Communications: electrical – Land vehicle alarms or indicators – Of burglary or unauthorized use
Patent
1989-05-18
1990-07-31
Crosland, Donnie L.
Communications: electrical
Land vehicle alarms or indicators
Of burglary or unauthorized use
340687, 340693, 307 102, 455346, 455348, 455351, 364708, 361331, 439297, B60R 2510, H04B 106
Patent
active
049453351
ABSTRACT:
An electronic unit operable in conjunction with a body unit and used by mounting it on an automotive vehicle. The electronic unit includes first and second connectors which produces a coupled-status signal when the electronic unit is coupled to the body unit and a decoupled-status signal when the electronic unit is decoupled from the body unit. A microcomputer is coupled to the first connector and is selectively placed to a start mode when the coupled-status signal is received from the first connector and to a stop mode when the decoupled-status signal is received therefrom. The microcomputer produces clock pulses when it is in the start mode and a stop signal when it is in the stop mode. A timer is coupled to the microcomputer and outputs a reset signal to the microcomputer when the clock pulses are not received for more than a predetermined period of time. The timer further inhibits the reset signal from being outputted when the stop signal is received. In the electronic unit thus arranged, resetting of the microcomputer is ensured should the same be in a runaway condition.
REFERENCES:
patent: 4668873 (1987-05-01), Ohba et al.
patent: 4758817 (1988-07-01), Akiyama
patent: 4805233 (1989-02-01), Robitschko et al.
Endo Fumio
Go Yasunao
Kimura Toshiyuki
Komata Hiroyuki
Nonaka Yoshiya
Crosland Donnie L.
Pioneer Electronic Corporation
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