STM32L552RET6 - 110MHz Arm Cortex-M33 MCU with TrustZone | STMicroelectronics
MPN: STM32L552RET6 ✓ Hoạt độngSTM32L552RET6 Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho STM32L552RET6 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với STM32L552RET6 (cùng hình factor và footprint) — khác nhau ở ADC Resolution, Communication Interfaces, Core, Operating Temperature Range, Standby Current.
STM32L552RET6Q
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
STM32L552RCT6
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
STM32L552RGT6
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
GD32F550RET6
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
GD32F550RGT6
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
STM32L552RET6 Tỷ lệ tối đa & tính chất điện
| Core | Arm Cortex-M33 with TrustZone and FPU |
| Tần số xung maksimum | 110 MHz |
| Flash Memory | 512 KB |
| SRAM | 256 KB |
| Supply Voltage Range | 1.71 V to 3.6 V |
| Khoảng nhiệt độ hoạt động | -40°C to +85°C |
| Hộp | 64-LQFP (10x10 mm) |
| Kiểu lắp đặt | 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) |
| Trạng thái RoHS | Compliant |
Cấu hình chân STM32L552RET6
| Chân 1 | VBAT — Backup battery supply for RTC and backup registers |
| Chân 2 | PC14 — GPIO or OSC32_IN |
| Chân 3 | PC15 — GPIO or OSC32_OUT |
| Chân 4 | PF0 — GPIO or OSC_IN |
| Chân 5 | PF1 — GPIO or OSC_OUT |
| Chân 6 | NRST — Reset pin, active low |
| Chân 7 | VDD — Digital power supply |
| Chân 8 | VSS — Ground |
| Chân 9 | VDDA — Analog power supply |
| Chân 10 | VREF+ — ADC reference voltage positive |
| Chân 11 | VREF- — ADC reference voltage negative |
| Chân 12 | PA0 — GPIO or ADC input |
| Chân 13 | PA1 — GPIO or ADC input |
| Chân 14 | PA2 — GPIO or USART2_TX |
| Chân 15 | PA3 — GPIO or USART2_RX |
| Chân 16 | PA4 — GPIO or DAC_OUT1 |
| Chân 17 | PA5 — GPIO or DAC_OUT2 |
| Chân 18 | PA6 — GPIO or SPI1_MISO |
| Chân 19 | PA7 — GPIO or SPI1_MOSI |
| Chân 20 | PA8 — GPIO or USB_OTG_FS_SOF |
| Chân 21 | PA9 — GPIO or USB_OTG_FS_VBUS |
| Chân 22 | PA10 — GPIO or USB_OTG_FS_ID |
| Chân 23 | PA11 — GPIO or USB_OTG_FS_DM |
| Chân 24 | PA12 — GPIO or USB_OTG_FS_DP |
| Chân 25 | PA13 — GPIO or SWDIO |
| Chân 26 | PA14 — GPIO or SWCLK |
| Chân 27 | PA15 — GPIO or JTDI |
| Chân 28 | PB0 — GPIO or ADC input |
| Chân 29 | PB1 — GPIO or ADC input |
| Chân 30 | PB2 — GPIO or BOOT1 |
| Chân 31 | PB3 — GPIO or JTDO |
| Chân 32 | PB4 — GPIO or NJTRST |
| Chân 33 | PB5 — GPIO or I2C1_SMBA |
| Chân 34 | PB6 — GPIO or I2C1_SCL |
| Chân 35 | PB7 — GPIO or I2C1_SDA |
| Chân 36 | PB8 — GPIO or I2C1_SCL |
| Chân 37 | PB9 — GPIO or I2C1_SDA |
| Chân 38 | PB10 — GPIO or I2C2_SCL |
| Chân 39 | PB11 — GPIO or I2C2_SDA |
| Chân 40 | PB12 — GPIO or SPI2_NSS |
| Chân 41 | PB13 — GPIO or SPI2_SCK |
| Chân 42 | PB14 — GPIO or SPI2_MISO |
| Chân 43 | PB15 — GPIO or SPI2_MOSI |
| Chân 44 | PC0 — GPIO or ADC input |
| Chân 45 | PC1 — GPIO or ADC input |
| Chân 46 | PC2 — GPIO or ADC input |
| Chân 47 | PC3 — GPIO or ADC input |
| Chân 48 | PC4 — GPIO or ADC input |
| Chân 49 | PC5 — GPIO or ADC input |
| Chân 50 | PC6 — GPIO or SDMMC1_CK |
| Chân 51 | PC7 — GPIO or SDMMC1_CMD |
| Chân 52 | PC8 — GPIO or SDMMC1_D0 |
| Chân 53 | PC9 — GPIO or SDMMC1_D1 |
| Chân 54 | PC10 — GPIO or SDMMC1_D2 |
| Chân 55 | PC11 — GPIO or SDMMC1_D3 |
| Chân 56 | PC12 — GPIO or SDMMC1_CK |
| Chân 57 | PC13 — GPIO or RTC_TAMP1 |
| Chân 58 | PC14 — GPIO or OSC32_IN |
| Chân 59 | PC15 — GPIO or OSC32_OUT |
| Chân 60 | PD0 — GPIO or OSC_IN |
| Chân 61 | PD1 — GPIO or OSC_OUT |
| Chân 62 | PD2 — GPIO or SDMMC1_CK |
| Chân 63 | VDD — Digital power supply |
| Chân 64 | VSS — Ground |
Ứng dụng tiêu biểu
STM32L552RET6 phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho STM32L552RET6 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- Integrated TrustZone security (vsGD32F550RET6)
- Ultra-low-power modes with 100 nA standby current (vsSTM32L552RCT6)
- Higher memory capacity (vsSTM32L552RCT6)
Ghi chú thiết kế
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.
Thông tin tuân thủ
RoHS compliant per STMicroelectronics product page. Not AEC-Q100 qualified - this is a general-purpose MCU, not automotive grade.
