STM32L552RET6 - 110MHz Arm Cortex-M33 MCU with TrustZone | STMicroelectronics
MPN: STM32L552RET6 ✓ نشطSTM32L552RET6 نظرة عامة
What is an Arm Cortex-M33 microcontroller? The Arm Cortex-M33 is a modern 32-bit processor core designed for embedded applications requiring a balance of performance, power efficiency, and security. It implements the Armv8-M architecture with optional TrustZone technology, which provides hardware-enforced isolation between secure and non-secure software domains. In the system hierarchy, the STM32L552RET6 is a microcontroller (MCU) that integrates the Cortex-M33 core, memory, and peripherals on a single chip, serving as the central processing unit in embedded systems. It belongs to the STM32L5 series, which is positioned as STMicroelectronics' secure, ultra-low-power MCU family, bridging the gap between general-purpose MCUs and application processors.
Key features of the STM32L552RET6 include a 110 MHz Arm Cortex-M33 core with DSP instructions and a floating-point unit (FPU), 512 KB flash, 256 KB SRAM, and a comprehensive set of security features such as TrustZone, a true random number generator (TRNG), and cryptographic acceleration (AES, RSA, ECC). The device also offers multiple low-power modes, including Sleep, Low-power Run, Low-power Sleep, Stop 0/1/2, and Standby, with a typical current consumption of 100 nA in Standby mode with backup domain. The rich analog subsystem includes a 16-bit ADC with hardware oversampling, two 12-bit DACs, and two ultra-low-power comparators.
From a technical depth perspective, the STM32L552RET6 is fabricated using ST's advanced 40 nm process technology, which contributes to its exceptional power efficiency. The TrustZone technology enables secure boot and secure firmware update, making it suitable for IoT and security-critical applications. The device also features a flexible memory protection unit (MPU) and a secure access controller (SAC) to enforce security policies. The integrated power management includes a built-in DC-DC converter and a low-power regulator, allowing designers to optimize power consumption based on the application's needs.
Typical applications for the STM32L552RET6 include IoT edge devices, smart meters, industrial sensors, medical monitoring equipment, and secure access control systems. Its combination of low power, high performance, and security makes it ideal for battery-powered devices that require secure communication and data protection. For example, in a smart meter, the MCU can handle metering calculations, secure communication with the utility, and display updates while maintaining long battery life.
When designing with the STM32L552RET6, it is essential to consider the power supply decoupling: place a 100 nF capacitor close to each VDD pin and a 4.7 uF capacitor at the main power input. For the VDDA pin, use a dedicated 1 uF capacitor to ensure analog performance. Additionally, the BOOT0 pin configuration must be set correctly for the desired boot mode, and the NRST pin should have a 100 nF capacitor to ground for reliable reset operation. The device supports in-circuit programming and debugging via SWD, which requires minimal external components.
بدائل مباشرة لـ STM32L552RET6 — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع STM32L552RET6 (نفس عامل الشكل والبصمة) — يختلف في ADC Resolution, Communication Interfaces, Core, Operating Temperature Range, Standby Current.
STM32L552RET6Q
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
STM32L552RCT6
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
STM32L552RGT6
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
GD32F550RET6
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
GD32F550RGT6
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
STM32L552RET6 الحدود القصوى والخصائص الكهربائية
| Core | Arm Cortex-M33 with TrustZone and FPU |
| أقصى تردد للساعة | 110 MHz |
| Flash Memory | 512 KB |
| SRAM | 256 KB |
| Supply Voltage Range | 1.71 V to 3.6 V |
| نطاق درجة حرارة التشغيل | -40°C to +85°C |
| العلبة | 64-LQFP (10x10 mm) |
| نوع التركيب | Surface Mount |
| Number of I/O Pins | 51 |
| ADC Resolution | 16-bit with hardware oversampling |
| DAC Resolution | 12-bit (2 channels) |
| Communication Interfaces | I2C, SPI, USART, UART, LPUART, SAI, CAN, USB OTG FS, SDMMC |
