Pioneer Electronic Corporation

Sadami Hattori

Yoshiharu Ueki

Yasunao Go

Minoru Motohashi

Kozo Nozawa

A power supply circuitry for a microcomputer system made up of a control unit including a microprocessor and a peripheral circuit, is provided with a delay switch circuit (55) for controlling the operation of the second regulator means (41) which provides a power current to the peripheral circuit of the microcomputer system. The delay switch circuit is responsive to a reset signal produced by a reset signal generating means connected to a first regulator means (34) for the control unit, and generates a signal for activating the second regulator means shortly after the extinction of the reset signal so that the operation of the peripheral circuit is prevented during a period of a reset operation of the microprocessor.

Growing community of inventors

Kawagoe, Japan

Sadami Hattori