Overview
The STM32L432KCU3 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 microcontroller embeds high-speed memories, including up to 256 Kbytes of Flash memory and 64 Kbytes of SRAM. It also includes a Quad SPI flash memory interface and an extensive range of enhanced I/Os and peripherals connected to multiple buses.
The STM32L432KCU3 is designed for low-power applications, offering various power-saving modes such as Shutdown, Standby, and Stop modes, with ultra-low power consumption figures. It supports a wide temperature range from -40 °C to +85 °C, +105 °C, or +125 °C, depending on the package.
Key Specifications
| Parameter | Specification |
|---|---|
| Core | Arm® 32-bit Cortex®-M4 CPU with FPU, up to 80 MHz |
| Memories | Up to 256 KB Flash, 64 KB SRAM |
| Power Supply | 1.71 V to 3.6 V |
| Temperature Range | -40 °C to +85 °C, +105 °C, or +125 °C |
| ADC | 1x 12-bit ADC, 5 Msps |
| DAC | 2x 12-bit DAC output channels |
| Timers | 11 timers (including 1x 32-bit, 5x 16-bit, and 2x low-power 16-bit timers) |
| Communication Interfaces | USB 2.0, SAI, I2C, USARTs, SPI, CAN 2.0B Active |
| Package | UFQFPN 32 5x5x0.55 mm |
| Power Modes | Shutdown, Standby, Stop 2 modes |
| Current Consumption | 8 nA Shutdown, 28 nA Standby, 1.0 μA Stop 2 mode |
Key Features
- Ultra-low-power with FlexPowerControl
- Arm® 32-bit Cortex®-M4 CPU with FPU, up to 80 MHz
- Adaptive real-time accelerator (ART Accelerator™) for 0-wait-state execution from Flash memory
- High-speed memories: up to 256 KB Flash, 64 KB SRAM
- Quad SPI flash memory interface
- Rich analog peripherals: 12-bit ADC, 12-bit DAC, operational amplifier, ultra-low-power comparators
- Multiple communication interfaces: USB 2.0, SAI, I2C, USARTs, SPI, CAN 2.0B Active
- Up to 26 fast I/Os, most 5 V-tolerant
- RTC with HW calendar, alarms, and calibration
- True random number generator, CRC calculation unit, 96-bit unique ID
- Development support: serial wire debug (SWD), JTAG, Embedded Trace Macrocell™
Applications
The STM32L432KCU3 is suitable for a wide range of applications that require low power consumption and high performance. These include:
- IoT devices and smart sensors
- Industrial automation and control systems
- Medical devices and healthcare equipment
- Consumer electronics and wearables
- Automotive systems and telematics
- Energy management and metering systems
Q & A
- What is the core architecture of the STM32L432KCU3?
The STM32L432KCU3 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 STM32L432KCU3?
The device has up to 256 KB of Flash memory and 64 KB of SRAM.
- What is the power supply range for the STM32L432KCU3?
The power supply range is from 1.71 V to 3.6 V.
- What are the temperature ranges supported by the STM32L432KCU3?
The device operates in the -40 °C to +85 °C, +105 °C, or +125 °C temperature range.
- What analog peripherals are available on the STM32L432KCU3?
The device includes a 12-bit ADC, 12-bit DAC channels, an operational amplifier, and ultra-low-power comparators.
- What communication interfaces are supported by the STM32L432KCU3?
The device supports USB 2.0, SAI, I2C, USARTs, SPI, and CAN 2.0B Active interfaces.
- What are the power-saving modes available on the STM32L432KCU3?
The device offers Shutdown, Standby, and Stop 2 modes with ultra-low power consumption.
- What is the package type for the STM32L432KCU3?
The device is available in a UFQFPN 32 5x5x0.55 mm package.
- Does the STM32L432KCU3 support capacitive sensing?
Yes, the device supports up to 3 capacitive sensing channels.
- What development tools are supported by the STM32L432KCU3?
The device supports serial wire debug (SWD), JTAG, and Embedded Trace Macrocell™.
