Kinetis® K21 120 MHz Tower® System Module


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Product Details

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Supported Devices

Processors and Microcontrollers

K2x / KS2x USB



  • 120 MHz
  • 1 MB flash
  • 128 KB RAM
  • FPU
  • Tamper Detection
  • Encryption
  • Low Power
  • 121 MAPBGA

Power Management

  • Independent, battery operated power supply for real-time clock and tamper detection modules


  • Three-axis accelerometer (MMA8451Q)
  • Dual-role USB interface with Micro-AB USB connector
  • Open-source JTAG® (OSJTAG) circuit with virtual serial port
  • General-purpose Tower® plug-in (TWRPI) socket
  • Four user controlled status LEDs
  • Push buttons for GPIO interrupt and MCU reset
  • Potentiometer, SD card socket and coin cell battery holder

MCUXpresso Software and Tools

Buy Options

  • TWR-K21F120MA

  • Tower System Development Board for Kinetis K21 and K22 (120 MHz, 512 KB-1 MB Flash) MCUs.

  • $228.85 USD
  • For a quantity of 1
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Quick reference to our documentation types.

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Design Resources

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Design Files

2 design files

  • Printed Circuit Boards and Schematics

    TWR-K21F120MA Schematic files

  • Printed Circuit Boards and Schematics

    TWR-K21F120MA Design Files


1-5 of 6 software files

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Note: For better experience, software downloads are recommended on desktop.


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