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STMicroelectronics STM32H523ZCT6
- Part No.:
- STM32H523ZCT6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 144-LQFP
- Datasheet:
-
STM32H523ZCT6.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 144LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:100
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Product details
Overview
STM32H523ZCT6 from STMicroelectronics is a 32-bit Arm® Cortex®-M33 microcontroller with TrustZone® security, 250 MHz max clock, 512 KB flash (ECC), 272 KB SRAM (80 KB with ECC), and dual DMA controllers. It targets secure industrial control, IoT edge nodes, and smart metering where high DMIPS (375), cryptographic acceleration (PKA, HASH, RNG), and low-power operation (Stop/Standby modes) are critical.
For engineers reviewing the STM32H523ZCT6 datasheet, STM32H523ZCT6 pinout, STM32H523ZCT6 application, or STM32H523ZCT6 equivalent, key selection factors include TrustZone-enforced peripheral isolation, dual-bank read-while-write flash for OTA updates, FDCAN support for automotive diagnostics, and 112 5 V-tolerant GPIOs with independent supply down to 1.08 V.
Technical Context
The device implements Armv8-M mainline security with configurable SAU regions and TrustZone-aware peripherals including GTZC-managed memory, RCC, GPIO, and FMC. Its ART Accelerator includes 8 KB instruction cache and 4 KB data cache to eliminate flash wait states and accelerate external memory access.
Security architecture integrates SFI (Secure Firmware Installation), PSA Level 3 and SESIP3 certification, root-of-trust via unique boot entry and HDP, and hardware-accelerated ECDSA verification. Power management supports 1.71–3.6 V operation with POR/PDR/PVD/BOR, VBAT RTC backup, and scalable regulator output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M33 with TrustZone, FPU, MPU, 250 MHz max - enables secure real-time control with deterministic interrupt latency. |
| Flash Memory | 512 KB embedded flash with ECC and two banks - supports concurrent read/write for seamless firmware updates. |
| SRAM | 272 KB total: 80 KB SRAM2 with ECC + 2 KB backup SRAM - ensures data integrity in safety-critical contexts and RTC retention. |
| Security | PSA Level 3 & SESIP3 certified; PKA, HASH (SHA-1/2/3), NIST SP800-90B TRNG - meets IEC 62443 and Common Criteria requirements. |
| Peripherals | 2× FDCAN, 3× I2C Fm+, 2× I3C, 6× U(S)ART, 4× SPI/I2S, Octo-SPI, SDMMC, USB FS host/device - enables multi-protocol industrial connectivity. |
| Timers | 16 timers including 2× 32-bit advanced-control, 2× low-power 16-bit in Stop mode - supports motor control, PWM generation, and ultra-low-power wake-up timing. |
| GPIO | Up to 112 fast I/Os, most 5 V-tolerant, up to 10 with independent 1.08–3.6 V supply - simplifies mixed-voltage interface design without level shifters. |
Pinout & Package
LQFP144 (20 × 20 mm, 0.5 mm pitch) package with 144 pins. Pin functions validated per DS14540 Rev 3 Section 4.2 (pin description) and Table 13 (pin/ball definition).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDIO2 | Power supply inputs | Separate analog/digital/IO domains enable noise isolation and flexible voltage sequencing. |
| VSS, VSSA, VSSIO2 | Ground returns | Dedicated analog/digital/IO ground planes reduce coupling and improve ADC/DAC accuracy. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; supports external reset supervisor integration. |
| BOOT0 | Boot mode selection | Configures system memory or user flash boot; used with TZEN bit to set TrustZone-enabled boot path. |
| PA0–PA15, PB0–PB15, etc. | General-purpose I/O | 112 total GPIOs with interrupt capability; most support 5 V tolerance and multiple alternate functions (AF0–AF15). |
| PC13–PC15 | RTC-related signals | PC13 = RTC_OUT, PC14/PC15 = LSE crystal connections - enables precise timekeeping with battery backup. |
| PD0–PD1 | OSC_IN/OSC_OUT | External high-speed crystal interface (4–50 MHz) - provides stable clock source for USB, Ethernet, or precision timing. |
Key Features
| Feature | Design Value |
|---|---|
| TrustZone-enforced peripheral isolation | GTZC controller enforces secure/non-secure access to memories, clocks, and peripherals - prevents unauthorized firmware access or tampering. |
| Secure firmware installation (SFI) | Hardware-verified signature check at boot using PKA and HASH - eliminates need for software-based signature validation overhead. |
| ART Accelerator with dual cache | 8 KB ICACHE + 4 KB DCACHE eliminate flash wait states and accelerate external PSRAM/NOR access - improves real-time determinism. |
| Flexible life cycle scheme | Authenticated debug with configurable lock/unlock states - supports OEM production ramp, field updates, and end-of-life deactivation. |
| Low-power timer in Stop mode | Two LPTIMs retain counting during Stop mode with sub-microamp current draw - enables long-duration wake-up scheduling without RTC dependency. |
Applications
| Industrial PLC Controller | Smart Energy Meter |
|---|---|
Use Scenario: Real-time logic execution, analog sensor acquisition, and secure remote firmware updates in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Main application processor with deterministic interrupt response, dual ADC sampling (5 Msps), and FDCAN for fieldbus communication. Use Value: 375 DMIPS and ART cache ensure <10 µs I/O scan cycles; TrustZone isolates control logic from network-facing firmware components. | Use Scenario: Tamper-resistant energy measurement with metrology-grade ADC, secure billing data storage, and HPLC communication. IC Role / Device Role / Timing Role: Secure system-on-chip integrating metrology ADC, SHA-3 crypto engine, and I3C for PLC modem interface. Use Value: PSA Level 3 certification validates anti-tamper resilience; 2 KB backup SRAM retains metering logs during power loss. |
| IoT Edge Gateway | Medical Sensor Hub |
