STM32L471RET6 - ARM Cortex-M4F 80MHz MCU | STMicroelectronics
MPN: STM32L471RET6 ✓ Hoạt độngSTM32L471RET6 Tóm tắt
What is a microcontroller? A microcontroller (MCU) is a compact integrated circuit designed to govern a specific operation in an embedded system. It contains a processor core, memory (flash and SRAM), and programmable input/output peripherals on a single chip. Microcontrollers are the brains of countless electronic devices, from automotive engine control units to wearable health monitors. In the system hierarchy, a microcontroller is a type of embedded processor, which falls under the broader category of integrated circuits (ICs) and semiconductors. The STM32L471RET6 is a mid-range MCU in the STM32L4 family, positioned between the lower-power STM32L0/L1 series and the higher-performance STM32F4 series, offering a balance of energy efficiency and processing capability.
Key features of the STM32L471RET6 include its ultra-low-power modes (Sleep, Low-power run, Low-power sleep, Stop 0/1/2, Standby, and Shutdown) with current consumption as low as 100 nA in Shutdown mode. The device supports a wide supply voltage range of 1.71V to 3.6V, making it suitable for battery-powered applications. It also features a 12-bit ADC with hardware oversampling, a 12-bit DAC, and a true random number generator (TRNG). The FPU accelerates mathematical computations, which is beneficial for signal processing and control algorithms. The MCU is manufactured using ST's 90 nm process technology, enabling low dynamic power consumption.
Technical depth: The STM32L471RET6 is built around the ARM Cortex-M4F core with DSP instructions and a single-precision FPU. It includes a memory protection unit (MPU) for enhanced security and reliability. The device supports up to 8x32-bit timers, including a low-power timer (LPTIM) that can operate in Stop mode. Communication peripherals include 3x USART, 3x SPI, 3x I2C, 1x CAN, 1x USB OTG FS, and 1x SAI (serial audio interface). The ADC has a resolution of 12 bits with up to 16 external channels and can operate at up to 5 Msps. The DAC has two channels with 12-bit resolution. The device also includes a flexible memory controller (FMC) for external memory expansion, supporting SRAM, PSRAM, NOR, and NAND flash.
Typical applications include industrial sensors and actuators, smart meters, medical devices (e.g., glucose monitors, infusion pumps), wearable fitness trackers, IoT nodes, and portable instrumentation. The ultra-low-power modes and rich analog peripherals make it ideal for battery-operated devices that require long battery life and precise analog measurements. For example, in a smart meter, the STM32L471RET6 can handle metrology calculations, communication protocols, and display control while consuming minimal power in sleep mode between measurements.
Design consideration: When designing with the STM32L471RET6, pay attention to the power supply decoupling. Place a 100 nF ceramic capacitor close to each VDD pin and a 4.7 uF capacitor at the main power input. For the VDDA pin, use a dedicated 1 uF capacitor to ensure stable analog performance. Also, configure the clock system carefully: the device can run from an internal 16 MHz HSI oscillator, but for precise timing, use an external 8 MHz crystal with appropriate load capacitors. The boot pins (BOOT0 and BOOT1) must be set correctly for the desired boot mode (flash, system memory, or SRAM).
Bộ thay thế dễ dàng lắp đặt cho STM32L471RET6 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với STM32L471RET6 (cùng hình factor và footprint) — khác nhau ở ADC Resolution, DAC Resolution, Flash Memory, Package.
STM32L471RGT6
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
STM32L476RGT6
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →STM32L475RGT6
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
STM32L471RET6TR
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
GD32F450RET6
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
STM32L471RET6 Tỷ lệ tối đa & tính chất điện
| Core | ARM Cortex-M4F with FPU |
| Tần số xung maksimum | 80 MHz |
| Flash Memory | 512 KB |
| SRAM | 128 KB |
| Supply Voltage Range | 1.71 V to 3.6 V |
| Hộp | LQFP-64 (10x10 mm, 0.5 mm pitch) |
| Kiểu lắp đặt | Surface Mount |
| ADC Resolution | 12-bit |
| ADC Channels | 16 external channels |
| DAC Resolution | 12-bit |
| DAC Channels | 2 |
