Patent ID: 7178069
Filing Date: 2007-02-13
Classification: G06F,H04L

Abstract:
1. An electronic control unit comprising: a first control circuit section containing a program memory, an operation processing RAM memory, a microprocessor, and a first series-parallel converter; and a second control circuit section containing a communication control circuit section at least for carrying out communication of monitoring and control signals, a data memory, and a second series-parallel converter, wherein serial communication of monitoring and control signals is carried out mutually between said first and second control circuit sections via said first and second series-parallel converters, wherein said first control circuit section includes regular transmission means and irregular transmission means, and said second control circuit section includes regular report means and an unprocessed data table, wherein said regular transmission means acts as write setting means that regularly transmits control output data or constant set data from said first control circuit section with respect to said second control circuit section, and executes a retransmission processing from the first control circuit section to the second control circuit section if any communication error in a confirmation reply of whether or not the second control circuit section has received said regular transmission data, is present, wherein said regular report means acts as one-way input readout means which regularly reports monitoring input data and status information from said second control circuit section to said first control circuit section, whereby no confirmation reply of whether or not the first control circuit section has received said regular report data is carried out, wherein said irregular transmission means operates as transmission means that is applicable when any error is present in a report communication provided by said regular report means, and is applied if a readout request for monitoring input data of a specified address from said first control circuit section to said second control circuit section is required, and if a readout request for reading out and checking a write save data having been written and set by said regular transmission means is required; wherein said irregular transmission means further operates as readout request means that makes a readout request from the first control circuit section to the second control circuit section if any communication error in a report reply of a monitoring input data of a specified address or a write save data is present, said report reply being carried out as a confirmation reply related said second control circuit section having received said irregular transmission data, wherein said unprocessed data table operates as a receiving-side command memory arranged so as to sequentially save command data for executing a confirmation reply when said second control circuit section receives any transmission data from said first control circuit section, and to sequentially erase said saved data when said second control circuit section transmits the confirmation reply data to said first control circuit section; and the transmission of a regular report data is carried out while preventing upstream communication jam-up from said second control circuit section to said first control circuit section with said unprocessed data table.