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PLM-1 Modem ASSP for Power Line Communications


PLM-1

The single-chip µPD65942Y47 digital PLM-1 modem implements a half-duplex transmitter/receiver for power line communications (PLC). This IC offers superior performance and uses a narrowband frequency-shift keying (FSK) modulation technique combined with advanced processing functions.

A wide range of programmable baud rates and carrier frequencies provide design flexibility and allow sharing of the same power line medium with other systems and technologies. Protocol-neutral technology allows transporting of multiple protocols within one power line network and enables applications to use more than one protocol. Highly selective filtering and efficient error detection and correction algorithms also make reliable communication in noisy electrical environments possible.

In addition to the application-specific standard product (ASSP), the PLC IP used in the PLM-1 modem is available as a building block for ASIC design and can be migrated easily to any of NEC Electronics' process technologies.

Features

  • Very robust narrowband FSK modulation
  • Programmable transmission rate from 100 to 20,000 baud
  • Programmable communication frequency from 50 to 500 kHz
  • Complete media access control (MAC) logic
  • Carrier sense with multiple access collision detection (CSMA/CD) and resolution
  • Programmable automatic preamble generation
  • Programmable automatic packet-priority management with four levels
  • Cyclical redundancy check (CRC-16) error detection
  • High-efficiency forward error correction (FEC)
  • Full transaction-type management using unacknowledged and acknowledged messages
  • Nibble-oriented effi cient data encoding and decoding
  • Parallel interface and serial peripheral (SPI) interface
  • Protocol neutrality
  • RoHS-compliant


PLM-1-Based Power Line Transceiver

The PLM-1 modem IC uses a half-duplex transmitter/receiver function to interface between a host and the power line. Using either an SPI or parallel port, the host device is capable of sending information to and receiving commands from other devices connected to the power line. The device includes a complete set of high-level functions, enabling designers to easily implement high-performance PLC networks. The host can be any microcontroller with an SPI port or any computer with a parallel port.
PLM-1 Diagram


Ordering Information

Part Number: µPD65942GB-Y47-UES-A
Package: 44-pin plastic LQFP



Documentation


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