发明名称 |
Random pattern lock and key fault detection scheme for microprocessor systems |
摘要 |
A microprocessor-based electronic control unit utilizes a random pattern lock and key failure detection scheme to detect failures in the system being controlled or the control unit itself. The microprocessor system is programmed to receive a random data word, to output the same data word, and to perform a variety of tests which result in the generation of a data stream having a particular relationship to the random data word such that the data stream and the random data word bits can be combined to form a predetermined data word that is needed to maintain microprocessor control of the associated electrical system. If the microprocessor fails to generate a data stream which results in the formation of the proper predetermined data word, the control unit output will be locked into a predetermined state.
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申请公布号 |
US4649537(A) |
申请公布日期 |
1987.03.10 |
申请号 |
US19840663526 |
申请日期 |
1984.10.22 |
申请人 |
WESTINGHOUSE ELECTRIC CORP. |
发明人 |
ROSSWURM, MARK A.;KESSLER, LELAND L. |
分类号 |
G06F11/00;(IPC1-7):G06F11/04 |
主分类号 |
G06F11/00 |
代理机构 |
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