Serial data bus for intermodule data communications and method of data arbitration and collision detection on a data bus

摘要

A bus interface integrated circuit is presented which utilizes an arbitration detector, a collision detector and a contention permitting differential transceiver to work with a serial communication interface port on a microprocessor 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. A method of 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.