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STM32L432KCU6 - STMicroelectronics

Update Time: Mar 07, 2024      Readership: 233

 

The STM32L432KCU6, an ultra-low-power microcontroller manufactured by STMicroelectronics, boasts an Arm Cortex-M4 32-bit RISC core with a maximum operating frequency of 80 MHz and 256 KB of flash memory, complemented by a USB interface.

 

Tailored for applications demanding minimal power consumption, this microcontroller integrates several power-saving features, including low-leakage circuitry and various power-saving modes. Leveraging the widely acclaimed Arm Cortex-M4 core, renowned for its balance between performance and power efficiency, the STM32L432KCU6 stands as a formidable choice for embedded systems.

 

With sufficient memory capacity to accommodate a small operating system and application code, the STM32L432KCU6 facilitates versatile functionality. Its USB interface enables seamless connectivity with computers and other devices, expanding its utility across diverse applications.

 

Primed for wearable devices like fitness trackers and smartwatches due to its exceptional power efficiency, the STM32L432KCU6 also finds its place in internet-connected devices, facilitating data collection from the environment. Furthermore, its integration in industrial automation setups enables precise control over motors, sensors, and other peripherals.

 

For projects necessitating a low-power, multipurpose microcontroller, the STM32L432KCU6 emerges as a compelling choice, delivering a harmonious blend of power efficiency and versatility.

 

STM32L432KCU6 Specifications

 

Specification

Value

Product:

MCU+FPUs

Supply Voltage - Max:

3.6 V

Interface Type:

CAN, I2C, SAI, SPI, USART, USB

Data RAM Size:

64 kB

ADC Resolution:

12 bit

Packaging:

Tray

Maximum Operating Temperature:

+ 85 C

Processor Series:

STM32L432

Number of Timers/Counters:

11 Timer

Data RAM Type:

SRAM

Mounting Style:

SMD/SMT

Height:

0.6 mm

Length:

5 mm

Product Type:

ARM Microcontrollers - MCU

Brand:

STMicroelectronics

Program Memory Size:

256 kB

Core:

ARM Cortex M4

Moisture Sensitive:

Yes

Number of ADC Channels:

10 Channel

Number of I/Os:

26 I/O

Watchdog Timers:

Watchdog Timer, Windowed

Data Bus Width:

32 bit

Supply Voltage - Min:

1.71 V

Program Memory Type:

Flash

Tradename:

STM32

Width:

5 mm

Package / Case:

UFQFPN-32

Subcategory:

Microcontrollers - MCU

Unit Weight:

0.009877 oz

Maximum Clock Frequency:

80 MHz

 

STM32L432KCU6 Manufacturer - STMicroelectronics

STMicroelectronics is a multinational semiconductor company headquartered in Geneva, Switzerland. It is one of the world's largest semiconductor manufacturers, known for producing a wide range of integrated circuits and related devices for various applications.

 

The STM32L432KCU6 is one of the microcontrollers (MCUs) developed by STMicroelectronics. It belongs to the STM32L4 series, which is based on the ARM Cortex-M4 core. The Cortex-M4 core provides high performance and efficient processing capabilities suitable for a variety of embedded applications.

 

STM32L432xx Microcontrollers Descriptions

The STM32L432xx microcontrollers are part of the ultra-low-power STM32L4 series from STMicroelectronics, renowned for their energy efficiency and high performance. Here are some expanded details on various features and capabilities of these devices:

 

High-Performance Cortex-M4 Core: The Cortex-M4 core operates at frequencies of up to 80 MHz, providing substantial processing power for demanding applications while maintaining energy efficiency.

 

Floating Point Unit (FPU): The inclusion of an FPU enables efficient handling of floating-point operations, crucial for applications requiring high-precision mathematical calculations.

 

Memory Architecture: With up to 256 Kbytes of Flash memory and 64 Kbytes of SRAM, the STM32L432xx devices offer ample storage for program code and data, supporting complex applications. Additionally, the Quad SPI flash memories interface enhances external memory expansion capabilities.

 

Peripheral Connectivity: Extensive I/Os and peripherals, connected to multiple buses, facilitate flexible system integration and interfacing with external devices.

 

Security Features: Protection mechanisms such as readout protection, write protection, and proprietary code readout protection safeguard the embedded Flash memory and SRAM, enhancing the security of sensitive data and intellectual property.

 

Analog and Digital Peripherals: The microcontrollers are equipped with a rich set of analog peripherals including ADC, DAC, comparators, and operational amplifiers, enabling precise analog signal processing and sensor interfacing. Additionally, timers and PWM channels support various timing and motor control applications.

 

Capacitive Sensing: Up to 3 capacitive sensing channels provide support for touch-based user interfaces and proximity sensing applications.

 

Communication Interfaces: Standard and advanced communication interfaces such as UART, SPI, I2C, USB, and CAN enable seamless connectivity with external devices and networks, facilitating data exchange in diverse applications.

