50 MHz, Mainstream Precision Metrology Microcontrollers based on Arm® Cortex®-M0+

KM1x

KM1x MCUs enable single-chip one-, two-, and three-phase electricity meters, as well as flow meter and other precision measurement applications.

  • Includes a powerful analog front end
  • Provides security, including memory protection, tamper detection, and protection of supplier/user data
  • Supports high-precision internal voltage reference with low temperature drift
  • Features a comprehensive enablement suite including reference designs

Product Details

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Block Diagram

KM1x MCUs

KM1x MCUs Block Diagram
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Features

MCU

  • High-performance Arm® Cortex®-M0 core, up to 50 MHz of core clock frequency
  • 128 KB/64 KB single array flash
  • Supports v6-M Instruction Set Architecture (ISA) including all 16-bit v7-M instructions plus a number of 32-bit thumb-2 instructions
  • PLL to generate clocks for AFE
    • Input range: 31.25 kHz to 39.0625 kHz
    • Output range: 11.72 MHz to 14.65 MHz
  • FLL to generate core, system and flash clocks
    • Input range: 31.25 kHz to 39.0625 kHz
    • Output range: 20 MHz to 50 MHz
  • Flexible modes of operation
  • Two internal trim-able clock references
    • 32 kHz
    • 4 MHz

Analog Front End

  • 24-bit sigma delta ADC with 94 dB SNR
  • Programmable gain amplifier with gains from 1 to 32 with low temperature drift
  • High precision internal voltage reference with low temperature drift

Security

  • Tamper detection with time stamping
  • Random number generator, memory protection unit

Interfaces

  • High accuracy RTC +5 ppm over temperature range
  • 4x UART, 2x SPI, 2x IIC

Operating Voltage and Temperature Range

  • Voltage range 1.71 volts - 3.6 volts (without AFE)
  • Voltage range 2.7 volts - 3.6 volts (with AFE)
  • Temperature range -40°C to 85°C

Documentation

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Design Resources

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Design Files

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  • Symbols and Footprints

    Kinetis® Symbols, Footprints and Models

    INTERNALRev 1.0Nov 27, 2017 11:23:001 KBCAD-SYMBOLFOOTPRINTS
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Hardware

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Software

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

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Training

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