MULTIPLEX COMMUNICATION INTERFACE CIRCUIT AND METHOD

摘要

PURPOSE: A multiplex communication interface circuit is provided to receive frame messages connected to one or more nodes controlled individual by a microcontroller along a common transmission line of a multiplex communication system. CONSTITUTION: Nodes receive the type and target bytes transmitted from a originating node in a multiplex communication system and, responsive thereto, generate a first interrupt signal to a microcontroller at the node. An interface circuit commands the microcontroller, responsive to receiving the first interrupt signal, for qualifying the frame message by retrieving and matching one or more of the type and target bytes with corresponding bytes stored in programmable memory within the microcontroller, and responsive thereto generating a qualified signal