AFE Board

• ATM90E32AS: poly-phase energy metering AFE chip
• Voltage sampling: resistor divider network
• Current sampling: Current Transformer (CT) or Rogowski Coil for current sensor
• Energy pulses
  • Active energy pulse indicator and isolated output
  • Reactive energy pulse indicator and isolated output
  • Apparent energy pulse indicator and isolated output
  • Fundamental energy pulse indicator and isolated output
  • Harmonic energy pulse indicator and isolated output

• One communication connector
• Crystal: 16.384MHz

• Power supply for demo board
  • AC 100V-240V line voltage input
  • DC 9V input
  • External 3.3V input

Control Board

• SAM4C microcontroller
• Two possible power sources
  • External DC9V
  • External 3.3V from the daughter board

• Digital I/O
  • Five mechanical buttons
    • On reset button
    • Two switch buttons for display (including forward and backward button)
    • Two wake up buttons (one is FWUP, the other is TMP0)
  • One extension header
  • One communication connector

• Segment LCD display
• Five types of communication interfaces
  • One USB
  • One RS485
  • One RS232
  • One Infrared Radiation (IR)
  • One Optical Infrared Radiation (OIR)
• One EEPROM