Overview
The STM32L471RET3 is a ultra-low-power microcontroller from STMicroelectronics, based on the 32-bit Arm® Cortex®-M4 CPU with a floating-point unit (FPU). This MCU is designed to offer high performance and low power consumption, making it suitable for a wide range of applications that require energy efficiency and robust functionality.
It operates within a voltage range of 1.71 V to 3.6 V and can function across a temperature range of -40 °C to 85/105/125 °C. The device features advanced power-saving modes, including VBAT mode, Shutdown mode, Standby mode, and Stop 2 mode, which enable very low current consumption.
The STM32L471RET3 is part of the STM32L4 series, known for its ultra-low-power capabilities and comprehensive set of peripherals, making it an ideal choice for applications such as IoT devices, industrial control systems, and medical devices.
Key Specifications
| Specification | Details |
|---|---|
| Core | Arm® 32-bit Cortex®-M4 CPU with FPU, up to 80 MHz |
| Power Supply | 1.71 V to 3.6 V |
| Temperature Range | -40 °C to 85/105/125 °C |
| Power Modes | 300 nA in VBAT mode, 30 nA Shutdown mode, 120 nA Standby mode, 420 nA Standby mode with RTC, 1.1 µA Stop 2 mode, 1.4 µA with RTC |
| Flash Memory | Up to 1 MB, 2 banks read-while-write, proprietary code readout protection |
| SRAM | Up to 128 KB, including 32 KB with hardware parity check |
| Timers | 16x timers: 2x 16-bit advanced motor-control, 2x 32-bit and 5x 16-bit general purpose, 2x 16-bit basic, 2x low-power 16-bit timers |
| Analog Peripherals | 3x 12-bit ADC 5 Msps, 2x 12-bit DAC output channels, 2x operational amplifiers with built-in PGA, 2x ultra-low-power comparators |
| Communication Interfaces | 2x SAIs, 3x I2C FM+, 5x USARTs, 1x LPUART, 3x SPIs, CAN (2.0B Active), SDMMC interface |
| Package | LQFP 64 10x10x1.4 mm |
Key Features
- Ultra-low-power with FlexPowerControl, including multiple power-saving modes.
- Arm® 32-bit Cortex®-M4 CPU with FPU, Adaptive real-time accelerator (ART Accelerator™) allowing 0-wait-state execution from Flash memory.
- High performance with up to 100 DMIPS and DSP instructions.
- Rich set of peripherals including RTC with HW calendar, alarms, and calibration, up to 24 capacitive sensing channels, and multiple timers.
- Advanced analog peripherals such as 3x 12-bit ADCs, 2x 12-bit DACs, 2x operational amplifiers, and 2x ultra-low-power comparators.
- Comprehensive communication interfaces including SAIs, I2C, USARTs, LPUART, SPIs, CAN, and SDMMC.
- 14-channel DMA controller, true random number generator, and CRC calculation unit.
- Development support with serial wire debug (SWD), JTAG, and Embedded Trace Macrocell™.
- All packages are ECOPACK2® compliant.
Applications
The STM32L471RET3 is versatile and can be used in a variety of applications, including:
- Internet of Things (IoT) devices: Due to its ultra-low-power consumption, it is ideal for battery-powered IoT devices.
- Industrial Control Systems: The device's robust set of peripherals and low power consumption make it suitable for industrial automation and control systems.
- Medical Devices: Its high performance and low power features are beneficial for medical devices that require precise and energy-efficient operation.
- Consumer Electronics: It can be used in various consumer electronics such as smart home devices, wearables, and other portable electronics.
- Automotive Systems: The device's ability to operate over a wide temperature range and its comprehensive set of peripherals make it suitable for automotive applications.
Q & A
- What is the core architecture of the STM32L471RET3?
The STM32L471RET3 is based on the Arm® 32-bit Cortex®-M4 CPU with a floating-point unit (FPU).
- What is the power supply range for the STM32L471RET3?
The device operates within a voltage range of 1.71 V to 3.6 V.
- What are the different power-saving modes available on the STM32L471RET3?
The device features VBAT mode, Shutdown mode, Standby mode, and Stop 2 mode, among others.
- How much flash memory does the STM32L471RET3 have?
The device has up to 1 MB of flash memory with 2 banks read-while-write and proprietary code readout protection.
- What types of timers are available on the STM32L471RET3?
The device includes 16x timers: 2x 16-bit advanced motor-control, 2x 32-bit and 5x 16-bit general purpose, 2x 16-bit basic, and 2x low-power 16-bit timers.
- What are the key analog peripherals of the STM32L471RET3?
The device features 3x 12-bit ADCs, 2x 12-bit DACs, 2x operational amplifiers with built-in PGA, and 2x ultra-low-power comparators.
- What communication interfaces are available on the STM32L471RET3?
The device includes 2x SAIs, 3x I2C FM+, 5x USARTs, 1x LPUART, 3x SPIs, CAN (2.0B Active), and SDMMC interface.
- What is the package type for the STM32L471RET3?
The device is available in an LQFP 64 10x10x1.4 mm package.
- Is the STM32L471RET3 environmentally friendly?
Yes, all packages are ECOPACK2® compliant.
- What development tools are supported by the STM32L471RET3?
The device supports serial wire debug (SWD), JTAG, and Embedded Trace Macrocell™.
