SYSTEM FOR DATA ARBITRATION AND COLLISION DETECTION ON A DATA BUS

摘要

A system for blocking data transmission from a user microprocessor to a data bus utilizing arbitration and collision detection in a data bus interface integrated circuit utilizing a Serial Communication Interface (SCI) port on the user microprocessor. The bus interface integrated circuit includes an arbitration detector, a collision detector and a contention permitting differential transceiver to work with the SCI port to determine between contending messages which message gains access to the communication bus by using the value or priority of the ID byte without losing bus time.