Data communication with CSMA/CA arbitration allows multiplex communication networks over noisy DC powerlines at powerline bit rates of up to 1.4Mbit/s using the UART/ SPI/ DMX512/ RDM/I2C interfaces.


The DCB1M is a transceiver for message communication allowing multi-master network topology. The device designed to operate over noisy power lines.

The device interfaces with UART, SPI, DMX512, RDM and I2C protocols. The entire firmware is implemented in small-size ASIC. Its IP can be ported as part of a customer's design such as the Internet of Things (IoT) sub-network.



The DCB1M building blocks are divided into the following blocks:

  • Protocol handling block interprets the host protocol.
  • Transmit and Receive internal FIFOs, each has 1k bytes as a buffer between the host and the DC-BUS power line.
  • CODEC block encodes/decodes the message using 3 levels of data protection according to channel noise conditions.
  • Modem block, modulate, and demodulate messages using a phase-shift keying scheme.
  • CSMA/CA mechanism add Carrier sense and arbitration capabilities to the device
  • Sleep mechanism ensures low power operation during sleep mode. The device senses the bus for a short period to detect possible wake-up messages from other devices connected to the power line.

Multiple DC-BUS networks using single powerline example




  • Robust communication over DC or AC power line.
  • Powerline bit rates of up to 1.4Mbit/s.
  • 251 selectable carrier frequencies.
  • Variable error correction codes, to match the channel conditions.
  • Multiplex CSMA/CA mechanism .
  • Supports UART, SPI, DMX512, RDM and I2C protocols.
  • Hard-coded 48 bit UUID.
  • Sleep Mode for low power consumption
  • Small size design.


  • LED
  • BMS
  • Data, Audio and Video streaming.
  • Sub network for IoT
  • Data transfer over powerline
  • Redundant powerline network.
  • SPI sensor BUS
  • Security networks.


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