Overview
The STM32L462RET6 is an ultra-low-power microcontroller from STMicroelectronics, part of the STM32L4 series. It is based on the high-performance Arm® Cortex®-M4 32-bit RISC core, operating at a frequency of up to 80 MHz. The Cortex-M4 core includes a Floating Point Unit (FPU) that supports all Arm® single-precision data-processing instructions and data types, as well as a full set of DSP instructions and a memory protection unit (MPU) for enhanced application security.
This microcontroller is designed for low-power applications, featuring a comprehensive set of power-saving modes and a wide range of peripherals and interfaces. It is suitable for various applications requiring high performance and low energy consumption.
Key Specifications
| Parameter | Specification |
|---|---|
| Core Processor | Arm® Cortex®-M4 32-bit RISC core |
| Core Frequency | Up to 80 MHz |
| Program Memory | 512 KB Flash |
| SRAM | 160 KB (including 32 KB with hardware parity check) |
| Power Supply | 1.71 V to 3.6 V |
| Operating Temperature | -40 °C to 85 °C / -40 °C to 125 °C |
| Package | 64-LQFP (10x10 mm) |
| Number of I/Os | Up to 83 fast I/Os, most 5 V-tolerant |
| Interfaces | CAN, I2C, SPI, UART, USART, USB FS, SDMMC, SAI |
| ADC | 12-bit, 5 Msps |
| DAC | 1 channel, 12-bit |
| Timers | 1x 32-bit, 5x 16-bit, 2x low-power 16-bit timers |
| Capacitive Sensing Channels | Up to 21 channels |
Key Features
- Ultra-low-power with FlexPowerControl, consuming down to 24 uA/MHz in run mode
- Batch acquisition mode (BAM) and fast 4 µs wakeup from Stop mode
- Brown out reset (BOR) and low-power RTC with HW calendar, alarms, and calibration
- Internal 16 MHz factory-trimmed RC (±1%) and internal low-power 32 kHz RC (±5%)
- Quad SPI Flash memories interface and AES hardware accelerator
- True random number generator, CRC calculation unit, and 96-bit unique ID
- Serial wire debug (SWD), JTAG, and Embedded Trace Macrocell™ support
- Readout protection, write protection, proprietary code readout protection, and Firewall
- Up to 21 capacitive sensing channels supporting touchkey, linear, and rotary touch sensors
Applications
The STM32L462RET6 is versatile and can be used in a variety of applications, including:
- IoT devices requiring low power consumption and high performance
- Industrial automation and control systems
- Medical devices needing precise and efficient processing
- Consumer electronics such as smart home devices and wearables
- Automotive systems, especially those requiring advanced security features like AES encryption
Q & A
- What is the core processor of the STM32L462RET6?
The core processor is the Arm® Cortex®-M4 32-bit RISC core.
- What is the maximum operating frequency of the STM32L462RET6?
The maximum operating frequency is up to 80 MHz.
- What is the power supply range for the STM32L462RET6?
The power supply range is from 1.71 V to 3.6 V.
- What are the operating temperature ranges for the STM32L462RET6?
The operating temperature ranges are -40 °C to 85 °C and -40 °C to 125 °C.
- What types of interfaces does the STM32L462RET6 support?
The STM32L462RET6 supports CAN, I2C, SPI, UART, USART, USB FS, SDMMC, and SAI interfaces.
- Does the STM32L462RET6 have any security features?
Yes, it includes an AES hardware accelerator, readout protection, write protection, proprietary code readout protection, and Firewall.
- What is the package type of the STM32L462RET6?
The package type is 64-LQFP (10x10 mm).
- How many I/Os does the STM32L462RET6 have?
The STM32L462RET6 has up to 83 fast I/Os, most of which are 5 V-tolerant.
- What is the resolution of the ADC in the STM32L462RET6?
The ADC resolution is 12-bit with a sampling rate of 5 Msps.
- Does the STM32L462RET6 support capacitive sensing?
Yes, it supports up to 21 capacitive sensing channels.
