Electricity: measuring and testing – Plural – automatically sequential tests
Patent
1984-05-14
1988-03-08
Karlsen, Ernest F.
Electricity: measuring and testing
Plural, automatically sequential tests
324158R, 340635, 340653, G01R 3102, G08B 2100
Patent
active
047301562
ABSTRACT:
A self-monitor system for a microprocessor has one or more specific terminals of an IC package. Predetermined dummy loads are applied to each of the specific terminals in response to the onset of power supply, i.e., during cold start. A self-monitor program is provided among the elements of the microprocessor. The self-monitor program is executed during cold start of the microprocessor to check the status of the specific terminals. Signal levels at the specific terminals are thus checked and compared with reference values representative of the signal levels of the specific terminals when the IC package is correctly connected to the printed circuit board. If the signals levels at one or more specific terminals differ from the reference levels, an alarm is produced to announce erroneous connection of the IC package to the printed circuit board.
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patent: 4010456 (1977-03-01), Erni
patent: 4042832 (1977-08-01), Cassarino, Jr. et al.
patent: 4245331 (1981-01-01), Hamano et al.
Neil et al; "Designing a . . . "; Electronics; Mar. 1, 1979; pp. 122-128.
Karlsen Ernest F.
Nissan Motor Company Limited
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