Patent ID: 6016521
Filing Date: 2000-01-18
Classification: H04L

Abstract:
A communication control device comprising:an input terminal connected to communication channels for inputting communication data on said communication channels;an output terminal connected to said communication channels through a wired OR logic or a wired AND logic and for outputting communication data to said communication channels;a central processing unit for receiving said communication data from said input terminal and for generating said communication data to be transferred to said output terminal;an output buffer for storing said communication data written by the central processing unit and for outputting said communication data to said communication channels through said output buffer;an input buffer for storing said communication data on said communication channels through said input terminal and said communication data stored by said input buffer being read by said central processing unit;a readout reload register to which a readout count value is set by said central processing unit;an output reload register to which an output count value is set by said central processing unit; anda timer for reading said count values stored in both said readout reload register and said output reload register alternately every an occurrence of a time out, and for counting each of said readout count value and said output count value,wherein when said time out is happen based on said readout count values, said input data buffer stores said communication data, and when said time out is happen based on said output count values, said output data buffer outputs said communication data.