STM32H523CET6

Product Overview

The STM32H523CET6 is a high-performance 32-bit microcontroller from STMicroelectronics' STM32H5 series, based on the Arm Cortex-M33 core with TrustZone technology, floating-point unit (FPU), DSP instructions and memory protection unit (MPU).

Operating at up to 250 MHz, the STM32H523CET6 combines 512KB dual-bank Flash memory, 272KB SRAM, advanced analog peripherals, high-speed timers, extensive communication interfaces, USB Full-Speed, USB Type-C Power Delivery and strong hardware security features.

The device is designed for industrial control, embedded systems, connected devices, motor control, secure IoT equipment and other applications requiring high processing performance and security.

Key Features

• Arm Cortex-M33 32-bit RISC core

• Up to 250 MHz CPU frequency

• TrustZone for Armv8-M security

• Single-precision FPU

• DSP instruction set

• Memory Protection Unit (MPU)

• Up to 375 DMIPS / 1023 CoreMark

• 512KB dual-bank Flash memory with ECC

• 272KB SRAM

• 2KB OTP memory

• 8KB instruction cache

• 4KB data cache for external memory

• Two dual-port DMA controllers with FIFO

• Two 12-bit ADCs up to 5 Msps

• 12-bit dual-channel DAC

• Voltage reference buffer

• One USB 2.0 Full-Speed interface

• USB Type-C / USB Power Delivery controller

• Two FDCAN controllers

• Two I3C interfaces

• Up to four SPI interfaces

• Three USART interfaces plus UART/LPUART resources

• One Octo-SPI memory interface

• One SDMMC interface

• Advanced hardware security and secure-debug functions

• LQFP-48 package

• Industrial temperature range: -40°C to +85°C

Technical Specifications

The exact STM32H523CET6 ordering variant is specified by ST with an LQFP-48 7 × 7 × 1.4 mm package, tray packing and a -40°C to +85°C operating range.

Processor & Architecture

The STM32H523CET6 uses an Arm Cortex-M33 processor operating at up to 250 MHz. The core integrates a single-precision FPU, DSP instructions and MPU support for demanding embedded applications.

Arm TrustZone technology provides hardware-assisted separation between secure and non-secure application environments, making the device suitable for secure IoT, industrial and connected applications.

The STM32H5 architecture can achieve up to 375 DMIPS and 1023 CoreMark, with ST's ART Accelerator supporting high-performance execution from Flash memory.

Memory & Storage

The STM32H523CET6 provides:

• 512KB dual-bank embedded Flash

• Flash ECC support

• Read-while-write capability

• Up to 48KB per Flash bank with high-cycling capability

• 272KB SRAM

• SRAM2 with ECC

• 2KB backup SRAM

• 2KB OTP memory

• 8KB instruction cache

• 4KB data cache for external memory

• Octo-SPI external memory interface

• SDMMC interface

The dual-bank Flash architecture provides flexibility for firmware updates and data-storage applications.

Analog Peripherals

The device integrates advanced analog resources for control and measurement applications:

• Two 12-bit ADCs

• ADC conversion rate up to 5 Msps

• Up to 10 ADC channels on the exact 48-pin variant

• One 12-bit DAC with two channels

• Voltage reference buffer

• Digital temperature sensor

• Integrated analog support for embedded control applications

These resources make the STM32H523CET6 suitable for industrial sensing, power monitoring, motor-control feedback and mixed-signal embedded systems.

Timer & PWM Resources

The STM32H523CET6 provides a broad selection of timer peripherals:

• Multiple 16-bit general-purpose timers

• Two 32-bit general-purpose timers

• Two advanced motor-control PWM timers

• Low-power timers

• Basic timers

• Two watchdog timers

• SysTick timers

• Input capture, output compare and PWM functions

• Quadrature encoder support on applicable timers

The timer architecture supports motor control, power conversion, precise timing, PWM generation and industrial automation.

Communication & Connectivity

The STM32H523CET6 offers extensive communication connectivity:

• Up to 3 I²C interfaces with Fast-mode Plus

• 2 I3C interfaces

• 4 SPI interfaces

• 3 USART interfaces

• Additional UART resources

• Low-power UART

• Up to 3 I²S interfaces through SPI multiplexing

• 2 FDCAN controllers

• USB 2.0 Full-Speed host/device

• USB Type-C / USB Power Delivery

• SDMMC

• Octo-SPI

• HDMI-CEC

• Camera interface

• 16-bit parallel slave synchronous interface

These interfaces support industrial networks, sensors, displays, storage devices, USB peripherals and connected embedded systems.

