STM32L471RET6 - ARM Cortex-M4F 80MHz MCU | STMicroelectronics
MPN: STM32L471RET6 ✓ פעילSTM32L471RET6 סקירה
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).
חלופות תחליף ישיר עבור STM32L471RET6 — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם STM32L471RET6 (אותו גורם צורה וטביעת רגל) — שונים ב ADC Resolution, DAC Resolution, Flash Memory, Package.
STM32L471RGT6
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
STM32L476RGT6
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←STM32L475RGT6
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
STM32L471RET6TR
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
GD32F450RET6
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
STM32L471RET6 דירוגים מרביים ומאפיינים חשמליים
| Core | ARM Cortex-M4F with FPU |
| תדר שעון מקסימלי | 80 MHz |
| Flash Memory | 512 KB |
| SRAM | 128 KB |
| Supply Voltage Range | 1.71 V to 3.6 V |
| מארז | LQFP-64 (10x10 mm, 0.5 mm pitch) |
| סוג הרכבה | 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 |
| טווח טמפרטורת פעולה | -40C to +85C |
| סטטוס RoHS | Compliant |
תצורת פינים של STM32L471RET6
| פין 1 | VBAT — Battery backup supply for RTC and backup registers |
| פין 2 | PC14 — GPIO or OSC32_IN |
| פין 3 | PC15 — GPIO or OSC32_OUT |
| פין 4 | PF0 — GPIO or OSC_IN |
| פין 5 | PF1 — GPIO or OSC_OUT |
| פין 6 | NRST — Reset (active low) |
| פין 7 | PC0 — GPIO or ADC input |
| פין 8 | PC1 — GPIO or ADC input |
| פין 9 | PC2 — GPIO or ADC input |
| פין 10 | PC3 — GPIO or ADC input |
| פין 11 | VDD — Digital power supply |
| פין 12 | VSS — Ground |
| פין 13 | PA0 — GPIO or ADC input |
| פין 14 | PA1 — GPIO or ADC input |
| פין 15 | PA2 — GPIO or USART2_TX |
| פין 16 | PA3 — GPIO or USART2_RX |
| פין 17 | PA4 — GPIO or DAC_OUT1 |
| פין 18 | PA5 — GPIO or DAC_OUT2 |
| פין 19 | PA6 — GPIO or SPI1_MISO |
| פין 20 | PA7 — GPIO or SPI1_MOSI |
| פין 21 | PC4 — GPIO or ADC input |
| פין 22 | PC5 — GPIO or ADC input |
| פין 23 | PB0 — GPIO or ADC input |
| פין 24 | PB1 — GPIO or ADC input |
| פין 25 | PB2 — GPIO or BOOT1 |
| פין 26 | PB10 — GPIO or I2C2_SCL |
| פין 27 | PB11 — GPIO or I2C2_SDA |
| פין 28 | VDD — Digital power supply |
| פין 29 | VSS — Ground |
| פין 30 | PB12 — GPIO or SPI2_NSS |
| פין 31 | PB13 — GPIO or SPI2_SCK |
| פין 32 | PB14 — GPIO or SPI2_MISO |
| פין 33 | PB15 — GPIO or SPI2_MOSI |
| פין 34 | PC6 — GPIO or USART6_TX |
| פין 35 | PC7 — GPIO or USART6_RX |
| פין 36 | PC8 — GPIO or USART3_TX |
| פין 37 | PC9 — GPIO or USART3_RX |
| פין 38 | PA8 — GPIO or USB_OTG_FS_SOF |
| פין 39 | PA9 — GPIO or USB_OTG_FS_VBUS |
| פין 40 | PA10 — GPIO or USB_OTG_FS_ID |
| פין 41 | PA11 — GPIO or USB_OTG_FS_DM |
| פין 42 | PA12 — GPIO or USB_OTG_FS_DP |
| פין 43 | PA13 — GPIO or SWDIO |
| פין 44 | PA14 — GPIO or SWCLK |
| פין 45 | PA15 — GPIO or JTDI |
| פין 46 | PC10 — GPIO or USART4_TX |
| פין 47 | PC11 — GPIO or USART4_RX |
| פין 48 | PC12 — GPIO or USART5_TX |
| פין 49 | PD2 — GPIO or USART5_RX |
| פין 50 | PB3 — GPIO or SPI1_SCK |
| פין 51 | PB4 — GPIO or SPI1_NSS |
| פין 52 | PB5 — GPIO or I2C1_SMBA |
| פין 53 | PB6 — GPIO or I2C1_SCL |
| פין 54 | PB7 — GPIO or I2C1_SDA |
| פין 55 | BOOT0 — Boot mode selection |
| פין 56 | PB8 — GPIO or CAN_RX |
| פין 57 | PB9 — GPIO or CAN_TX |
| פין 58 | VDD — Digital power supply |
| פין 59 | VSS — Ground |
| פין 60 | PC13 — GPIO or RTC_TAMP1 |
| פין 61 | PC14 — GPIO or OSC32_IN |
| פין 62 | PC15 — GPIO or OSC32_OUT |
| פין 63 | VDDA — Analog power supply |
| פין 64 | VSSA — Analog ground |
יישומים טיפוסיים
STM32L471RET6 מתאים עבור 6 יישוםs: 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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור STM32L471RET6 — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | 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 |
מבדילים עיקריים
- Ultra-low-power modes with 100 nA shutdown current (לעומתGD32F450RET6)
- Wide supply voltage range (1.71V to 3.6V) (לעומתGD32F450RET6)
- Rich analog peripherals (12-bit ADC, 12-bit DAC, comparators, op-amps) (לעומתSTM32L475RGT6)
הערות תכנון
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.
מידע על תאימות
RoHS compliant per STMicroelectronics product page. Not AEC-Q100 qualified; for automotive, consider STM32L4 series with AEC-Q100 qualification.
