Data communication bus structure

Details Data communication bus structure Data communication bus structure

H - Electricity

04

Q

354/232

H04Q 3/58 (2006.01) G06F 1/00 (2006.01) G06F 13/42 (2006.01) H04Q 1/30 (2006.01)

Patent

CA 1092715

DATA COMMUNICATION BUS STRUCTURE Abstract or the Disclosure A data communication bus structure where all module-to- module control information is grouped into two sets of lines, defined as sub-buses, wherein signal contents of the sub- buses change only at well-defined times, under the control of two other lines which themselves simply govern the trans- fer of control information relative to the communication. The bus structure is symmetrical with one type of each line driven by each of the two modules involved in the communica- tion. Arbitrary standard error detecting/correcting encodings may be used on the bus to overcome possible bus failures with no change to the basic bus communications protocol. An independent bus monitor observes all communications over the bus, observes when an improper signalling exchange takes place, and isolates the module most responsible for the fault. Also, there is provided a simple and standard pro- grammable interface unit which can be used to generate the appropriate control information and signalling protocol for a module that is to be tied to the bus.

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