| Communication Interfaces | 3x USART, 3x SPI, 3x I2C, 1x CAN, 1x USB OTG FS, 1x SAI |
| Timers | 8x 32-bit timers, 1x low-power timer |
| Khoảng nhiệt độ hoạt động | -40C to +85C |
| Trạng thái RoHS | Compliant |
Cấu hình chân STM32L471RET6
| Chân 1 | VBAT — Battery backup supply for RTC and backup registers |
| Chân 2 | PC14 — GPIO or OSC32_IN |
| Chân 3 | PC15 — GPIO or OSC32_OUT |
| Chân 4 | PF0 — GPIO or OSC_IN |
| Chân 5 | PF1 — GPIO or OSC_OUT |
| Chân 6 | NRST — Reset (active low) |
| Chân 7 | PC0 — GPIO or ADC input |
| Chân 8 | PC1 — GPIO or ADC input |
| Chân 9 | PC2 — GPIO or ADC input |
| Chân 10 | PC3 — GPIO or ADC input |
| Chân 11 | VDD — Digital power supply |
| Chân 12 | VSS — Ground |
| Chân 13 | PA0 — GPIO or ADC input |
| Chân 14 | PA1 — GPIO or ADC input |
| Chân 15 | PA2 — GPIO or USART2_TX |
| Chân 16 | PA3 — GPIO or USART2_RX |
| Chân 17 | PA4 — GPIO or DAC_OUT1 |
| Chân 18 | PA5 — GPIO or DAC_OUT2 |
| Chân 19 | PA6 — GPIO or SPI1_MISO |
| Chân 20 | PA7 — GPIO or SPI1_MOSI |
| Chân 21 | PC4 — GPIO or ADC input |
| Chân 22 | PC5 — GPIO or ADC input |
| Chân 23 | PB0 — GPIO or ADC input |
| Chân 24 | PB1 — GPIO or ADC input |
| Chân 25 | PB2 — GPIO or BOOT1 |
| Chân 26 | PB10 — GPIO or I2C2_SCL |
| Chân 27 | PB11 — GPIO or I2C2_SDA |
| Chân 28 | VDD — Digital power supply |
| Chân 29 | VSS — Ground |
| Chân 30 | PB12 — GPIO or SPI2_NSS |
| Chân 31 | PB13 — GPIO or SPI2_SCK |
| Chân 32 | PB14 — GPIO or SPI2_MISO |
| Chân 33 | PB15 — GPIO or SPI2_MOSI |
| Chân 34 | PC6 — GPIO or USART6_TX |
| Chân 35 | PC7 — GPIO or USART6_RX |
| Chân 36 | PC8 — GPIO or USART3_TX |
| Chân 37 | PC9 — GPIO or USART3_RX |
| Chân 38 | PA8 — GPIO or USB_OTG_FS_SOF |
| Chân 39 | PA9 — GPIO or USB_OTG_FS_VBUS |
| Chân 40 | PA10 — GPIO or USB_OTG_FS_ID |
| Chân 41 | PA11 — GPIO or USB_OTG_FS_DM |
| Chân 42 | PA12 — GPIO or USB_OTG_FS_DP |
| Chân 43 | PA13 — GPIO or SWDIO |
| Chân 44 | PA14 — GPIO or SWCLK |
| Chân 45 | PA15 — GPIO or JTDI |
| Chân 46 | PC10 — GPIO or USART4_TX |
| Chân 47 | PC11 — GPIO or USART4_RX |
| Chân 48 | PC12 — GPIO or USART5_TX |
| Chân 49 | PD2 — GPIO or USART5_RX |
| Chân 50 | PB3 — GPIO or SPI1_SCK |
| Chân 51 | PB4 — GPIO or SPI1_NSS |
| Chân 52 | PB5 — GPIO or I2C1_SMBA |
| Chân 53 | PB6 — GPIO or I2C1_SCL |
| Chân 54 | PB7 — GPIO or I2C1_SDA |
| Chân 55 | BOOT0 — Boot mode selection |
| Chân 56 | PB8 — GPIO or CAN_RX |
| Chân 57 | PB9 — GPIO or CAN_TX |
| Chân 58 | VDD — Digital power supply |
| Chân 59 | VSS — Ground |
| Chân 60 | PC13 — GPIO or RTC_TAMP1 |
| Chân 61 | PC14 — GPIO or OSC32_IN |
| Chân 62 | PC15 — GPIO or OSC32_OUT |
| Chân 63 | VDDA — Analog power supply |
| Chân 64 | VSSA — Analog ground |
Ứng dụng tiêu biểu
STM32L471RET6 phù hợp cho 6 Áp dụngs: Industrial Sensors and Actuators, Smart Meters, Medical Devices, Wearable Fitness Trackers, IoT Nodes, Portable Instrumentation.
Industrial Sensors and Actuators
The STM32L471RET6 is ideal for industrial sensors and actuators due to its ultra-low-power modes and rich analog peripherals. Its 12-bit ADC with hardware oversampling enables precise sensor readings, while the multiple communication interfaces (USART, SPI, I2C, CAN) allow seamless integration with industrial networks. The wide supply voltage range (1.71V to 3.6V) accommodates various power sources, and the low-power modes extend battery life in remote monitoring systems. In a typical industrial sensor node, the MCU reads analog sensor data, processes it with the FPU, and transmits results over CAN or RS-485, all while consuming minimal power in sleep mode between measurements.
Được đề xuất
Smart Meters
The STM32L471RET6 is well-suited for smart meters, handling metrology calculations, communication protocols, and display control. Its 12-bit ADC with up to 16 channels can sample voltage and current waveforms for energy measurement, while the FPU accelerates the required mathematical computations. The ultra-low-power modes allow the meter to operate on battery power for extended periods, with current consumption as low as 100 nA in Shutdown mode. The device's communication interfaces (USART, SPI, I2C) enable connectivity with PLC modems, RF modules, or wired networks for data reporting. In a typical smart meter, the MCU periodically wakes up, performs measurements, updates the display, and communicates data, then returns to low-power sleep to conserve energy.
