Overview
The STM32L451REY6TR is an ultra-low-power microcontroller from STMicroelectronics, based on the high-performance Arm® Cortex®-M4 32-bit RISC core. This MCU operates at a frequency of up to 80 MHz and features a Floating Point Unit (FPU) that supports all Arm® single-precision data-processing instructions and data types. It also includes a full set of DSP instructions and a Memory Protection Unit (MPU) for enhanced application security.
The device is designed for low-power applications, with a power supply range of 1.71 to 3.6 V and an operating temperature range of -40 °C to 85/125 °C. It includes high-speed memories such as up to 512 Kbyte of Flash memory and 160 Kbyte of SRAM, along with a Quad SPI Flash memories interface.
Key Specifications
| Specification | Details |
|---|---|
| Core | Arm® 32-bit Cortex®-M4 CPU with FPU, up to 80 MHz |
| Memory | Up to 512 KB Flash, 160 KB SRAM |
| Power Supply | 1.71 V to 3.6 V |
| Operating Temperature | -40 °C to 85/125 °C |
| ADC | 12-bit, 5 Msps |
| DAC | 1x 12-bit output channel |
| Timers | 1x 32-bit, 5x 16-bit, 2x low-power 16-bit timers |
| Communication Interfaces | 4x I2C, 3x SPI, 3x USART, 1x UART, 1x LPUART, 1x SAI, 1x SDMMC, 1x CAN |
| Capacitive Sensing Channels | Up to 21 channels |
| Power Modes | VBAT mode: 145 nA, Shutdown mode: 22 nA, Standby mode: 106 nA, Stop 2 mode: 2.05 µA |
| Package | WLCSP 64 3.4x3.7x0.6 P 0.4 mm |
Key Features
- Ultra-low-power with FlexPowerControl
- Arm® 32-bit Cortex®-M4 CPU with FPU, Adaptive real-time accelerator (ART Accelerator™)
- High-speed memories: up to 512 KB Flash, 160 KB SRAM
- Quad SPI Flash memories interface
- Rich analog peripherals: 12-bit ADC, 12-bit DAC, operational amplifier, ultra-low-power comparators
- Extensive range of communication interfaces: I2C, SPI, USART, UART, LPUART, SAI, SDMMC, CAN
- Up to 21 capacitive sensing channels
- Multiple power-saving modes: VBAT mode, Shutdown mode, Standby mode, Stop 2 mode
- RTC with HW calendar, alarms, and calibration
- True random number generator, CRC calculation unit, 96-bit unique ID
Applications
The STM32L451REY6TR is suitable for a wide range of low-power applications, including:
- Industrial automation and control systems
- Medical devices requiring low power consumption
- Consumer electronics such as smart home devices and wearables
- Automotive systems, especially those requiring high reliability and low power
- IoT devices and sensor networks
Q & A
- What is the core architecture of the STM32L451REY6TR?
The STM32L451REY6TR is based on the Arm® 32-bit Cortex®-M4 CPU with a Floating Point Unit (FPU).
- What is the power supply range of the STM32L451REY6TR?
The power supply range is from 1.71 V to 3.6 V.
- What are the operating temperature ranges for the STM32L451REY6TR?
The operating temperature ranges are -40 °C to 85/125 °C.
- What types of memory does the STM32L451REY6TR have?
The device has up to 512 KB of Flash memory and 160 KB of SRAM.
- What are the key power-saving modes of the STM32L451REY6TR?
The key power-saving modes include VBAT mode, Shutdown mode, Standby mode, and Stop 2 mode.
- What communication interfaces are available on the STM32L451REY6TR?
The device includes I2C, SPI, USART, UART, LPUART, SAI, SDMMC, and CAN interfaces.
- Does the STM32L451REY6TR support capacitive sensing?
Yes, it supports up to 21 capacitive sensing channels.
- What is the package type of the STM32L451REY6TR?
The package type is WLCSP 64 3.4x3.7x0.6 P 0.4 mm.
- Does the STM32L451REY6TR have a real-time clock (RTC)?
Yes, it includes an RTC with HW calendar, alarms, and calibration.
- What are some typical applications for the STM32L451REY6TR?
Typical applications include industrial automation, medical devices, consumer electronics, automotive systems, and IoT devices.
