Overview
The STM32L422KBU6 is an ultra-low-power microcontroller from STMicroelectronics, based on the high-performance Arm® Cortex®-M4 32-bit RISC core. This MCU 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 device is designed for low-power applications, offering various power-saving modes and a comprehensive set of peripherals and interfaces.
Key Specifications
| Specification | Details |
|---|---|
| Core | Arm® 32-bit Cortex®-M4 CPU with FPU, up to 80 MHz |
| Memory | 128 KB single bank flash, 40 KB SRAM (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 | 2x 12-bit ADC, 5 Msps, up to 16-bit with hardware oversampling |
| 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 |
| Communication Interfaces | 3x I2C, 2x SPI, 3x USART, 1x Low-Power UART, 1x USB full-speed device crystal less |
| Package | UFQFPN 32 5x5x0.55 mm |
| Power Modes | 300 nA in VBAT mode, 16 nA Shutdown mode, 32 nA Standby mode, 245 nA Standby mode with RTC |
| Clock Sources | 4 to 48 MHz crystal oscillator, 32 kHz crystal oscillator for RTC, internal 16 MHz and 32 kHz RC oscillators |
Key Features
- Ultra-low-power with FlexPowerControl
- Includes ST state-of-the-art patented technology
- Adaptive real-time accelerator (ART Accelerator™) allowing 0-wait-state execution from flash memory
- Up to 52 fast I/Os, most 5 V-tolerant
- RTC with HW calendar, alarms, and calibration
- Up to 12 capacitive sensing channels: support touchkey, linear, and rotary touch sensors
- AES hardware accelerator for 128/256-bit key encryption
- Quad SPI memory interface with XIP capability
- Rich analog peripherals (independent supply): 2x 12-bit ADC, 1x operational amplifier, 1x ultra-low-power comparator
Applications
The STM32L422KBU6 is suitable for a wide range of low-power applications, including:
- IoT devices and smart home appliances
- Wearable devices and health monitors
- Industrial automation and control systems
- Automotive systems requiring low power consumption
- Consumer electronics such as smart meters and energy management systems
Q & A
- What is the core architecture of the STM32L422KBU6?
The STM32L422KBU6 is based on the Arm® 32-bit Cortex®-M4 CPU with a Floating Point Unit (FPU), operating at up to 80 MHz. - What are the memory specifications of the STM32L422KBU6?
The device has 128 KB of single bank flash memory and 40 KB of SRAM, including 8 KB with hardware parity check. - What is the power supply range for the STM32L422KBU6?
The power supply range is from 1.71 V to 3.6 V. - What are the temperature ranges for the STM32L422KBU6?
The device operates in the -40 °C to 85/125 °C temperature range. - What types of timers are available on the STM32L422KBU6?
The device includes 1x 16-bit advanced motor-control timer, 1x 32-bit timer, 2x 16-bit general purpose timers, 1x 16-bit basic timer, and 2x low-power 16-bit timers. - What communication interfaces does the STM32L422KBU6 support?
The device supports 3x I2C, 2x SPI, 3x USART, 1x Low-Power UART, and 1x USB full-speed device crystal less. - What is the package type for the STM32L422KBU6?
The package type is UFQFPN 32 5x5x0.55 mm. - What are the power modes available for the STM32L422KBU6?
The device offers several power modes including 300 nA in VBAT mode, 16 nA Shutdown mode, 32 nA Standby mode, and 245 nA Standby mode with RTC. - Does the STM32L422KBU6 support capacitive sensing?
Yes, it supports up to 12 capacitive sensing channels for touchkey, linear, and rotary touch sensors. - Is there an AES hardware accelerator in the STM32L422KBU6?
Yes, the device includes an AES hardware accelerator for 128/256-bit key encryption.
