Overview
The STM32L471QEI6 is an ultra-low-power microcontroller from STMicroelectronics, based on the high-performance Arm® Cortex®-M4 32-bit RISC core. This device 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 STM32L471QEI6 is part of the STM32L471 series, which is known for its ultra-low-power consumption and advanced peripherals, making it suitable for a wide range of applications requiring low power and high performance.
Key Specifications
| Specification | Details |
|---|---|
| Core | Arm® 32-bit Cortex®-M4 CPU with FPU |
| Frequency | Up to 80 MHz |
| Program Memory | 512 kB Flash |
| Data Memory | Up to 128 KB SRAM (including 32 KB with hardware parity check) |
| Power Supply | 1.71 V to 3.6 V |
| Temperature Range | -40 °C to 85/105/125 °C |
| ADC Resolution | 3 x 12-bit ADCs (5 Msps) |
| DAC Channels | 2 x 12-bit DAC output channels |
| Timers | 2 x 32-bit, 9 x 16-bit general-purpose timers, 2 x 16-bit low-power timers |
| Communication Interfaces | USB OTG 2.0 full-speed, 3 x I2C, 3 x SPI, 3 x USART, 2 x UART, 1 x LPUART, 1 x CAN, 1 x SDMMC |
| Package | 132-pin UFBGA |
Key Features
- Ultra-low-power with FlexPowerControl, including multiple power-saving modes (Shutdown, Standby, Stop 2 mode with RTC)
- Adaptive real-time accelerator (ART Accelerator™) allowing 0-wait-state execution from flash memory
- Memory protection unit (MPU) and proprietary code readout protection
- Rich analog peripherals: 3 x 12-bit ADCs, 2 x 12-bit DACs, 2 x operational amplifiers, 2 x ultra-low-power comparators
- Integrated LCD driver 8x40 or 4x44 with internal step-up converter
- Up to 24 capacitive sensing channels for touchkey, linear, and rotary touch sensors
- Advanced communication interfaces: USB OTG 2.0 full-speed, multiple I2C, SPI, USART, UART, CAN, and SDMMC
- Independent power supplies for analog and digital components
- True random number generator, CRC calculation unit, and 96-bit unique ID
Applications
The STM32L471QEI6 is suitable for various applications that require low power consumption and high performance, such as:
- Personal electronics and wearables
- Industrial automation and control systems
- Medical devices and healthcare equipment
- Smart home and IoT devices
- Automotive systems and telematics
Q & A
- What is the core architecture of the STM32L471QEI6?
The STM32L471QEI6 is based on the Arm® 32-bit Cortex®-M4 CPU with a Floating Point Unit (FPU).
- What is the maximum operating frequency of the STM32L471QEI6?
The maximum operating frequency is up to 80 MHz.
- What is the power supply range for the STM32L471QEI6?
The power supply range is from 1.71 V to 3.6 V.
- What are the key power-saving modes available in the STM32L471QEI6?
The device features Shutdown, Standby, and Stop 2 modes with RTC, among others.
- What types of communication interfaces are available on the STM32L471QEI6?
The device includes USB OTG 2.0 full-speed, multiple I2C, SPI, USART, UART, CAN, and SDMMC interfaces.
- Does the STM32L471QEI6 support capacitive sensing?
Yes, it supports up to 24 capacitive sensing channels.
- What is the package type for the STM32L471QEI6?
The device is available in a 132-pin UFBGA package.
- What are the key analog peripherals included in the STM32L471QEI6?
The device includes 3 x 12-bit ADCs, 2 x 12-bit DACs, 2 x operational amplifiers, and 2 x ultra-low-power comparators.
- Does the STM32L471QEI6 have any memory protection features?
Yes, it includes a memory protection unit (MPU) and proprietary code readout protection.
- What are some typical applications for the STM32L471QEI6?
Typical applications include personal electronics, industrial automation, medical devices, smart home devices, and automotive systems.