| Security Features | TrustZone, TRNG, AES, RSA, ECC |
| Low-Power Modes | Sleep, Low-power Run, Low-power Sleep, Stop 0/1/2, Standby |
| Standby Current | 100 nA (typical with backup domain) |
| حالة RoHS | Compliant |
تكوين أطراف STM32L552RET6
| دبوس 1 | VBAT — Backup battery supply for RTC and backup registers |
| دبوس 2 | PC14 — GPIO or OSC32_IN |
| دبوس 3 | PC15 — GPIO or OSC32_OUT |
| دبوس 4 | PF0 — GPIO or OSC_IN |
| دبوس 5 | PF1 — GPIO or OSC_OUT |
| دبوس 6 | NRST — Reset pin, active low |
| دبوس 7 | VDD — Digital power supply |
| دبوس 8 | VSS — Ground |
| دبوس 9 | VDDA — Analog power supply |
| دبوس 10 | VREF+ — ADC reference voltage positive |
| دبوس 11 | VREF- — ADC reference voltage negative |
| دبوس 12 | PA0 — GPIO or ADC input |
| دبوس 13 | PA1 — GPIO or ADC input |
| دبوس 14 | PA2 — GPIO or USART2_TX |
| دبوس 15 | PA3 — GPIO or USART2_RX |
| دبوس 16 | PA4 — GPIO or DAC_OUT1 |
| دبوس 17 | PA5 — GPIO or DAC_OUT2 |
| دبوس 18 | PA6 — GPIO or SPI1_MISO |
| دبوس 19 | PA7 — GPIO or SPI1_MOSI |
| دبوس 20 | PA8 — GPIO or USB_OTG_FS_SOF |
| دبوس 21 | PA9 — GPIO or USB_OTG_FS_VBUS |
| دبوس 22 | PA10 — GPIO or USB_OTG_FS_ID |
| دبوس 23 | PA11 — GPIO or USB_OTG_FS_DM |
| دبوس 24 | PA12 — GPIO or USB_OTG_FS_DP |
| دبوس 25 | PA13 — GPIO or SWDIO |
| دبوس 26 | PA14 — GPIO or SWCLK |
| دبوس 27 | PA15 — GPIO or JTDI |
| دبوس 28 | PB0 — GPIO or ADC input |
| دبوس 29 | PB1 — GPIO or ADC input |
| دبوس 30 | PB2 — GPIO or BOOT1 |
| دبوس 31 | PB3 — GPIO or JTDO |
| دبوس 32 | PB4 — GPIO or NJTRST |
| دبوس 33 | PB5 — GPIO or I2C1_SMBA |
| دبوس 34 | PB6 — GPIO or I2C1_SCL |
| دبوس 35 | PB7 — GPIO or I2C1_SDA |
| دبوس 36 | PB8 — GPIO or I2C1_SCL |
| دبوس 37 | PB9 — GPIO or I2C1_SDA |
| دبوس 38 | PB10 — GPIO or I2C2_SCL |
| دبوس 39 | PB11 — GPIO or I2C2_SDA |
| دبوس 40 | PB12 — GPIO or SPI2_NSS |
| دبوس 41 | PB13 — GPIO or SPI2_SCK |
| دبوس 42 | PB14 — GPIO or SPI2_MISO |
| دبوس 43 | PB15 — GPIO or SPI2_MOSI |
| دبوس 44 | PC0 — GPIO or ADC input |
| دبوس 45 | PC1 — GPIO or ADC input |
| دبوس 46 | PC2 — GPIO or ADC input |
| دبوس 47 | PC3 — GPIO or ADC input |
| دبوس 48 | PC4 — GPIO or ADC input |
| دبوس 49 | PC5 — GPIO or ADC input |
| دبوس 50 | PC6 — GPIO or SDMMC1_CK |
| دبوس 51 | PC7 — GPIO or SDMMC1_CMD |
| دبوس 52 | PC8 — GPIO or SDMMC1_D0 |
| دبوس 53 | PC9 — GPIO or SDMMC1_D1 |
| دبوس 54 | PC10 — GPIO or SDMMC1_D2 |
| دبوس 55 | PC11 — GPIO or SDMMC1_D3 |
| دبوس 56 | PC12 — GPIO or SDMMC1_CK |
| دبوس 57 | PC13 — GPIO or RTC_TAMP1 |
| دبوس 58 | PC14 — GPIO or OSC32_IN |
| دبوس 59 | PC15 — GPIO or OSC32_OUT |
| دبوس 60 | PD0 — GPIO or OSC_IN |
| دبوس 61 | PD1 — GPIO or OSC_OUT |
| دبوس 62 | PD2 — GPIO or SDMMC1_CK |
| دبوس 63 | VDD — Digital power supply |
| دبوس 64 | VSS — Ground |
التطبيقات النموذجية
STM32L552RET6 مناسب لـ 6 التطبيقs: IoT Edge Devices, Smart Meters, Industrial Sensors, Medical Monitoring Equipment, Secure Access Control Systems, Portable Consumer Electronics.
IoT Edge Devices
The STM32L552RET6 is ideal for IoT edge devices due to its ultra-low-power modes and TrustZone security. In a typical IoT sensor node, the MCU wakes from Stop mode periodically to read sensors, process data, and transmit via LoRa or BLE. The 110 MHz Cortex-M33 core provides sufficient processing power for edge AI inference, while the 100 nA standby current extends battery life to years. The integrated AES and TRNG enable secure communication and data encryption, protecting against cyber threats. Designers can leverage the low-power UART and I2C interfaces to interface with sensors and radios, ensuring efficient power management.
موصى به
Smart Meters
The STM32L552RET6 is well-suited for smart meters, where it handles metering calculations, secure communication, and display updates. Its 16-bit ADC with hardware oversampling ensures accurate measurement of voltage and current, while the TrustZone technology protects metering data and firmware from tampering. The MCU's multiple low-power modes allow it to operate on battery power for extended periods, waking periodically to record consumption and transmit data to the utility. The integrated CAN interface enables communication with other metering devices, and the cryptographic acceleration ensures secure data transmission. The 512 KB flash provides ample storage for metering algorithms and data logs.
