Overview
The STM32L452RET3 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) to enhance application security.
The device is part of the STM32L452xx family, known for its low power consumption and extensive range of peripherals and interfaces. It is suitable for a wide range of applications requiring high performance and low energy usage.
Key Specifications
| Parameter | Value |
|---|---|
| Core | Arm® 32-bit Cortex®-M4 CPU with FPU |
| Operating Frequency | Up to 80 MHz |
| Flash Memory | Up to 512 KB |
| SRAM | 160 KB |
| Supply Voltage | 1.71 V to 3.6 V |
| Operating Temperature | -40 °C to 85/125 °C |
| Package | LQFP-64 |
| Number of Pins | 64 |
| Interfaces | CAN, I2C, SPI, UART, USART, USB |
| ADC Channels | 1 x 12-bit ADC (5 Msps) |
| DAC Channels | 1 x 12-bit DAC output channel |
| Timers | 1 x 32-bit, 5 x 16-bit general purpose, 2 x 16-bit low-power timers |
| Capacitive Sensing Channels | Up to 21 channels |
Key Features
- Ultra-low-power with FlexPowerControl
- Batch acquisition mode (BAM) and 4 µs wakeup from Stop mode
- Brown out reset (BOR) and interconnect matrix
- Rich analog peripherals including 12-bit ADC, 12-bit DAC, operational amplifier, and ultra-low-power comparators
- Extensive communication interfaces: USB 2.0 full-speed, SAI, I2C, SPI, USART, UART, CAN, and SDMMC
- Low power modes: VBAT mode, Shutdown mode, Standby mode, and Stop 2 mode
- Support for touchkey, linear, and rotary touch sensors with up to 21 capacitive sensing channels
- True random number generator, CRC calculation unit, and 96-bit unique ID
- Development support: serial wire debug (SWD), JTAG, Embedded Trace Macrocell™
Applications
The STM32L452RET3 is versatile and can be used in a variety of applications that require low power consumption and high performance. Some typical applications include:
- Industrial automation and control systems
- Medical devices and healthcare equipment
- Consumer electronics such as smart home devices and wearables
- Automotive systems, including infotainment and driver assistance
- Internet of Things (IoT) devices and smart sensors
Q & A
- What is the core of the STM32L452RET3 microcontroller?
The core is the Arm® 32-bit Cortex®-M4 CPU with a Floating Point Unit (FPU).
- What is the maximum operating frequency of the STM32L452RET3?
The maximum operating frequency is up to 80 MHz.
- How much Flash memory and SRAM does the STM32L452RET3 have?
The device has up to 512 KB of Flash memory and 160 KB of SRAM.
- What is the supply voltage range for the STM32L452RET3?
The supply voltage range is from 1.71 V to 3.6 V.
- What are the operating temperature ranges for the STM32L452RET3?
The operating temperature ranges are -40 °C to 85/125 °C.
- What types of communication interfaces does the STM32L452RET3 support?
The device supports CAN, I2C, SPI, UART, USART, USB, and SDMMC interfaces.
- How many ADC and DAC channels does the STM32L452RET3 have?
The device has one 12-bit ADC channel and one 12-bit DAC output channel.
- What are the low power modes available on the STM32L452RET3?
The device features VBAT mode, Shutdown mode, Standby mode, and Stop 2 mode.
- Does the STM32L452RET3 support capacitive sensing?
Yes, it supports up to 21 capacitive sensing channels.
- What development tools are available for the STM32L452RET3?
The device supports serial wire debug (SWD), JTAG, and Embedded Trace Macrocell™.
