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MIL-STD-1553 is a military standard published by the United States Department of Defense that defines the mechanical, electrical, and functional characteristics of a serial data bus.
Command Word . A Command Word format uses the first 5 bits for the address of the Remote Terminal (0 to 31). The sixth bit is 0 for Receive and 1 for Transmit. The next 5 bits indicate the subaddress/mode code bits. If this field is a 00000B or 11111B, the command is a Mode Code Command.
The standard allows for only three types of words as discussed in the previous message format section; command word, status word, and data word. 1553 requires each word to consist of 16 bit of data plus, a sync pattern (3 bit times long), and a one bit parity providing a 20 bit word format.
MIL-STD-1553 (1553) is a standard that describes a one-megabit serial network physical layer (layer one: physical layer – PHY) and message level protocol (layer two: data link layer).
MIL-STD-1553 defines 10 types of transfers as shown in Figure2.0.0-IIIand2.0.0-IV. Each transfer is composed of control words (command and status) and data words and is always initiated by the BC.
This document provides an explanation of each part of MIL-STD-1553 on clause-by- clause basis. Each clause of the Standard is presented for completeness (typed in italics for easy reference) together with appropriate explanation or interpretation wherever necessary.
14 de jun. de 2023 · The MIL-STD-1553 message format is a structured approach to data communication in avionics systems, consisting of command words, status words, and data words. This format ensures reliable and efficient exchange of information, enabling seamless integration of avionics subsystems.
