AdTEC | Protocol Converter Unit
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Protocol Converter Unit

  • Main Control System
  • Based on Intel Processor 80486DX2 with necessary I/O Interfaces.
  • Flight qualified
  • Rigid – Flexi – Rigid Single board design
  • Design, development, from user requirements, prototyping, qualification, Integration with other onboard systems, MIL498 documentation.
  • Quality Process/Production Process documentation
  • Production : 120 Completed. 200 in Progress.

PCU has the following specifications:
Controller board

  • AT91SAM9263 32-bit microcontroller, based on the ARM926EJ-S processor, architecture on a 9-layer matrix, allowing a maximum internal bandwidth of nine 32-bit buses and a large set of standard peripherals.
  • There are five 32-bit Parallel Input/output Controllers (PIOA, PIOB, PIOC, PIOD and PIOE) 160 Programmable I/O Lines Multiplexed with Up to Two Peripheral I/O Input Change Interrupt Capability on Each I/O Line. Individually Programmable Opendrain, Pull-up Resistor and Synchronous Output.
  • User Defined FPGA for 1553 bus protocol and for local bus communication.
  • On board memory storage and different booting options.
  • RS 422 transmission as well as on board debug options.
  • On board 64Mbytes of System memory implemented using two SDRAMs, a NAND Flash of 256 Mbytes, a NOR Flash of 8MBytes and a Serial EEPROM of 512Kbits and SRAM of 4MB are available. The Card Boot up can be either from Internal ROM, NAND Flash, NOR Flash or Serial EEPROM.
  • Taking advantage of a rich set of peripheral available on-chip the card provides for all the required serial ports, Ethernet ports, and USB ports.
  • A full speed Ethernet Port is provided with an on-chip MAC plus external PHY device.
  • There is an on-board lattice 1553 FPGA, which is customizable to handle various glue logic. A separate JTAG connector is provided for programming and downloading of configuration files to the FPGA.
    Front panel board
    This board interfaces external world signals to the controller-card, which uses two circular connectors on the front panel.

  • J1 – Power circular connector
  • J2 – IO connector which has 1553, RS 422, JTAG and Debug ports


  • Firmware will handle the 1553B initialization to configure in monitor terminal and captured messages from the MIL1553B bus will be converted to RS 422 protocol as per the technical requirements given by INS-BETWA.
  • Firmware can be configured into two modes i.e. Operating mode and Debugging mode.
  • In Operating mode the firmware will capture the specific message as per the specification and convert the same to specific format on RS422.
  • In Debugging mode, the new firmware can be updated via RS422/JTAG. This mode will be useful to configure the MIL1553B to Remote terminal mode or for the user customization as per the MIL1553-B standard specification.

CPU and Memory

  • ARM926EJ-S Processor
  • 64Mbytes of SDRAM
  • 256 Mbytes of NAND Flash
  • 8Mbytes of NOR Flash
  • 512Kbits of Serial EEPROM
  • 4MB of SRAM
    Communication Ports

  • One 10/100 Mbps Ethernet interface
  • 1x USB 2.0 port
  • One RS422 port
  • One JTAG/ICE connector
  • One Debug RS232 serial communication port
    MIL-STD-1553B Interface
    1553 Bus Monitor (MT)

  • Word monitor per word basis
  • Selective message monitor & time stamping
  • Dynamic data updation
  • Message Periodicity
  • Bus error status
  • Bus load
  • Unique Message identifier
  • Record and Replay option
  • 100% data capture at full bus rates
  • Programmable data logging to file
  • Sequential record includes: command/status/data words, time-tag, errors, bus, and response time(s)
    Software Support

  • Driver and high-level API libraries for Windows 7
  • Sample applications provided

  • Durable Enclosure with covers for connectors
    Electrical Specification

  • Input: +24 VDC
  • Power: ~5W
  • Operating Temperature: -40°C to +85°C
  • Storage Temperature: -20°C to +70°C
    Mechanical Specification

  • Dimensions: 204 x 145 x 67 (L x W x H)
  • Weight: ~3 Kg Approx
  • Material: Aluminum Alloy
  • Mounting: Surface mountable

  • 1 year limited warranty