Reset circuit for microcomputer

Details Reset circuit for microcomputer Reset circuit for microcomputer

1991-04-24

1992-08-18

Hudspeth, David

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307443, H03K 1720

Patent

active

051401789

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.

REFERENCES:
patent: 4433390 (1984-02-01), Carp et al.
patent: 4533837 (1985-08-01), Tanaka et al.
patent: 4572966 (1986-02-01), Hepworth
patent: 4886983 (1989-12-01), Taka
patent: 4940909 (1990-07-01), Mulder et al.
patent: 4942311 (1990-07-01), Harada

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