1553 RT mechanizations for data sample consistency and multi-message transfers

System requirements and Interface Control Drawings (ICDs) make a variety of demands for MIL-STD-1553 remote terminals (RTs). Among these requirements are the need to ensure data integrity and sample data consistency, the need to perform bulk data transfers, and the need to offload the operation of the host CPU to the greatest degree possible. This paper provides a discussion of the hardware and software techniques for achieving these objectives. Three different schemes for RT subaddress memory management are presented: single message, circular buffer, and double buffered. For receive and transmit messages, these include fully synchronous single message transfers, asynchronous single message transfers, and multimessage transfers. Finally, three issues relating to MIL-STD-1553 Notice 2 are discussed: data wraparound, broadcast separation, and busy.