Kinetis® KL4x-48 MHz, USB, Segment LCD, Ultra-Low-Power Microcontrollers (MCUs) based on Arm® Cortex®-M0+ Core

KL4x
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The Kinetis® KL4x MCU family combines ultra-low-power performance with a rich suite of analog, communication, timing and control peripherals (including a segment LCD controller) for applications like electronic scales, flow meters, smart meters, and thermostats.

  • Includes multiple flexible low-power modes, including new compute mode which reduces dynamic power by placing peripherals in an asynchronous stop mode
  • Features security circuitry to prevent unauthorized access to RAM and flash contents
  • Provides a migration path to lower and higher performance and feature integration through compatibility with other Kinetis families
  • Backed by robust development tools and software

Block Diagram

Kinetis L Series KL4x MCUs

Kinetis L Series KL4x MCUs
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Features

Ultra-Low-Power

  • Next-generation 32-bit Cortex®-M0+ core: 2x more CoreMark/mA than the closest 8/16-bit architecture.
  • Single-cycle fast I/O access port facilitates bit banging and software protocol emulation, maintaining an 8-bit look and feel?
  • Multiple, flexible low-power modes including new compute mode that reduces dynamic power by placing peripherals in an asynchronous stop mode
  • LPUART, SPI, I²C, ADC, DAC, LP timer and DMA support low-power mode operation without waking up the core

Memory

  • Up to 256 KB flash with 64-byte flash cache, up to 32 KB RAM
  • Security circuitry to prevent unauthorized access to RAM and flash contents
  • 16 KB ROM and built-in bootloader simplifies the effort to program MCU and allows for easy flash upgrades

Performance

  • Arm® Cortex®-M0+ core, 48 MHz core frequency over full voltage and temperature range (-40ºC to +105ºC)
  • Bit manipulation engine for improved bit handling of peripheral modules
  • Thumb instruction set combines high code density with 32-bit performance
  • Up to 4-ch. DMA for peripheral and memory servicing with reduced CPU loading and faster system throughput
  • Independent-clocked COP guards against clock skew or code runaway for fail-safe applications

Mixed-Signal

  • Up to 16-bit ADC with configurable resolution, sample time and conversion speed/power
  • Integrated temperature sensor
  • Single or differential input mode operation in order to achieve improved noise rejection
  • High-speed comparator with internal 6-bit DAC
  • 12-bit DAC with DMA support

Timing and Control

  • Two 6-ch. and one 2-ch., 16-bit low-power timer PWM modules with DMA support
  • 2-ch. 32-bit periodic interrupt timer provides time base for RTOS task schedule or trigger source for ADC conversion
  • Low-power timer allows operation in all power modes except for VLLS0
  • Real-time clock with calendar

Human-Machine Interface

  • Segment LCD interface
  • Capacitive touch-sensing inputs support up to 16 external electrodes and DMA data transfer
  • GPIO with pin interrupt support, DMA request capability and other pin control options

Connectivity and Communications

    • USB 2.0 On-The-Go (full-speed) with integrated USB low-voltage regulator supplies up to 120 mA off-chip at 3.3 volts to power external components from 5-volts input or USB 2.0 Device (full-speed) with clock recovery feature without the need of external crystal
    • Two I²C with DMA support, up to 1Mbps and compatible with SMBus V2 features
    • One LPUART and two UART with DMA support
    • Two SPI with DMA support
    • I²S module for audio applications
    • FlexIO for universal or customized serial peripheral emulation
    • High accuracy internal clock reference to support high-performance communication

Buy/Parametrics

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