Embedded Computers Allied Data Systems

Embedded Computers * Military and Avionic Data Bus Interfaces * Industrial Interfaces * PC/104

Military Data bus technology has always been one of our primary product areas.

Emerging Military Data Bus Technologies

DDC has been developing the next generation of Data bus technologies for use in military systems.

High Speed Fibre Channel

DDC has developed its line of high-speed Fibre Channel products to support the real-time processing demands of field-critical data networking between sensors, computer nodes, data storage, displays, and weapons, for air, sea, and ground military vehicles.

The FibreACCESS fibre channel PMC Network Access Controller (NAC) cards provide leading edge performance. This includes the capability to sustain “near line rate” data throughput of 106.25 or 212.5 MB/s, when operating at 1 or 2 Gb/s Fibre Channel signaling rates respectively, along with a memory-to-memory latency of less than 20 µS. The FibreACCESS fibre channel PMC cards are designed to operate in harsh environments, at temperatures from -40 °C to +85°C at the conduction cooled thermal interface.

Like FibreACCESS, the 16-port FibreMATRIX Fibre Channel fabric switch also supports Class 2 acknowledged and Class 3 unacknowledged Fibre Channel service. Based on DDC's own Fibre Channel technology, FibreMATRIX's architecture is optimized to meet the performance,reliability, and demanding environmental requirements of embedded, real time, military applications. FibreMATRIX's flexible, FPGA-based architecture can be tailored to a wide range of specific system requirements. DDC's FibreMATRIX technology has been designed to endure the multi-decade life cycle demands of military/aerospace programs, continuing DDC's demonstrated commitment as a long-term military COTS supplier of data networking products. Other features targeted for military applications include support for implicit login, 10/100 BASE-T Ethernet and RS-232 serial configuration ports; and ELS Clock Sync. In addition, the FibreMATRIX switch's universal port design provides scalability to networks with higher port counts.

The Next Generation 1553 ?


DDC has developed technology called HyPer-1553 that implements high speed digital data communication over legacy MIL-STD-1553 buses utilizing a broadband waveform such that this new high speed communication does not interfere with the legacy 1 Mbps 1553 communication


DDC has conducted research aimed at accelerating the speed of MIL-STD-1553 beyond its current 1 Mbps rate. The results of these tests showed that the data rate of MIL-STD-1553 can be reliably increased to 5 Mbps. DDC has developed prototype hardware that demonstrates the performance of Turbo-1553

TTP 1553 - SAE AS6003

Time Triggered Protocol (TTP) is an emerging data bus protocol that is finding its way into commercial aerospace applications. TTP is being released as an SAE Aerospace Standard (AS6003). Till now RS-485 has been the de facto physical layer standard for TTP, and has been utilized in commercial applications since 2002, including power generation and environmental control systems of premier aircraft such as the Boeing 787 and Airbus A380. Yet while TTP offers a deterministic protocol for the implementation of real-time distributed control systems, the low transmit levels and loosely defined receiver characteristics of RS-485 limits the ability to use it in flight critical aerospace applications. By combining commercial TTP controllers with a robust MIL-STD-1553 physical layer, DDC has developed a cost-effective method for commercial aircraft to reap the benefits of military proven dependability. MIL-STD-1553 has been designed specifically for aircraft applications, and has been the military data bus standard for decades. The many benefits of MIL-STD-1553 include well defined transmitter and receiver characteristics, and superior isolation, lightning protection, and fault tolerance, along with proven certification and validation advantages.