NXP KM3x

The KM3x MCU family enables single-chip one-, two-, and three-phase electricity meters, as well as flow meters and other precision measurement applications. This family of MCUs:

• Provides security with active and passive tamper detection with time stamping
• Supports high-precision internal voltage reference with low temperature drift
• Features a comprehensive enablement suite including reference designs

Features

• MCU
  • High-performance Arm® Cortex®-M0 core, up to 75 MHz of core clock frequency
  • 512 KB/256 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 Font 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
  • Memory Mapped Cryptographic Acceleration Unit (MMCAU) for AES Encryption
  • Cyclic Redundancy Check (CRC)
• Interfaces 
  • 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 105°C

Applications 

• Automotive
  • Heating Ventilation, and Air Conditioning (HVAC)
  • Motorcycle Engine Control Unit (ECU) and Small Engine Control
  • Smart Car Access
• Industrial
  • 3-Phase AC Induction Motor
  • Air Conditioning (AC)
  • Brushless DC Motor (BLDC) Control
  • Building Safety
  • Electricity Grid and Distribution
  • Electricity Meter
  • Energy Gateway
  • Gas Meter
  • Heat Metering
  • Motion Control and Robotics
  • Permanent Magnet Synchronous Motor (PMSM)
  • Smart Lighting
  • Smart Power Socket and Light Switch
  • Water Meter
• Mobile
  • Input Device (Mouse, Pen, Keyboard)
• Smart City
  • Automatic Vehicle Identification
  • Transport Ticketing
• Smart Home
  • Home Security and Surveillance
  • Major Home Appliances
  • Robotic Appliance
  • Small and Medium Appliances

Block diagram