Overview
The STM32L476RGT6U, produced by STMicroelectronics, is an ultra-low-power microcontroller based on the Arm® Cortex®-M4 32-bit CPU with a floating-point unit (FPU). This MCU is part of the STM32L4 series, known for its high performance and low power consumption, making it ideal for a wide range of applications, including IoT devices, industrial control systems, and consumer electronics.
The device features advanced power-saving modes, a comprehensive set of peripherals, and robust security mechanisms, ensuring efficient and secure operation in various environments.
Key Specifications
| Specification | Details |
|---|---|
| Core | Arm® 32-bit Cortex®-M4 CPU with FPU, up to 80 MHz |
| Performance | 100 DMIPS, 1.25 DMIPS/MHz (Drystone 2.1), 273.55 CoreMark® |
| Memory | Up to 1 MB Flash, 128 KB SRAM |
| Power Supply | 1.71 V to 3.6 V (internal LDO), 1.05 to 1.32 V (external SMPS) |
| Temperature Range | -40 °C to +85/105/125 °C |
| Power Modes | VBAT mode: 300 nA, Shutdown mode: 30 nA, Standby mode: 120 nA, Stop 2 mode: 1.1 µA |
| Clock Sources | 4 to 48 MHz crystal oscillator, 32 kHz crystal oscillator for RTC, internal 16 MHz RC oscillator |
| Communication Interfaces | 3x I2C, 3x SPI, 3x USART, 2x UART, 1x Low-Power UART, 2x SAIs, 1x SDMMC, 1x CAN, 1x USB OTG full-speed |
| Analog Peripherals | 3x 12-bit ADCs, 2x 12-bit DACs, 2x operational amplifiers, 2x comparators |
| Timers | 16x timers: 2x 16-bit advanced motor-control, 2x 32-bit, 5x 16-bit general purpose, 2x low-power 16-bit timers |
| Package | Available in 64-pin to 144-pin packages |
Key Features
- Ultra-low-power with FlexPowerControl, enabling various power-saving modes such as VBAT, Shutdown, Standby, and Stop 2 modes.
- Arm® 32-bit Cortex®-M4 CPU with FPU, Adaptive real-time accelerator (ART Accelerator™) for 0-wait-state execution from Flash memory.
- Comprehensive set of communication interfaces including I2C, SPI, USART, UART, SAIs, SDMMC, CAN, and USB OTG full-speed.
- Advanced analog peripherals including 12-bit ADCs, 12-bit DACs, operational amplifiers, and comparators.
- Integrated LCD driver with step-up converter and support for up to 24 capacitive sensing channels.
- RTC with hardware calendar, alarms, and calibration.
- Multiple clock sources and PLLs for system clock, USB, audio, and ADC.
- Support for external memory interfaces and independent power supplies for analog and digital components.
Applications
- Internet of Things (IoT) devices: The ultra-low power consumption and advanced communication interfaces make it suitable for IoT applications.
- Industrial control systems: The device's robust peripherals and power-saving modes are ideal for industrial automation and control systems.
- Consumer electronics: Used in various consumer electronics due to its high performance and low power consumption.
- Medical devices: Suitable for medical devices requiring precise analog measurements and low power consumption.
- Automotive systems: Can be used in automotive systems due to its robustness and wide temperature range.
Q & A
- What is the core architecture of the STM32L476RGT6U?
The core architecture is based on the Arm® 32-bit Cortex®-M4 CPU with a floating-point unit (FPU).
- What are the power supply ranges for the STM32L476RGT6U?
The device operates from a 1.71 V to 3.6 V power supply using the internal LDO regulator, and from 1.05 to 1.32 V using an external SMPS supply.
- What are the key power-saving modes of the STM32L476RGT6U?
The device features VBAT mode, Shutdown mode, Standby mode, and Stop 2 mode, among others, to minimize power consumption.
- What communication interfaces are available on the STM32L476RGT6U?
The device includes I2C, SPI, USART, UART, SAIs, SDMMC, CAN, and USB OTG full-speed interfaces.
- What is the maximum frequency of the Arm® Cortex®-M4 CPU in the STM32L476RGT6U?
The CPU operates at a maximum frequency of 80 MHz.
- How much memory does the STM32L476RGT6U have?
The device has up to 1 MB of Flash memory and 128 KB of SRAM.
- What are the temperature ranges supported by the STM32L476RGT6U?
The device operates in the -40 °C to +85/105/125 °C temperature range.
- Does the STM32L476RGT6U support external memory interfaces?
Yes, it supports external memory interfaces for static memories such as SRAM, PSRAM, NOR, and NAND.
- What is the purpose of the ART Accelerator™ in the STM32L476RGT6U?
The ART Accelerator™ allows for 0-wait-state execution from Flash memory, enhancing performance.
- Can the STM32L476RGT6U be used in automotive applications?
Yes, due to its robustness and wide temperature range, it is suitable for automotive systems.