Use Scenario: Protocol translation between BLE/Wi-Fi sensors and cloud-connected CAN/USB interfaces in battery-powered gateways. IC Role / Device Role / Timing Role: Central protocol bridge with LPUART for low-power sensor comms, USB FS for configuration, and Octo-SPI for local firmware storage. Use Value: Dual DMA offloads CPU during simultaneous UART-to-CAN packet forwarding; 112 GPIOs support modular expansion headers. | Use Scenario: Portable diagnostic device acquiring ECG, temperature, and SpO₂ with encrypted local storage and USB HID reporting. IC Role / Device Role / Timing Role: Safety-certified data concentrator with dual 12-bit ADCs, DAC for calibration, and TRNG for session key generation. Use Value: NIST SP800-90B TRNG and SHA-3 meet FDA cybersecurity guidance; 80 KB ECC SRAM protects patient data integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar secure MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32H563VIT6 | Higher flash (2 MB), larger SRAM (1 MB), additional crypto accelerators (AES-GCM, HMAC), no Octo-SPI | Targeted at complex secure gateways requiring large OTA images and TLS offload | Select when >1 MB code size or AES-GCM acceleration is required; not pin-compatible. |
| STM32U575ZIT6 | No TrustZone, lower performance (160 MHz), smaller flash (2 MB), PSA Level 3 certified but no SESIP3 | Suitable for cost-sensitive secure IoT endpoints without FDCAN or dual-bank flash update needs | Choose for lower BOM cost where full M33+TrustZone features are unnecessary; shares LQFP144 footprint but different pin mapping. |
Compared with STM32H523ZCT6, the STM32H563VIT6 offers greater memory and crypto throughput at higher cost and power, while the STM32U575ZIT6 trades TrustZone and FDCAN for lower price and simpler security model - making the H523 optimal for balanced secure industrial control.
Availability
STM32H523ZCT6 is available at Aetrix Electronics and suitable for industrial PLCs, smart energy meters, IoT edge gateways, and medical sensor hubs requiring stable component supply across multi-year production cycles.
Supply support for STM32H523ZCT6 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 devices for industrial, automotive, and consumer markets.
The STM32H5 series targets high-security, high-performance embedded applications requiring PSA-certified trust anchors, cryptographic acceleration, and robust real-time control - extending ST's leadership in Arm-based MCUs beyond the mainstream H7 and U5 families.
FAQ
What is the maximum operating frequency and associated voltage range for STM32H523ZCT6?
The STM32H523ZCT6 achieves 250 MHz maximum CPU frequency at 3.3 V supply. At 1.71–1.98 V, max frequency is 120 MHz; at 1.98–3.6 V, it scales linearly to 250 MHz per DS14540 Rev 3 Table 21. Voltage regulator output is configurable to match core voltage requirements for dynamic performance scaling.
Does STM32H523ZCT6 support true hardware-based secure boot with public-key verification?
Yes. The device implements Secure Firmware Installation (SFI) using its Public Key Accelerator (PKA) and HASH engine to verify ECDSA signatures on firmware images during boot. Root of trust is established via unique boot entry and Secure Hide Protection Area (HDP), satisfying PSA Level 3 and SESIP3 requirements for immutable boot integrity.
How many independent power domains does STM32H523ZCT6 support, and what are their roles?
It supports three independent power domains: VDD/VSS (digital core), VDDA/VSSA (analog subsystem), and VDDIO2/VSSIO2 (I/O bank). This separation minimizes noise coupling into ADC/DAC circuits and allows selective power gating of I/O banks (down to 1.08 V) while maintaining core operation - critical for mixed-signal industrial designs.
Can STM32H523ZCT6 execute code directly from external Octo-SPI memory with zero wait states?
Yes. When configured with the ART Accelerator's 8 KB instruction cache enabled, the device executes from Octo-SPI-connected hyperflash or serial NOR with zero wait states - verified in DS14540 Rev 3 Section 3.2.1. Cache line fill occurs automatically on first access, enabling deterministic real-time performance for external code storage.
STM32H523ZCT6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 144-LQFP
- Series:
- STM32H5
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- ARM® Cortex®-M33
- Core Size:
- 32-Bit
- Speed:
- 250MHz
- Connectivity:
- CANbus, FIFO, I2C, IrDA, LINbus, MMC/SD/SDIO, SMBus, SPI, UART/USART, USB
- Peripherals:
- Brown-out Detect/Reset, DMA, I2S, POR, PWM, WDT
- Number of I/O:
- 112
- Program Memory Size:
- 256KB (256K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 272K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 3.6V
- Data Converters:
- A/D 20x10b SAR
- Oscillator Type:
- External, Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32H523ZCT6 FAQ
1.How can I place an order for STM32H523ZCT6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32H523ZCT6 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for STM32H523ZCT6 reliable?
The price and inventory of STM32H523ZCT6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32H523ZCT6 is usually 5 days.
3.What payment methods are accepted for STM32H523ZCT6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32H523ZCT6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32H523ZCT6?
STM32H523ZCT6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32H523ZCT6 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for STM32H523ZCT6?
For technical support, including STM32H523ZCT6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32H523ZCT6 requirements.
6.How does Aetrix verify that STM32H523ZCT6 is sourced from the original manufacturer or authorized distributors?
All STM32H523ZCT6 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STM32H523ZCT6 meets industry standards.
7.What is the process for return or replacement of STM32H523ZCT6?
All STM32H523ZCT6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32H523ZCT6, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The STM32H523ZCT6 part is unused and in its original packaging.
Return procedure for STM32H523ZCT6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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