Overview
The STM32L432KBU6 is an ultra-low-power microcontroller from STMicroelectronics, based on the high-performance Arm® Cortex®-M4 32-bit RISC core. This microcontroller 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 part of the STM32L432xx family, which is designed for low-power applications, offering various power-saving modes and a comprehensive set of peripherals. It includes high-speed memories such as up to 256 Kbyte of Flash memory and 64 Kbyte of SRAM, along with a Quad SPI flash memory interface.
Key Specifications
| Parameter | Value |
|---|---|
| Core | Arm® 32-bit Cortex®-M4 CPU with FPU |
| Frequency | Up to 80 MHz |
| Flash Memory | Up to 256 KB |
| SRAM | 64 KB (including 16 KB with hardware parity check) |
| Power Supply | 1.71 V to 3.6 V |
| Temperature Range | -40 °C to 85/105/125 °C |
| ADC | 12-bit, 5 Msps |
| DAC | 2x 12-bit output channels |
| Timers | 11x timers (including 1x 32-bit, 4x 16-bit general purpose, 2x 16-bit basic, 2x low-power 16-bit timers) |
| Communication Interfaces | USB 2.0 full-speed, 2x I2C, 3x USARTs, 2x SPIs, CAN 2.0B, SWPMI |
| Package | UFQFPN 32 5x5x0.55 mm |
Key Features
- Ultra-low-power with FlexPowerControl
- 1.71 V to 3.6 V power supply
- -40 °C to 85/105/125 °C temperature range
- Low power modes: 8 nA Shutdown, 28 nA Standby, 280 nA Standby with RTC, 1.0 μA Stop 2 mode, 1.28 μA with RTC
- 84 μA/MHz run mode
- Batch acquisition mode (BAM) and 4 μs wakeup from Stop mode
- Brown out reset (BOR) and interconnect matrix
- Adaptive real-time accelerator (ART Accelerator™) for 0-wait-state execution from Flash memory
- Up to 26 fast I/Os, most 5 V-tolerant
- RTC with HW calendar, alarms, and calibration
- Up to 3 capacitive sensing channels
- Rich analog peripherals including 12-bit ADC, 12-bit DAC, operational amplifier, and ultra-low-power comparators
Applications
The STM32L432KBU6 is suitable for a wide range of applications requiring low power consumption and high performance. These include:
- IoT devices and smart home appliances
- Industrial automation and control systems
- Medical devices and healthcare equipment
- Automotive systems and telematics
- Consumer electronics and wearable devices
- Energy harvesting and battery-powered devices
Q & A
- What is the core architecture of the STM32L432KBU6?
The STM32L432KBU6 is based on the Arm® 32-bit Cortex®-M4 CPU with a Floating Point Unit (FPU).
- What is the maximum operating frequency of the STM32L432KBU6?
The maximum operating frequency is up to 80 MHz.
- What are the power supply and temperature ranges for the STM32L432KBU6?
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 types of timers are available on the STM32L432KBU6?
The device includes 11 timers: 1x 32-bit, 4x 16-bit general purpose, 2x 16-bit basic, and 2x low-power 16-bit timers.
- What communication interfaces are supported by the STM32L432KBU6?
The device supports USB 2.0 full-speed, 2x I2C, 3x USARTs, 2x SPIs, CAN 2.0B, and SWPMI.
- What is the package type of the STM32L432KBU6?
The package type is UFQFPN 32 5x5x0.55 mm.
- What are the low power modes available on the STM32L432KBU6?
The device offers several low power modes including Shutdown, Standby, and Stop 2 modes, with current consumptions as low as 8 nA, 28 nA, and 1.0 μA respectively.
- Does the STM32L432KBU6 support capacitive sensing?
Yes, the device supports up to 3 capacitive sensing channels.
- What are the key analog peripherals of the STM32L432KBU6?
The device includes a 12-bit ADC, 12-bit DAC, operational amplifier, and ultra-low-power comparators.
- Is the STM32L432KBU6 RoHS compliant?
Yes, the STM32L432KBU6 is RoHS compliant with an Ecopack2 grade.
- What is the purpose of the Adaptive Real-Time Accelerator (ART Accelerator™) in the STM32L432KBU6?
The ART Accelerator™ allows for 0-wait-state execution from Flash memory, enhancing performance.
