Overview
The STM32L451REI6 is an ultra-low-power microcontroller from STMicroelectronics, based on the high-performance Arm® Cortex®-M4 32-bit RISC core. This microcontroller 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) to enhance application security.
The device is part of the STM32L451xx family, which is designed for low-power applications, offering a wide range of power-saving modes and independent power supplies for analog components.
Key Specifications
| Parameter | Specification |
|---|---|
| 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 |
| Temperature Range | -40 °C to 85/125 °C |
| Package | 64-pin UFBGA, LQFP, WLCSP |
| ADC | 12-bit, 5 Msps, up to 16-bit with hardware oversampling |
| DAC | 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 CAN, 1x SDMMC |
| Capacitive Sensing Channels | Up to 21 channels |
| Power Modes | VBAT mode, Shutdown mode, Standby mode, Stop 2 mode |
Key Features
- Ultra-low-power with FlexPowerControl
- Arm® 32-bit Cortex®-M4 CPU with FPU, Adaptive real-time accelerator (ART Accelerator™)
- Up to 512 KB Flash memory and 160 KB SRAM
- Quad SPI Flash memories interface
- Extensive range of enhanced I/Os and peripherals
- Fast 12-bit ADC (5 Msps), 12-bit DAC output channel, operational amplifier, and comparators
- Low-power RTC, general-purpose timers, and motor control timers
- Up to 21 capacitive sensing channels
- Standard and advanced communication interfaces (I2C, SPI, USART, UART, CAN, SDMMC)
- Comprehensive set of power-saving modes (VBAT mode, Shutdown mode, Standby mode, Stop 2 mode)
- Independent power supplies for analog components
Applications
The STM32L451REI6 is suitable for a wide range of low-power applications, including:
- Industrial automation and control systems
- Medical devices requiring low power consumption
- Consumer electronics with power efficiency requirements
- IoT devices and smart home applications
- Automotive systems needing robust and low-power microcontrollers
Q & A
- What is the core architecture of the STM32L451REI6?
The STM32L451REI6 is based on the Arm® 32-bit Cortex®-M4 CPU with a Floating Point Unit (FPU).
- What is the operating frequency of the STM32L451REI6?
The microcontroller operates at a frequency of up to 80 MHz.
- What are the power supply and temperature ranges for the STM32L451REI6?
The device operates from a 1.71 V to 3.6 V power supply and in a temperature range of -40 °C to 85/125 °C.
- What types of memory does the STM32L451REI6 have?
The device features up to 512 KB Flash memory and 160 KB SRAM.
- What are the key analog peripherals of the STM32L451REI6?
The device includes a 12-bit ADC, a 12-bit DAC, an operational amplifier, and two ultra-low-power comparators.
- What communication interfaces are available on the STM32L451REI6?
The device features four I2C interfaces, three SPI interfaces, three USART interfaces, one UART, one LPUART, one CAN interface, and one SDMMC interface.
- How many capacitive sensing channels does the STM32L451REI6 support?
The device supports up to 21 capacitive sensing channels.
- What are the power-saving modes available on the STM32L451REI6?
The device offers VBAT mode, Shutdown mode, Standby mode, and Stop 2 mode.
- Is the STM32L451REI6 suitable for industrial applications?
Yes, the device is suitable for industrial automation and control systems due to its robust and low-power design.
- What is the package type for the STM32L451REI6?
The device is available in 64-pin UFBGA, LQFP, and WLCSP packages.
