Reset circuit for microcomputer
US5140178A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 24, 1991 |
| Grant date | Aug 18, 1992 |
| Priority date | — |
| Expiry date | Apr 24, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2017/226
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In an electric apparatus which accommodates a built-in microcomputer which is supplied with power at all times regardless of a state of switching of a main power switch for an electric apparatus, a reset circuit for the microcomputer wherein a key-on monitor monitors a duration of keying of a reset key and derives a detected signal therefrom at the time when the key is depressed continuously over a predetermined threshold time, and a reset signal generator generates a reset signal based on a detected output of the key-on monitor and resets the microcomputer for initialization. According to this reset circuit, the built-in microcomputer can readily be reset without disconnecting the main power supply, that is different from the conventional apparatus wherein the reset is performed by detaching the attachment plug from the receptacle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.