Overview
The STM32L451RET6TR is an ultra-low-power microcontroller from STMicroelectronics, part of the STM32L451xx family. It is based on the high-performance Arm® Cortex®-M4 32-bit RISC core, operating at a frequency of up to 80 MHz. This microcontroller features a Floating Point Unit (FPU) single precision, supporting 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, offering various power-saving modes and a wide range of peripherals and interfaces. It is suitable for applications requiring high performance, low power consumption, and advanced analog and digital capabilities.
Key Specifications
| Parameter | Specification |
|---|---|
| Core | Arm® 32-bit Cortex®-M4 CPU with FPU |
| Maximum Clock Frequency | Up to 80 MHz |
| Flash Memory | Up to 512 KB single bank Flash |
| SRAM | 160 KB of SRAM (including 32 KB with hardware parity check) |
| ADC Resolution | 12-bit, up to 16-bit with hardware oversampling |
| DAC Channels | 1x 12-bit DAC output channels |
| Operational Amplifier | 1x operational amplifier with built-in PGA |
| Comparators | 2x ultra-low-power comparators |
| Timers | 1x 32-bit, 5x 16-bit general purpose, 2x 16-bit basic, 2x low-power 16-bit timers |
| Communication Interfaces | 4x I2C, 3x SPI, 3x USART, 1x UART, 1x LPUART, 1x SAI, 1x SDMMC, 1x CAN (2.0B Active) |
| Power Supply | 1.71 V to 3.6 V |
| Temperature Range | -40 °C to 85/125 °C |
| Package | LQFP 64 (10x10x1.4 mm) |
| I/Os | Up to 52 high-current I/Os |
Key Features
- Ultra-low-power with FlexPowerControl, featuring various power-saving modes such as Shutdown, Standby, and Stop modes.
- Arm® 32-bit Cortex®-M4 CPU with FPU, Adaptive real-time accelerator (ART Accelerator™), and DSP instructions.
- High-speed memories: up to 512 KB Flash, 160 KB SRAM, and Quad SPI Flash memory interface.
- Rich analog peripherals: 12-bit ADC, 12-bit DAC, operational amplifier, and ultra-low-power comparators.
- Extensive range of communication interfaces: I2C, SPI, USART, UART, LPUART, SAI, SDMMC, and CAN.
- Low-power RTC with HW calendar, alarms, and calibration.
- Up to 21 capacitive sensing channels supporting touchkey, linear, and rotary touch sensors.
- 14-channel DMA controller, true random number generator, and CRC calculation unit.
- Development support: serial wire debug (SWD), JTAG, Embedded Trace Macrocell™.
Applications
The STM32L451RET6TR is suitable for a wide range of applications that require high performance, low power consumption, and advanced analog and digital capabilities. These include:
- Industrial automation and control systems.
- Medical devices requiring low power and high precision.
- Consumer electronics such as smart home devices and wearables.
- Automotive systems, especially those requiring low power and robust communication interfaces.
- IoT devices that need efficient power management and multiple communication protocols.
Q & A
- What is the core architecture of the STM32L451RET6TR?
The STM32L451RET6TR is based on the Arm® 32-bit Cortex®-M4 CPU with a Floating Point Unit (FPU).
- What is the maximum clock frequency of the STM32L451RET6TR?
The maximum clock frequency is up to 80 MHz.
- What are the power-saving modes available in the STM32L451RET6TR?
The device features various power-saving modes including Shutdown, Standby, and Stop modes.
- What is the temperature range for the STM32L451RET6TR?
The temperature range is -40 °C to 85/125 °C.
- What types of communication interfaces are available on the STM32L451RET6TR?
The device includes I2C, SPI, USART, UART, LPUART, SAI, SDMMC, and CAN (2.0B Active) interfaces.
- How much Flash and SRAM memory does the STM32L451RET6TR have?
The device has up to 512 KB of Flash memory and 160 KB of SRAM.
- What is the resolution of the ADC on the STM32L451RET6TR?
The ADC resolution is 12-bit, with the option for up to 16-bit with hardware oversampling.
- Does the STM32L451RET6TR support capacitive sensing?
Yes, it supports up to 21 capacitive sensing channels.
- What are the power supply requirements for the STM32L451RET6TR?
The power supply range is from 1.71 V to 3.6 V.
- What package options are available for the STM32L451RET6TR?
The device is available in LQFP 64 (10x10x1.4 mm) package.
