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HDLC-cPCI - HDLC Communications Controller for CompactPCI

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The HDLC-cPCI is a four channel HDLC communications controller on a 3U CompactPCI card. The HDLC-cPCI uses high performance, industry standard serial communication controllers to provide 4 independent channels that can be configured for either HDLC-Synchronous or Asynchronous communication.

The HDLC-cPCI has been designed for demanding transportation and industrial applications. The HDLC-cPCI supports an extended temperature operation range of -40 to +85C. All 4 ports feature galvanic isolation up to 2000VRMS. Each of the 4 serial channels can be individually configured for operating with a RS-232, RS-422 or RS-485 electrical interface. Each channel has independent receive and transmit FIFOs that allow high speed serial data rates.

The HDLC-cPCI is available with software drivers for Linux and Windows.



  • 4 channel concurrent operation
  • Individually configurable for HDLC / Asynchronous operation
  • 2000Vrms galvanic isolation for each port
  • Selectable RS-232/422/485 electrical interface
  • Rugged, Locking I/O connectors
  • Extended temperature operation ( -40C to +85C)


  • Serial protocol conversion
  • Mass-Transit / Transportation
  • Vending Machines
  • POS and ATM systems
  • Remote instrumentation
  • LAN Gateway or Bridge
  • Embedded WAN
  • Locomotive Communications

Block Diagram

Block Diagram

Communications Controller

  • 32Bytes FIFO per channel
  • HDLC synchronous, Asynchronous operation


  • HDLC protocol support
  • Wide range of serial encoding methods:
    NRZ, NRZB, Biphase Mark (FM1), Biphase Space (FM0),
    Biphase Level (Manchester),
    Biphase Differential (Manchester Differential)
  • Up to 1MBit/sec multiple Ports (depends on host CPU)
  • Supporting differential TX-Data and RX-Data
  • Full-duplex operation
  • Abort Sequence generation and checking
  • Automatic zero bit insertion/deletion
  • Automatic flag insert


  • Programmable baud rates up to 115200bps
  • Full-duplex operation
  • 5,6,7, or 8 data bits per character
  • 1, 1.5, or 2 stop bits
  • Odd or Even parity

Physical Interface

  • Independent RS-232/RS-422/RS-485 ports
  • 2000Vrms galvanic isolation
  • Supporting TX-Data, RX-Data, CTS, RTS

Bus Interface

  • CompactPCI® Core Specification PICMG-2.0 Rev 3.0
  • 32-bit bus width, 33.33 MHz bus speed
  • Peripheral Slot

System Requirements

  • X86 PC-compatible CompactPCI host computer
  • 3.3V and 5V from CompactPCI backplane


  • Standard 3U compactPCI form factor

Operational characteristics

  • Operating temp 0C to +60C
  • Operating temp -40C to +85C (option)

Software Support

  • Linux
  • Windows

The following order codes can be used when ordering the HDLC-cPCI

HDLC-cPCI - 4-port HDLC Controller (0 to 60°C)
HDLC-cPCI-EXT - 4-port HDLC Controller (-40°C to +85°C)

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