STM32H523RCT7

Product Overview

The STM32H523RCT7 is a high-performance 32-bit microcontroller from STMicroelectronics based on the Arm Cortex-M33 processor with TrustZone technology and a floating-point unit (FPU). Operating at up to 250 MHz, it integrates 256KB of Flash memory and 272KB of RAM, providing processing performance for demanding embedded control and connected-device applications.

Part of the STM32H5 series, the STM32H523RCT7 combines efficient processing with hardware security features, advanced analog peripherals, high-speed communication interfaces and flexible memory connectivity. Its integrated USB Full-Speed interface, USB Type-C and USB Power Delivery support, dual FDCAN interfaces and external memory controller make it suitable for industrial control, smart appliances, communication equipment and embedded automation.

The exact STM32H523RCT7 uses an LQFP-64 package and supports an extended operating temperature range of -40°C to +105°C. STMicroelectronics lists this ordering variant as an active product.

Key Features

• 32-bit Arm Cortex-M33 processor

• CPU frequency up to 250 MHz

• Arm TrustZone security technology

• Floating-point unit (FPU)

• Memory Protection Unit (MPU)

• 256KB embedded Flash memory with ECC

• 272KB SRAM, including an ECC-protected SRAM region

• 8KB instruction cache

• 4KB data cache for external memories

• External memory controller

• Octo-SPI interface

• SD/SDIO/MMC interface

• Two 12-bit ADCs across the device family

• One 12-bit DAC with two output channels

• USB 2.0 Full-Speed host and device support

• USB Type-C and USB Power Delivery support

• Two FDCAN interfaces

• Multiple SPI, I²C and USART interfaces

• Hardware hash and public-key cryptographic resources

• CRC calculation unit

• Serial Wire Debug (SWD) and JTAG

• Supply voltage from 1.71V to 3.6V

• Operating temperature from -40°C to +105°C

• LQFP-64 package

• ECOPACK2 compliant

These features are based on the STM32H523 family documentation. Exact peripheral availability and electrical limits should be confirmed against the official datasheet.

Technical Specifications

ST confirms the exact STM32H523RCT7 uses an LQFP-64 package measuring 10 × 10 × 1.4 mm, has 256KB Flash and 272KB RAM, and is rated for operation from -40°C to +105°C.

Processor & Architecture

The STM32H523RCT7 integrates an Arm Cortex-M33 processor running at up to 250 MHz. The processor combines a floating-point unit with a Memory Protection Unit and Arm TrustZone security technology to support efficient computation and isolation between secure and non-secure software.

The ART Accelerator includes an 8KB instruction cache to improve execution performance from Flash memory. A 4KB data cache supports external-memory access.

These architectural features make the MCU suitable for real-time control, embedded communications, security-aware applications and systems that require responsive processing with controlled memory access.

Memory & Storage

The STM32H523RCT7 provides integrated memory resources for application firmware, runtime data and secure embedded software.

• 256KB embedded Flash memory with ECC

• 272KB SRAM

• ECC protection for the specified SRAM region

• 2KB one-time-programmable memory

• 2KB backup SRAM

• 8KB instruction cache

• 4KB data cache for external memories

• External memory controller

• Octo-SPI interface

• SD/SDIO/MMC interface

The external memory controller supports compatible memory technologies such as SRAM, PSRAM, FRAM, NOR Flash and NAND Flash, subject to interface configuration and device requirements.

The integrated memory resources support embedded firmware, communication stacks, control algorithms and data buffers. External memory interfaces provide additional flexibility for applications requiring more storage or working memory.

Analog Peripherals

The STM32H523 family integrates analog peripherals for sensor acquisition, voltage measurement and embedded control.

• Two 12-bit ADCs

• ADC conversion performance up to 5 MSPS under specified conditions

• One 12-bit DAC with two output channels

• Internal voltage-reference buffer

• Digital temperature sensor

• Analog input support for measurement and monitoring

• Peripheral resources for control and signal acquisition

These features support sensor interfaces, power monitoring, process control and measurement equipment. Actual ADC channel availability and conversion performance depend on the device configuration and operating conditions.

Timer & PWM Resources

The STM32H523RCT7 provides timer resources for accurate timing, waveform generation and real-time control.

• Multiple 16-bit general-purpose timers

• Two 32-bit timers

• Advanced-control motor-control timers

• Input capture and output compare

• PWM generation

• Quadrature encoder input on supported timers

• Low-power timers

• Independent and window watchdogs

• Real-time clock

• SysTick timer

These timer resources support motor and actuator control, pulse measurement, event timing, waveform generation and other real-time embedded applications. Consult the reference manual for exact timer channels and pin assignments.

Communication & Connectivity

The STM32H523RCT7 provides multiple communication interfaces for connecting sensors, memory devices, external controllers and USB accessories.

• USB 2.0 Full-Speed host and device interface

• USB Type-C and USB Power Delivery support

• Two FDCAN interfaces

• SPI interfaces

• I²C interfaces

• USART interfaces

• Octo-SPI external memory interface

• SD/SDIO/MMC interface

• HDMI-CEC interface

• Serial Wire Debug (SWD)

• JTAG debugging

• Embedded Trace Macrocell support

These interfaces support industrial communication, USB-connected peripherals, external memory expansion and embedded control systems. Available interface functions depend on pin multiplexing and peripheral configuration.

Clock & Power Management

The STM32H523RCT7 includes flexible clock-generation and power-management resources.