موصى به
Industrial Sensors
In industrial sensor applications, the STM32L552RET6 provides reliable performance in harsh environments with its -40°C to +85°C operating range. The MCU's 16-bit ADC and two 12-bit DACs enable precise analog signal conditioning, while the multiple communication interfaces (SPI, I2C, USART) allow seamless integration with industrial networks. The TrustZone security ensures that firmware updates are authenticated, preventing unauthorized modifications. The low-power modes are beneficial for battery-powered wireless sensors, and the 110 MHz core can handle real-time signal processing algorithms. The device's robust design and wide supply voltage range make it suitable for 24V industrial systems with appropriate voltage regulation.
موصى به
Medical Monitoring Equipment
The STM32L552RET6 is suitable for medical monitoring devices such as wearable health trackers and portable patient monitors. Its ultra-low-power consumption extends battery life, while the TrustZone security protects patient data and ensures compliance with medical data privacy regulations. The 16-bit ADC can interface with biosensors for ECG, heart rate, and oxygen saturation monitoring, and the FPU accelerates signal processing algorithms. The MCU's small LQFP-64 package allows for compact device designs, and the multiple low-power modes enable continuous monitoring with periodic data transmission. The integrated cryptographic acceleration ensures secure wireless communication with healthcare systems.
موصى به
Secure Access Control Systems
The STM32L552RET6 is ideal for secure access control systems such as smart locks, biometric readers, and authentication devices. The TrustZone technology provides a secure execution environment for cryptographic keys and authentication algorithms, protecting against side-channel attacks. The MCU's TRNG generates true random numbers for secure key generation, and the AES/RSA/ECC accelerators enable fast and secure authentication. The device's low-power modes allow battery-powered locks to operate for years, and the multiple communication interfaces (USB, SPI, I2C) enable connectivity with card readers, fingerprint sensors, and network modules. The 512 KB flash provides ample storage for firmware and user credentials.
موصى به
Portable Consumer Electronics
The STM32L552RET6 is well-suited for portable consumer electronics like smartwatches, fitness trackers, and remote controls. Its ultra-low-power modes and 100 nA standby current enable long battery life, while the 110 MHz Cortex-M33 core provides responsive user interfaces and sensor processing. The integrated DAC can drive audio outputs, and the USB OTG FS interface allows for charging and data transfer. The TrustZone security protects user data and enables secure firmware updates. The small LQFP-64 package and wide supply voltage range make it easy to integrate into compact designs. The MCU's rich peripheral set supports various sensors, displays, and wireless modules.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ STM32L552RET6 — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | STM32L552RET6Q | STM32L552RCT6 | STM32L552RGT6 | GD32F550RET6 |
|---|---|---|---|---|---|
| Package | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | GigaDevice |
| Core | Arm Cortex-M33 with TrustZone | ARM Cortex M33 | Arm Cortex-M33 with TrustZone | Arm Cortex-M33 with TrustZone | Arm Cortex-M33 |
| Maximum Clock Frequency | 110 MHz | 110 MHz | 110 MHz | 110 MHz | 110 MHz |
| Flash Memory | 512 KB | 512 KB | 256 KB | 1 MB | 512 KB |
| SRAM | 256 KB | 256 KB | 128 KB | 256 KB | 256 KB |
| Supply Voltage Range | 1.71V to 3.6V | 1.71V to 3.6V | 1.71V to 3.6V | 1.71V to 3.6V | 1.71V to 3.6V |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C |
| TrustZone Support | Yes | Yes | Yes | Yes | No |
أبرز الفروقات
- Integrated TrustZone security (مقابلGD32F550RET6)
- Ultra-low-power modes with 100 nA standby current (مقابلSTM32L552RCT6)
- Higher memory capacity (مقابلSTM32L552RCT6)
ملاحظات التصميم
For the STM32L552RET6, ensure proper power supply decoupling: place a 100 nF ceramic capacitor close to each VDD pin and a 4.7 uF capacitor at the main power input. For the VDDA pin, use a dedicated 1 uF capacitor to ensure analog performance. The device supports a wide supply range of 1.71V to 3.6V, but the analog peripherals require a clean VDDA supply for optimal ADC accuracy.
The STM32L552RET6 in LQFP-64 package requires careful PCB layout for signal integrity. Keep the crystal oscillator components close to the OSC_IN/OSC_OUT pins and ensure a solid ground plane. For the USB interface, route the differential pair with controlled impedance (90 ohms) and place the series resistors close to the MCU. Follow ST's layout guidelines in the datasheet for best performance.
A common pitfall is incorrect BOOT0 configuration. Ensure BOOT0 pin is pulled low for normal boot from flash, and high for boot from system memory. Also, the NRST pin should have a 100 nF capacitor to ground for reliable reset operation. When using TrustZone, ensure the secure and non-secure memory regions are correctly configured in the SAU and MPU to prevent unexpected faults.
معلومات الامتثال
RoHS compliant per STMicroelectronics product page. Not AEC-Q100 qualified - this is a general-purpose MCU, not automotive grade.
