Overview
The STM32L475RCT3 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 STM32L475RCT3 is part of the STM32L475xx family, which is known for its low power consumption and extensive range of peripherals. It includes high-speed memories, a flexible external memory controller, and a Quad SPI flash memory interface. The device is designed to offer high performance while minimizing power usage, making it suitable for a wide range of applications that require low energy consumption.
Key Specifications
| Specification | Details |
|---|---|
| Core | ARM® 32-bit Cortex®-M4 CPU with FPU, up to 80 MHz |
| 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 |
| Power Supply | 1.71 V to 3.6 V |
| Temperature Range | -40 °C to 85/105/125 °C |
| Low 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 Stop 2 with RTC |
| Timers | 16x timers: 2x 16-bit advanced motor-control, 2x 32-bit, 5x 16-bit general purpose, 2x 16-bit basic, 2x low-power 16-bit timers |
| Analog Peripherals | 2x 12-bit ADC 5 Msps, 2x 12-bit DAC output channels, 2x operational amplifiers, 2x ultra-low-power comparators |
| Communication Interfaces | USB OTG 2.0 full-speed, 2x SAIs, 3x I2C FM+, 5x USARTs, 3x SPIs, CAN (2.0B Active), SDMMC interface |
| Package | LQFP 64 10x10x1.4 mm |
Key Features
- Ultra-Low Power Consumption: Features like FlexPowerControl, low power modes (VBAT, Shutdown, Standby, Stop 2), and a brown out reset (BOR) ensure minimal energy usage.
- High Performance Core: ARM® 32-bit Cortex®-M4 CPU with FPU, Adaptive real-time accelerator (ART Accelerator™), and DSP instructions.
- Extensive Peripherals: Includes up to 114 fast I/Os, most 5 V-tolerant, and a wide range of analog and digital peripherals such as ADCs, DACs, operational amplifiers, and comparators.
- Advanced Communication Interfaces: Supports USB OTG 2.0, serial audio interfaces (SAIs), I2C, USARTs, SPIs, CAN (2.0B Active), and SDMMC interface.
- Capacitive Sensing: Up to 21 capacitive sensing channels supporting touchkey, linear, and rotary touch sensors.
- Memory Protection: Includes readout protection, write protection, proprietary code readout protection, and Firewall for embedded Flash memory and SRAM.
Applications
The STM32L475RCT3 is versatile and can be used in a variety of applications that require low power consumption and high performance. Some typical applications include:
- Industrial Automation: Motor control, sensor interfaces, and communication in industrial automation systems.
- Medical Devices: Portable medical devices, health monitors, and diagnostic equipment.
- Consumer Electronics: Smart home devices, wearables, and other battery-powered consumer electronics.
- Automotive Systems: In-vehicle infotainment, driver assistance systems, and other automotive applications requiring low power and high reliability.
- IoT Devices: Internet of Things (IoT) devices that need to balance performance with power efficiency.
Q & A
- What is the core architecture of the STM32L475RCT3?
The STM32L475RCT3 is based on the ARM® 32-bit Cortex®-M4 CPU with a Floating Point Unit (FPU).
- What is the maximum operating frequency of the STM32L475RCT3?
The maximum operating frequency is up to 80 MHz.
- What are the power supply and temperature range specifications?
The power supply range is 1.71 V to 3.6 V, and the temperature range is -40 °C to 85/105/125 °C.
- What are the low power modes available on the STM32L475RCT3?
The device features VBAT mode (300 nA), Shutdown mode (30 nA), Standby mode (120 nA), and Stop 2 mode (1.1 µA) among others.
- What types of timers are available on the STM32L475RCT3?
The device includes 16 timers: 2x 16-bit advanced motor-control, 2x 32-bit, 5x 16-bit general purpose, 2x 16-bit basic, and 2x low-power 16-bit timers.
- What analog peripherals are included in the STM32L475RCT3?
The device includes 2x 12-bit ADCs, 2x 12-bit DACs, 2x operational amplifiers, and 2x ultra-low-power comparators.
- What communication interfaces does the STM32L475RCT3 support?
The device supports USB OTG 2.0, SAIs, I2C, USARTs, SPIs, CAN (2.0B Active), and SDMMC interface.
- What is the package type of the STM32L475RCT3?
The package type is LQFP 64 10x10x1.4 mm.
- Does the STM32L475RCT3 support capacitive sensing?
Yes, it supports up to 21 capacitive sensing channels for touchkey, linear, and rotary touch sensors.
- What memory protection mechanisms are available on the STM32L475RCT3?
The device includes readout protection, write protection, proprietary code readout protection, and Firewall for embedded Flash memory and SRAM.
