Overview
The STM32L552RET6Q is a member of the STM32L5 Series of ultra-low-power microcontrollers from STMicroelectronics. It is based on the high-performance Arm® Cortex®-M33 32-bit RISC core, which includes a single-precision floating-point unit (FPU) and supports DSP instructions. This microcontroller is designed to operate at frequencies up to 110 MHz and features advanced security mechanisms, including Arm® TrustZone®, secure firmware installation, and protection against various attacks. The device is optimized for low-power applications, offering multiple power-saving modes and a wide range of peripherals for diverse applications.
Key Specifications
| Parameter | Specification |
|---|---|
| Core | Arm® 32-bit Cortex®-M33 CPU with TrustZone® and FPU |
| Frequency | Up to 110 MHz |
| Power Supply | 1.71 V to 3.6 V |
| Temperature Range | -40 °C to 85/125 °C |
| Flash Memory | Up to 512 KB |
| SRAM | 256 KB |
| ADC | 2 x 12-bit, 5 Msps |
| DAC | 2 x 12-bit |
| Timers | 16 timers (2 x 32-bit, 9 x 16-bit, 3 x low-power 16-bit, 2 x watchdogs) |
| Communication Peripherals | 1x USB Type-C™, 1x USB 2.0, 2x SAIs, 4x I2C, 6x USARTs, 3x SPIs, 1x FDCAN, 1x SDMMC |
| Package | LQFP 64 10x10x1.4 mm |
| SMPS | Internal SMPS step-down converter |
Key Features
- Ultra-low-power with FlexPowerControl and multiple power-saving modes (e.g., Shutdown, Standby, Stop 2 with RTC)
- Batch acquisition mode (BAM) and low-power RTC with hardware calendar, alarms, and calibration
- Advanced security features including Arm® TrustZone®, secure firmware installation, and protection against transient and environmental perturbations
- Rich analog peripherals: 2x operational amplifiers, 2x ultra-low-power comparators, and 4x digital filters for sigma delta modulators
- Up to 22 capacitive sensing channels supporting touch key, linear, and rotary touch sensors
- Comprehensive communication interfaces: USB Type-C™, USB 2.0, SAIs, I2C, USARTs, SPIs, FDCAN, and SDMMC
- Internal multispeed oscillator and PLLs for system clock, USB, audio, and ADC
- Development support: serial wire debug (SWD), JTAG, and Embedded Trace Macrocell™ (ETM)
Applications
- Industrial automation and control systems
- Smart energy management and metering
- Medical devices requiring low power and high security
- Point of Sale (POS) terminals and secure payment systems
- IoT devices and smart home applications
- Automotive systems, especially those requiring low power and advanced security
Q & A
- What is the core architecture of the STM32L552RET6Q?
The STM32L552RET6Q is based on the Arm® 32-bit Cortex®-M33 CPU with TrustZone® and a single-precision floating-point unit (FPU).
- What is the operating frequency range of the STM32L552RET6Q?
The device operates at frequencies up to 110 MHz.
- What are the power supply and temperature range specifications?
The power supply range is 1.71 V to 3.6 V, and the temperature range is -40 °C to 85/125 °C.
- What security features does the STM32L552RET6Q offer?
The device features Arm® TrustZone®, secure firmware installation, protection against transient and environmental perturbations, and a true random number generator.
- What types of communication peripherals are available on the STM32L552RET6Q?
The device includes USB Type-C™, USB 2.0, SAIs, I2C, USARTs, SPIs, FDCAN, and SDMMC interfaces.
- How many timers and watchdogs are available on the STM32L552RET6Q?
The device has 16 timers (including 2 x 32-bit, 9 x 16-bit, and 3 x low-power 16-bit timers) and 2 watchdogs.
- What is the purpose of the FlexPowerControl feature?
The FlexPowerControl feature allows for multiple power-saving modes, such as Shutdown, Standby, and Stop 2 with RTC, to optimize power consumption.
- Does the STM32L552RET6Q support capacitive sensing?
Yes, the device supports up to 22 capacitive sensing channels for touch key, linear, and rotary touch sensors.
- What development tools are supported by the STM32L552RET6Q?
The device supports serial wire debug (SWD), JTAG, and Embedded Trace Macrocell™ (ETM) for development.
- What are some typical applications for the STM32L552RET6Q?
Typical applications include industrial automation, smart energy management, medical devices, POS terminals, IoT devices, and automotive systems.
- How does the STM32L552RET6Q ensure secure data storage and firmware updates?
The device ensures secure data storage and firmware updates through features like secure firmware installation, secure firmware upgrade support with TF-M, and protection mechanisms for embedded Flash memory and SRAM.