Clock & Power Management

The STM32H523CET6 integrates multiple internal and external clock sources, including:

• 64 MHz HSI

• 48 MHz HSI48

• 4 MHz CSI

• 32 kHz LSI

• External HSE from 4 MHz to 50 MHz

• 32.768 kHz LSE

The device operates from a 1.62V to 3.6V supply and incorporates power-management functions including POR, PDR, PVD and BOR.

Low-Power Operation

The STM32H523CET6 supports multiple low-power operating modes for energy-sensitive embedded products:

• Sleep mode

• Stop mode

• Standby mode

• VBAT backup supply

• Low-power RTC operation

• Backup registers

• Backup SRAM

These features help reduce energy consumption in battery-powered, portable and always-on applications.

Power Management

The MCU integrates an embedded voltage regulator with configurable scalable output for supplying the digital circuitry.

Additional power-management functions include:

• 1.62V to 3.6V operating supply

• Independent analog supply support

• Dedicated USB 3.3V supply input

• Dedicated supply options for selected GPIO and SDMMC functions

• VBAT input for RTC and backup resources

• POR/PDR/PVD/BOR protection

Security & Data Integrity

Security is a major feature of the STM32H523CET6.

The device supports:

• Arm TrustZone

• Armv8-M security extension

• Secure and non-secure execution environments

• Secure debug authentication

• Configurable Security Attribution Unit (SAU)

• Securable peripherals

• Secure Firmware Installation (SFI)

• Secure firmware upgrade support with TF-M

• Secure Hide Protection Area (HDP)

• Public Key Accelerator

• ECDSA signature verification

• SHA-1, SHA-2 and SHA-3 HASH acceleration

• True Random Number Generator compliant with NIST SP800-90B

• 96-bit unique device ID

• Active tamper detection

• Flash ECC

• SRAM ECC on supported memory regions

ST specifies the STM32H523 security architecture with SESIP Level 3 and PSA Level 3 assurance targets.

Development & Debugging

The STM32H523CET6 supports professional embedded development and debugging through:

• Serial Wire Debug (SWD)

• JTAG

• Embedded Trace Macrocell (ETM)

• Authenticated debug

• Flexible device lifecycle management

• ST development ecosystem and STM32Cube software support

These features support development from initial prototyping through production firmware deployment.

Applications

The STM32H523CET6 is suitable for:

• Industrial automation

• Motor control

• Smart sensors

• Secure IoT devices

• Industrial networking

• Power management

• Building automation

• Consumer electronics

• USB-connected embedded equipment

• Smart metering

• Security-conscious control systems

• Human-machine interfaces

• Connected appliances

• Embedded gateways

Benefits

• High-performance 250 MHz Cortex-M33 processing

• Strong hardware security with TrustZone

• 512KB dual-bank Flash

• 272KB SRAM

• Advanced analog peripherals

• High-speed ADC and DAC resources

• FDCAN, I3C, USB and USB-C connectivity

• Extensive timer and PWM resources

• Flexible external-memory support

• Low-power operating modes

• Industrial-grade temperature range

• Compact LQFP-48 package

Packaging & Ordering Information

• Part Number: STM32H523CET6

• Manufacturer: STMicroelectronics

• Device Family: STM32H523CE

• Package: LQFP-48

• Package Code: LQFP 48 7x7x1.4 mm

• Package Quantity: Not specified for the exact tray ordering variant

• Supply Voltage: 1.62 V to 3.6 V

• Operating Temperature: -40°C to +85°C

• Packing Type: Tray

• Product Status: ACTIVE

• Grade: Industrial

• RoHS / Environmental: ECOPACK2

ST's official product and eStore listings confirm the exact STM32H523CET6 package, tray packing, supply range, temperature range and active status.

Datasheet

For complete electrical characteristics, pin configuration, memory architecture, ADC specifications, timer configuration, communication interfaces, absolute maximum ratings, security features, and application information, please refer to the official STMicroelectronics documentation.

Datasheet: Official STM32H523CET6 Datasheet

Frequently Asked Questions

What is the STM32H523CET6?
The STM32H523CET6 is a 250 MHz Arm Cortex-M33 microcontroller with TrustZone, 512KB Flash and 272KB SRAM.

How much Flash does the STM32H523CET6 have?
It provides 512KB of dual-bank embedded Flash memory with ECC.

How much RAM does the STM32H523CET6 have?
The device provides 272KB of SRAM, plus 2KB backup SRAM.

What package does STM32H523CET6 use?
The STM32H523CET6 uses a 48-pin LQFP package measuring 7 × 7 × 1.4 mm.

What is the operating temperature range?
The exact STM32H523CET6 variant is specified for -40°C to +85°C.

Does STM32H523CET6 support USB?
Yes. It includes a USB 2.0 Full-Speed host/device interface and a USB Type-C / USB Power Delivery controller.

Does STM32H523CET6 support CAN?
Yes. It includes two FDCAN controllers.

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