Overview
The STM32L475RET6TR 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) single precision, supporting 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 STM32L475RET6TR is designed for low-power applications, offering various power-saving modes such as Shutdown, Standby, and Stop modes, with ultra-low power consumption down to 30 nA in Shutdown mode and 100 μA/MHz in run mode. The device is packaged in a 64-pin LQFP package and is suitable for a wide range of applications requiring high performance and low power consumption.
Key Specifications
| Specification | Details |
|---|---|
| Core | ARM® 32-bit Cortex®-M4 CPU with FPU, up to 80 MHz |
| Memories | Up to 1 MB Flash, up to 128 KB SRAM |
| Power Supply | 1.71 V to 3.6 V |
| Temperature Range | -40 °C to 85/105/125 °C |
| ADCs | Up to 2 fast 12-bit ADCs (5 Msps) |
| DACs | 2 x 12-bit DAC channels |
| Timers | 2 x 32-bit, 9 x 16-bit, 2 x low-power 16-bit timers |
| Communication Interfaces | USB OTG 2.0, 3 x SPI, 3 x USART, 3 x I2C, CAN 2.0B |
| Capacitive Sensing Channels | Up to 21 channels |
| Package | LQFP 64 10x10x1.4 mm |
| Power Modes | Shutdown, Standby, Stop 2 modes |
| Low Power Consumption | 30 nA in Shutdown mode, 100 μA/MHz in run mode |
Key Features
- Ultra-low-power with FlexPowerControl, including Shutdown, Standby, and Stop 2 modes.
- High-performance ARM® Cortex®-M4 CPU with FPU, Adaptive real-time accelerator (ART Accelerator™), and DSP instructions.
- High-speed memories: up to 1 MB Flash and up to 128 KB SRAM.
- Rich analog peripherals: 2 x 12-bit ADCs, 2 x 12-bit DACs, 2 x operational amplifiers, and 2 x ultra-low-power comparators.
- Extensive range of enhanced I/Os and peripherals connected to two APB buses, two AHB buses, and a 32-bit multi-AHB bus matrix.
- Advanced communication interfaces: USB OTG 2.0, 3 x SPI, 3 x USART, 3 x I2C, and CAN 2.0B.
- Up to 21 capacitive sensing channels supporting touchkey, linear, and rotary touch sensors.
- Internal voltage reference buffer, low-power RTC, and multiple timers.
- True random number generator, CRC calculation unit, and 96-bit unique ID.
- Development support: serial wire debug (SWD), JTAG, and Embedded Trace Macrocell™.
Applications
- Industrial automation and control systems.
- Medical devices requiring low power consumption and high performance.
- Consumer electronics such as smart home devices and wearables.
- Automotive systems, including infotainment and driver assistance.
- IoT devices and smart sensors.
- Energy metering and smart grid applications.
Q & A
- What is the core architecture of the STM32L475RET6TR?
The STM32L475RET6TR is based on the ARM® Cortex®-M4 32-bit RISC core with a Floating Point Unit (FPU) and DSP instructions.
- What are the power supply and temperature ranges for this device?
The device operates from a 1.71 V to 3.6 V power supply and has a temperature range of -40 °C to 85/105/125 °C.
- What are the key analog peripherals available on this device?
The device features 2 x 12-bit ADCs, 2 x 12-bit DACs, 2 x operational amplifiers, and 2 x ultra-low-power comparators.
- What communication interfaces are supported by the STM32L475RET6TR?
The device supports USB OTG 2.0, 3 x SPI, 3 x USART, 3 x I2C, and CAN 2.0B.
- How many capacitive sensing channels does the device support?
The device supports up to 21 capacitive sensing channels.
- What are the power-saving modes available on this device?
The device offers Shutdown, Standby, and Stop 2 modes for ultra-low power consumption.
- What is the maximum frequency of the CPU?
The CPU operates at a frequency of up to 80 MHz.
- Does the device support external memory interfaces?
Yes, it supports external memory interfaces for static memories and a Quad SPI memory interface.
- What development tools are available for this device?
The device supports serial wire debug (SWD), JTAG, and Embedded Trace Macrocell™ for development.
- Is the device RoHS compliant?
Yes, the STM32L475RET6TR is RoHS compliant and ECOPACK2 certified.
