Electronic controller having excellent control program and contr

Details Electronic controller having excellent control program and contr Electronic controller having excellent control program and contr

1996-11-22

1998-10-20

Cuchlinski, Jr., William A.

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

701 1, 701 99, 701102, 123480, 123486, G06F 1900, G06G 770

Patent

active

058262113

ABSTRACT:
An ECU is equipped with multiple microprocessors. Each microprocessor has an erasable ROM. A communication port of a first microprocessor is connected via an external communication line to a memory overwriter while another communication port of the same microprocessor and a communication port of a second microprocessor are connected to each other via an internal communication line. Before overwriting the contents of the ROM, each microprocessor stores its own identification number whose value is obtained by incrementing the identification number received from the memory overwriter and sending the incremented identification number to the next stage microprocessor. In this way, there is no need to store the identification numbers beforehand in nonerasable memory regions inside the microprocessors.

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U.S. application No. 08/686699, Hayashi et al., filed Jul. 1996.

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