Được đề xuất
Medical Devices
The STM32L471RET6 is suitable for medical devices such as glucose monitors and infusion pumps, where low power consumption and precise analog measurements are critical. Its 12-bit ADC with hardware oversampling provides accurate sensor readings, while the FPU supports complex signal processing algorithms. The device's low-power modes enable long battery life, essential for portable medical devices. The multiple communication interfaces allow data transfer to external displays or wireless modules. In a glucose monitor, the MCU reads the sensor signal, processes it to calculate glucose levels, and displays the result, all while consuming minimal power to extend battery life between charges.
Được đề xuất
Wearable Fitness Trackers
The STM32L471RET6 is ideal for wearable fitness trackers due to its ultra-low-power operation and small LQFP-64 package. The device can run on a coin cell battery for months, thanks to its low-power modes and efficient 90 nm process technology. Its 12-bit ADC can interface with accelerometers and heart-rate sensors, while the FPU processes the data for activity tracking. The communication interfaces (I2C, SPI) connect to sensors and displays. In a typical fitness tracker, the MCU continuously samples motion data, processes it to detect steps or activity, and communicates with a smartphone via Bluetooth, all while minimizing power consumption to extend battery life.
Được đề xuất
IoT Nodes
The STM32L471RET6 is a strong choice for IoT nodes, offering a balance of performance and energy efficiency. Its ultra-low-power modes allow battery-powered operation for years, while the FPU and DSP instructions handle sensor data processing. The device supports multiple communication interfaces (USART, SPI, I2C, USB) for connecting to various wireless modules (LoRa, BLE, Wi-Fi). In a typical IoT node, the MCU wakes up periodically, reads sensors, processes data, and transmits it over a wireless link, then returns to sleep. The wide supply voltage range (1.71V to 3.6V) accommodates different battery configurations, and the rich analog peripherals enable direct sensor interfacing.
Được đề xuất
Portable Instrumentation
The STM32L471RET6 is well-suited for portable instrumentation, such as handheld multimeters and data loggers, due to its low power consumption and high-resolution ADC. The 12-bit ADC with hardware oversampling provides accurate measurements, while the FPU supports complex calculations. The device's low-power modes extend battery life, and the multiple communication interfaces allow data transfer to a PC or smartphone. In a portable data logger, the MCU samples analog signals, stores data in flash memory, and communicates via USB, all while operating from a battery. The wide supply voltage range ensures compatibility with various battery chemistries.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho STM32L471RET6 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | STM32L471RGT6 | STM32L476RGT6 | STM32L475RGT6 | GD32F450RET6 |
|---|---|---|---|---|---|
| Package | LQFP-64 | LQFP-64 | LQFP-64 | LQFP-64 | LQFP-64 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | GigaDevice |
| Core | ARM Cortex-M4F | ARM Cortex-M4F | ARM Cortex-M4F | ARM Cortex-M4F | ARM Cortex-M4F |
| Max Clock Frequency | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 200 MHz |
| Flash Memory | 512 KB | 1 MB | 1 MB | 1 MB | 512 KB |
| SRAM | 128 KB | 128 KB | 128 KB | 128 KB | 192 KB |
| Supply Voltage Range | 1.71V to 3.6V | 1.71V to 3.6V | 1.71V to 3.6V | 1.71V to 3.6V | 2.6V to 3.6V |
| ADC Resolution | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit |
Bảo phân biệt quan trọng
- Ultra-low-power modes with 100 nA shutdown current (vsGD32F450RET6)
- Wide supply voltage range (1.71V to 3.6V) (vsGD32F450RET6)
- Rich analog peripherals (12-bit ADC, 12-bit DAC, comparators, op-amps) (vsSTM32L475RGT6)
Ghi chú thiết kế
Ensure proper power supply decoupling: place a 100 nF ceramic capacitor close to each VDD pin and a 4.7 uF capacitor at the main power input. For the VDDA pin, use a dedicated 1 uF capacitor to ensure stable analog performance. This reduces noise and improves ADC accuracy.
For the LQFP-64 package, ensure adequate ground plane and thermal vias under the exposed pad (if present) to improve heat dissipation. Keep high-speed signal traces short and avoid routing them near the crystal oscillator pins to minimize EMI.
Configure the clock system carefully: the device can run from an internal 16 MHz HSI oscillator, but for precise timing, use an external 8 MHz crystal with appropriate load capacitors. Also, set the boot pins (BOOT0 and BOOT1) correctly for the desired boot mode (flash, system memory, or SRAM) to avoid unexpected startup behavior.
Thông tin tuân thủ
RoHS compliant per STMicroelectronics product page. Not AEC-Q100 qualified; for automotive, consider STM32L4 series with AEC-Q100 qualification.
