET6P implements a dual-domain Arm Cortex-M33 core with separate secure/non-secure execution environments enforced by TrustZone® and a Global TrustZone Controller (GTZC). Its memory subsystem includes two independent Flash banks enabling seamless firmware updates and 256 KB SRAM with configurable parity protection for safety-critical data integrity.

Power architecture integrates both LDO and SMPS step-down converters, supporting dynamic voltage scaling and achieving 62 μA/MHz run-mode efficiency at 3 V. Low-power operation is enhanced by Batch Acquisition Mode (BAM), 3.16 μA Stop2 with RTC, and 187 nA VBAT mode retaining RTC and 32×32-bit backup registers.

Key Specifications

Pinout & Package

LQFP48 (7 × 7 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant and ECOPACK2 certified. Pin count: 48 leads, including 42 general-purpose I/Os (most 5 V-tolerant), 3 power supply pins (VDD, VDDA, VSS), 3 ground pins (VSS, VSSA, VREF+), and dedicated reset, boot, and clock inputs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L552RET6, the STM32L562CET6P adds UCPD, OTFDEC, and enhanced tamper protection - critical for USB-C PD endpoints and encrypted external storage. Versus STM32U575ZIT6, it trades AI acceleration and density for LQFP48 footprint compatibility and lower system-level thermal design complexity.

Availability

STM32L562CET6P is available at Aetrix Electronics and suitable for smart utility metering, secure wearables, industrial wireless sensor nodes, and USB-C power delivery endpoints requiring stable component supply across long product lifecycles.

Supply support for STM32L562CET6P 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 STM32L5 series is engineered for ultra-low-power, high-security embedded applications - combining Arm TrustZone®, advanced power gating, and hardware crypto accelerators to address IoT, medical, and industrial edge requirements.

FAQ

What is the maximum operating temperature for STM32L562CET6P?

The STM32L562CET6P is qualified for industrial and extended temperature ranges: –40°C to +125°C ambient. This rating applies to all LQFP48 variants and is validated per JEDEC JESD22-A108F. Thermal derating begins above 105°C ambient in high-power configurations; PCB layout must follow ST's AN5250 guidelines for thermal pad soldering and copper pour.

Does STM32L562CET6P support crystal-less USB operation?

Yes - the STM32L562CET6P integrates a crystal-less USB 2.0 full-speed PHY with internal clock recovery (CRS) synchronized to the 48 MHz HSI48 oscillator. This eliminates the need for an external 48 MHz crystal, reducing BOM cost and board space. USB enumeration is fully compliant with USB-IF test specifications when configured per RM0438 Section 48.5.3.

How many I/O pins support independent supply down to 1.08 V?

14 GPIOs (specifically PA0–PA7, PB0–PB7) support independent V_DDIO2 supply down to 1.08 V, enabling direct interfacing with low-voltage peripherals such as 1.2 V or 1.8 V sensors and memories. This capability is implemented via dedicated I/O power domains and requires proper decoupling per Section 5.1.6 of DS12736 Rev 5.

Is the 96-bit unique ID accessible from secure or non-secure world?

The 96-bit unique ID is readable only from the secure world when TrustZone® is enabled (TZEN=1); attempts from non-secure code return zeroed values. This behavior is enforced by the GTZC peripheral and documented in Section 3.7 of DS12736 Rev 5. The ID remains accessible in both worlds only when TrustZone is disabled - a configuration not recommended for production secure deployments.