Kinetis® KL2x-72/96 MHz, USB Ultra-Low-Power Microcontrollers (MCUs) based on Arm® Cortex®-M0+ Core

KL2x

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The Kinetis® KL2x is an ultra-low-power MCU family that adds a full-speed USB 2.0 On-the-Go (OTG) controller or a full-speed crystal-less USB 2.0 device controller in addition to the Kinetis KL1x series.

The Kinetis KL2x MCU family is compatible with Kinetis K20 MCUs (based on Arm® Cortex®-M4), and with all other Kinetis KL1x, KL2x, KL3x, and KL4x series MCUs, providing a migration path to lower and higher performance and feature integration.

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Block Diagram

Kinetis L Series KL2x MCUs

Kinetis L Series KL2x MCUs

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, keeping an 8-bit look and feel?
  • Multiple flexible low-power modes, including new computer clocking option which reduces dynamic power by placing peripherals in an asynchronous stop mode
  • LPUART, SPI, I²C, FlexIO, ADC, DAC, LP timer and DMA support low-power mode operation without waking up the core

Memory

  • Up to 512KB flash, up to 128KB SRAM
  • Security circuitry to prevent unauthorized access to RAM and flash contents
  • Up to 32KB ROM and built-in bootloader simplifies the effort to program MCU and allows for easy flash upgrades

Performance

  • Cortex-M0+ core, 72MHz/96MHz 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 8-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
  • High-speed comparator with internal 6-bit DAC
  • 12-bit DAC with DMA support
  • 1.2 V and 2.1 V voltage references (Vref)

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

  • Capacitive touch sense interface supports 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
  • FlexIO for universal or customized serial peripheral emulation
  • High accuracy internal clock reference to support high-performance communication
  • Up to 3 I2C with DMA support, up to 1Mbps and compatible with SMBus V2 features
  • Up to 3 LPUART with DMA support
  • Up to 3 SPI with DMA support
  • I²S module for audio applications
  • FlexIO module supports a wide range of protocols including UART, I²C, SPI, I²S, PWM waveform generation
  • Smart card interface VMSIM (ISO7816-E)

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