• Internal 64MHz high-speed oscillator

• Internal 48MHz oscillator

• Internal 4MHz oscillator

• Internal 32kHz low-speed oscillator

• External high-speed crystal oscillator support

• External 32.768kHz low-speed crystal oscillator support

• Phase-locked loop (PLL) clock generation

• Power-on and power-down reset

• Programmable voltage detector

• Brownout reset

• Peripheral clock management

• VBAT supply for RTC and backup registers

These features allow developers to configure system timing and power behavior for different application requirements. Refer to the official datasheet for oscillator tolerances, clock limits and supply specifications.

Low-Power Operation

The STM32H523RCT7 includes low-power operating modes to reduce energy consumption when full processing performance is not required.

• Sleep mode

• Stop mode

• Standby mode

• Peripheral clock management

• RTC wake-up capability

• Backup SRAM retention in supported modes

• VBAT supply for RTC and backup registers

These capabilities help support energy-conscious industrial controllers, smart appliances and connected embedded devices.

Power Management

The STM32H523RCT7 operates from a supply voltage of 1.71V to 3.6V.

• Supply voltage: 1.71V to 3.6V

• Power-on and power-down reset

• Programmable voltage detector

• Brownout reset

• Peripheral clock gating

• Multiple low-power operating modes

• VBAT supply for supported backup functions

Power-supply design should follow STMicroelectronics' recommendations for decoupling, grounding and PCB layout. Consult the datasheet for electrical limits and current consumption under different operating conditions.

Security & Data Integrity

The STM32H523RCT7 integrates security features intended to support secure embedded applications and improve data integrity.

• Arm TrustZone security architecture

• Secure and non-secure execution environments

• Memory Protection Unit

• Hardware cryptographic hash resources

• Public-key cryptographic acceleration resources

• Flash ECC

• ECC protection for the specified SRAM region

• CRC calculation unit

• Secure debugging and device lifecycle controls

• Unique device identification

The STM32H523 product line should not be confused with STM32H533 devices, which provide additional cryptographic acceleration capabilities. Verify the required security functions against the exact STM32H523 documentation before selecting the MCU for a security-sensitive design.

Development & Debugging

The STM32H523RCT7 is supported by the STM32 development ecosystem, including configuration tools, firmware libraries and debugging hardware.

Development resources include:

• STM32CubeIDE

• STM32CubeMX

• STM32CubeH5 software package

• ST-LINK programming and debugging tools

• Serial Wire Debug (SWD)

• JTAG debugging

• Embedded Trace Macrocell support

• Official datasheets and reference manuals

• Application notes and firmware examples

These resources help engineers configure peripherals, implement security-aware firmware and develop embedded applications using the STM32H5 platform.

Applications

The STM32H523RCT7 is suitable for applications such as:

• Industrial automation

• Industrial controllers

• Smart appliances

• USB-connected equipment

• Communication gateways

• Secure embedded systems

• Motor and actuator control

• Sensor monitoring

• Data acquisition

• Building automation

• Embedded networking

• General-purpose high-performance embedded systems

Benefits

• 250MHz Cortex-M33 processing performance

• 256KB embedded Flash memory

• 272KB RAM

• Arm TrustZone security architecture

• Floating-point processing

• Hardware cryptographic hash and public-key resources

• ECC-protected memory resources

• USB Full-Speed and USB Power Delivery support

• Dual FDCAN interfaces

• External memory expansion capabilities

• Integrated ADC and DAC resources

• LQFP-64 package

• Extended industrial temperature range up to +105°C

• STM32Cube development ecosystem

Packaging & Ordering Information

• Part Number: STM32H523RCT7

• Manufacturer: STMicroelectronics

• Device Family: STM32H523RC

• Package: LQFP-64

• Package Code: LQFP64

• Package Size: 10 × 10 × 1.4 mm

• Packing Type: Confirm with supplier when ordering

• Supply Voltage: 1.71V to 3.6V

• Operating Temperature: -40°C to +105°C

• Product Status: Active

• Grade: Industrial

• RoHS: ECOPACK2

STMicroelectronics identifies STM32H523RCT7 as an active, industrial-grade LQFP-64 device. The separate STM32H523RCT7TR ordering code denotes a different packing variant and should not replace the exact requested part number.

Datasheet

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

Datasheet: Official STM32H523RC Datasheet

Frequently Asked Questions

What is the STM32H523RCT7?

The STM32H523RCT7 is a 32-bit Arm Cortex-M33 microcontroller from STMicroelectronics with TrustZone, a 250MHz CPU, 256KB Flash and 272KB RAM.

What is the maximum CPU frequency?

The maximum CPU frequency is 250 MHz.

How much Flash memory does the STM32H523RCT7 have?

It provides 256KB of embedded Flash memory.

How much RAM does the STM32H523RCT7 have?

It provides 272KB of RAM.

Does the STM32H523RCT7 support TrustZone?

Yes. It integrates Arm TrustZone technology to support secure and non-secure execution environments.

What package does the STM32H523RCT7 use?

The exact part uses an LQFP-64 package measuring 10 × 10 × 1.4 mm.

What is the operating voltage?

The specified supply-voltage range is 1.71V to 3.6V.

What is its operating temperature range?

The STM32H523RCT7 is specified for operation from -40°C to +105°C.

Is the STM32H523RCT7 an active product?

Yes. STMicroelectronics lists the exact ordering variant as active and in volume production.

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