COM-1251 Curtiss-Wright PC/104 1553 Interface Board

The Parvus COM-1250 and COM-1251 PC/104 1553 Interface Boards provide the systems designer with an intelligent solution to MIL-STD-1553b multiplexed serial data design problems. These Commercial-Off-the-Shelf (COTS) PC/104 modules provide an interface from its one or two dual-redundant 1553 buses to any embedded PC/104 computer system bus. A PC/104 processor can then be used to access the 1553 Dual Bus to configure it for various modes of operation: Remote Terminal (RT) mode, Bus Control (BC) mode, or Monitor Terminal (MT) mode for a variety of 1553 military avionics and ground vehicle applications.

Satisfying all requirements of MIL-STD-1553B Notice II, the 1553 Dual Interface utilizes Aeroflex UTMC's SµMMIT MIL-STD- 1553 support chips, which offer automatic message handling, message status, general status polling and interrupt capability. The register-based interface architecture provides many programmable functions as well as extensive device maintenance information. Four/Eight 16-bit register locations within the SμMMIT and the Pseudo Dual Ported Memory (PDPM) allow complete access to interface functions through PC/104 I/O space. Software, including programmed I/O instructions (supplied with the board) can be used to access the PDPM and internal registers, and also be used to transfer data to and from the PDPM using Direct Memory Access (DMA). The SμMMIT chip can also cause interrupts to be generated and routed to the PC/104 processor.

This military/avionics databus interface operates in extended temperatures and is specifically designed to work with transformer-coupled stubs in military Local Area Network (LAN) applications, including airplanes, tanks, missiles, satellites and helicopters, as well as space and land-based systems to process data for navigation and altitude, weapon status indications, target tracks and electronic warfare lines.