 

Temperature Range and Power Supply: The STM32L432xx devices operate reliably across a wide temperature range (-40 to +125 °C), making them suitable for harsh environmental conditions. Flexible power supply options and comprehensive power-saving modes enhance energy efficiency, prolonging battery life in portable and battery-powered applications.

 

Package Options: The family offers a single 32-pin package, providing compact form-factor options for space-constrained designs while maintaining versatility and functionality.

 

Overall, the STM32L432xx microcontrollers combine high performance, energy efficiency, and robust features, making them suitable for a wide range of embedded applications spanning industrial, consumer electronics, healthcare, and IoT sectors.

 

STM32L432xx Features

Power Management and Ultra-Low-Power Modes

The STM32L432xx microcontroller is optimized for ultra-low-power operation, making it ideal for battery-powered and energy-efficient applications. With its FlexPowerControl feature, it can operate within a wide voltage range of 1.71 V to 3.6 V and withstand extreme temperatures from -40 °C to 85/105/125 °C. The microcontroller offers various power-saving modes, including Shutdown mode, Standby mode, and Stop 2 mode, with incredibly low current consumption, ensuring prolonged battery life and efficient energy usage.

High-Performance Core Architecture

At the heart of the STM32L432xx lies a robust core architecture featuring an Arm® 32-bit Cortex®-M4 CPU with Floating-Point Unit (FPU). This core is complemented by an Adaptive Real-Time Accelerator (ART Accelerator™), enabling zero-wait-state execution from Flash memory at frequencies of up to 80 MHz. With DSP instructions and a Memory Protection Unit (MPU) for enhanced security, the microcontroller delivers exceptional performance, achieving benchmarks of 1.25 DMIPS/MHz and 273.55 CoreMark®.

Versatile Clocking Options and Peripheral Support

The microcontroller offers flexible clocking options, including internal RC oscillators and PLLs for system clock, USB, audio, and ADC. It also features various peripherals catering to diverse application requirements. Rich analog peripherals, such as high-speed ADC, DAC channels, operational amplifiers, and comparators, facilitate precision measurement and control tasks. Communication interfaces, including USB, SAI, I2C, USARTs, SPIs, CAN, and more, ensure seamless connectivity with external devices and networks.

Memory Resources and External Interface Capabilities

With ample memory resources, the STM32L432xx accommodates up to 256 KB of Flash memory with proprietary code readout protection and 64 KB of SRAM, including hardware parity check. Additionally, it supports external memory expansion through a Quad SPI memory interface, enhancing storage capabilities for data-intensive applications. The microcontroller also provides a robust development environment with features like serial wire debug (SWD), JTAG, and Embedded Trace Macrocell™ (ETM), facilitating efficient debugging and software development.

Environmental Compliance and Sustainability

In alignment with environmental sustainability goals, all packages of the STM32L432xx microcontroller comply with the ECOPACK2® standard. This commitment to environmental responsibility underscores STMicroelectronics' dedication to minimizing its ecological footprint and promoting sustainable manufacturing practices. By choosing the STM32L432xx, developers can contribute to environmentally friendly initiatives while benefiting from its advanced features and low-power operation.

 

STM32L432KB vs STM32L432KC

The STM32L432 microcontroller family from STMicroelectronics offers two variants with different flash memory sizes:

 

STM32L432KB: This variant has 128 KB of flash memory.

STM32L432KC: This variant has 256 KB of flash memory.

 

Both variants share similar features, including ultra-low-power operation, ARM Cortex-M4 core with FPU, high-speed memories, extensive peripheral set, communication interfaces, and various power-saving modes.

 

Features of the STM32L432 series:

Operating frequency: Up to 80 MHz

Ultra-low-power operation with FlexPowerControl

Operating voltage range: 1.71 V to 3.6 V

Temperature range: -40 °C to +85/105/125 °C

Shutdown mode current: 8 nA (with 2 wakeup pins)

Standby mode current: 28 nA (with 2 wakeup pins), 280 nA with RTC

Stop 2 mode current: 1.0 μA, 1.28 μA with RTC

Run mode current: 84 μA/MHz

Rich set of peripherals including ADC, DAC, comparators, timers, communication interfaces (USB, UART, SPI, I2C, CAN), DMA controller, true random number generator, CRC calculation unit, and more

Up to 26 fast I/Os, most of which are 5 V-tolerant

Memory options: Up to 256 KB single bank Flash with proprietary code readout protection, 64 KB of SRAM including 16 KB with hardware parity check, Quad SPI memory interface

Clock sources including internal RC oscillators, crystal oscillator, and PLLs for system clock, USB, audio, and ADC

Development support: Serial wire debug (SWD), JTAG, Embedded Trace Macrocell™

 

These microcontrollers are suitable for a wide range of applications requiring low-power operation and high performance, such as IoT devices, battery-powered devices, sensor nodes, and more.

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Stella Brinkley

Stella Brinkley is a senior electronics engineer with 6 years of experience, specializing in the detailed study of resistor, transistor and package design. Her comprehensive knowledge allows her to drive innovation and excellence in the electronics industry.

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