Overview
The STM32L422RBT6P is a highly advanced, ultra-low-power microcontroller from STMicroelectronics, based on the Arm® Cortex®-M4 32-bit CPU with an integrated floating-point unit (FPU). This microcontroller is part of the STM32L4 series, known for its exceptional power efficiency and robust feature set. It is designed to meet the demands of applications requiring high performance, low power consumption, and a wide range of peripherals.
The device features a comprehensive set of peripherals, including advanced timers, communication interfaces, and analog components, making it suitable for a variety of applications such as industrial control, medical devices, and IoT solutions.
Key Specifications
| Parameter | Value |
|---|---|
| Core | Arm® 32-bit Cortex®-M4 CPU with FPU |
| Maximum Clock Frequency | 80 MHz |
| Flash Memory | 128 KB single bank flash |
| SRAM | 40 KB (including 8 KB with hardware parity check) |
| Power Supply | 1.71 V to 3.6 V |
| Temperature Range | -40 °C to 85/125 °C |
| ADC Resolution | 12-bit (up to 16-bit with hardware oversampling) |
| Number of I/Os | Up to 52 fast I/Os, most 5 V-tolerant |
| Clock Sources | 4 to 48 MHz crystal oscillator, 32 kHz crystal oscillator for RTC, internal 16 MHz RC, and more |
| Communication Interfaces | USB 2.0, 3x I2C, 3x USART, 1x LPUART, 2x SPI, Quad SPI, IRTIM |
Key Features
- Ultra-low-power consumption: Features like FlexPowerControl, 300 nA in VBAT mode, 16 nA Shutdown mode, and 0.7 µA Stop 2 mode ensure minimal power usage.
- Advanced Core: Arm® 32-bit Cortex®-M4 CPU with FPU, Adaptive real-time accelerator (ART Accelerator™), and 100DMIPS performance.
- Analog Peripherals: Includes 2x 12-bit ADCs, 1x operational amplifier with PGA, and 1x ultra-low-power comparator.
- Security: AES 128/256-bit key encryption hardware accelerator and true random number generator.
- Communication: Rich set of communication interfaces including USB 2.0, I2C, USART, LPUART, SPI, and IRTIM.
- Timers and Clocks: 10 timers, including advanced motor-control, general-purpose, and low-power timers, along with various clock sources.
- Touch Sensing: Up to 12 capacitive sensing channels supporting touchkey, linear, and rotary touch sensors.
- Development Support: Serial wire debug (SWD), JTAG, and Embedded Trace Macrocell™.
Applications
- Industrial Control: Suitable for industrial automation, motor control, and sensor applications due to its robust peripherals and low power consumption.
- Medical Devices: Ideal for medical equipment requiring high precision, low power, and advanced security features.
- IoT Solutions: Perfect for Internet of Things applications needing efficient power management, multiple communication interfaces, and advanced security.
- Consumer Electronics: Can be used in various consumer electronics requiring low power and high performance, such as smart home devices and wearables.
Q & A
- What is the core architecture of the STM32L422RBT6P?
The STM32L422RBT6P is based on the Arm® 32-bit Cortex®-M4 CPU with an integrated floating-point unit (FPU).
- What is the maximum clock frequency of the STM32L422RBT6P?
The maximum clock frequency is 80 MHz.
- What is the power supply range for the STM32L422RBT6P?
The power supply range is from 1.71 V to 3.6 V.
- What types of communication interfaces does the STM32L422RBT6P support?
The device supports USB 2.0, I2C, USART, LPUART, SPI, Quad SPI, and IRTIM.
- What are the key ultra-low-power features of the STM32L422RBT6P?
Features include 300 nA in VBAT mode, 16 nA Shutdown mode, 0.7 µA Stop 2 mode, and more.
- Does the STM32L422RBT6P have any security features?
Yes, it includes an AES 128/256-bit key encryption hardware accelerator and a true random number generator.
- What types of timers are available on the STM32L422RBT6P?
The device includes 10 timers: 1x 16-bit advanced motor-control, 1x 32-bit, 2x 16-bit general-purpose, 1x 16-bit basic, 2x low-power 16-bit timers, and 2x watchdogs.
- What is the purpose of the ART Accelerator™ in the STM32L422RBT6P?
The ART Accelerator™ allows 0-wait-state execution from flash memory.
- Does the STM32L422RBT6P support touch sensing?
Yes, it supports up to 12 capacitive sensing channels for touchkey, linear, and rotary touch sensors.
- What development tools are available for the STM32L422RBT6P?
Development support includes serial wire debug (SWD), JTAG, and Embedded Trace Macrocell™.
