Title :
A SEM-E module avionics computer with PI-Bus backplane communication
Author :
Dougherty, Michael J.
Author_Institution :
Texas Instrum. Inc., Dallas, TX, USA
Abstract :
The author describes the system architecture of a MIL-STD-1750A-based mission processor utilizing dual VHSIC Phase 2 TM-Bus and dual VHSIC Phase 2 PI-Bus for intermodule level communication. The mission processor consists of 18 surface-mount SEM-E modules and five high-density power supplies mating with an 18 layer G-10 backplane in an air-cooled chassis. The system-level interfaces consists of a dual PI-Bus for intermodule communication, a dual TM-Bus for intermodule operational test and maintenance, an IEEE-488 interface to an external software development platform, two differential small computer system interface (SCSI) buses, three dual redundant MIL-STD-1553B serial communication buses, and several digital and analog discrete I/Os. The author presents a comparison of the defined cycle sequence of each of the basic PI-Bus messages to the observed cycle structure of these message types in the system. The impact of chaining a sequence of PI-Bus messages is examined. Data on the impact of PI-Bus traffic on module performance under various conditions are examined
Keywords :
VLSI; aircraft instrumentation; computer architecture; computer interfaces; microprocessor chips; military equipment; G-10 backplane; IEEE-488 interface; PI-Bus backplane communication; PI-Bus traffic; SEM-E module avionics computer; Texas Instruments; air-cooled chassis; computer interfaces; dual TM-Bus; dual VHSIC Phase 2 TM-Bus; dual redundant MIL-STD-1553B serial communication buses; high-density power supplies; intermodule communication; mission processor; surface-mount SEM-E modules; system-level interfaces; Aerospace electronics; Analog computers; Backplanes; Computer architecture; Computer interfaces; Power supplies; Programming; Software testing; System testing; Very high speed integrated circuits;
Conference_Titel :
Aerospace and Electronics Conference, 1990. NAECON 1990., Proceedings of the IEEE 1990 National
Conference_Location :
Dayton, OH
DOI :
10.1109/NAECON.1990.112761
