Electronic unit operable in conjunction with body unit
US4945335A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 18, 1989 |
| Grant date | Jul 31, 1990 |
| Priority date | — |
| Expiry date | May 18, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/149
- WIPO fieldControl
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.