System and method for resetting a microprocessor system

Details System and method for resetting a microprocessor system System and method for resetting a microprocessor system

1992-03-02

1994-03-22

Heckler, Thomas M.

Boots, shoes, and leggings

364DIG1, 3642803, G06F 124

Patent

active

052972879

ABSTRACT:
The present invention provides a reset circuit with two different threshold input voltages. The reset circuit of the present invention is located within a processor, and is designed to control the reset functions of both the processor and the chips located peripheral to the processor. The reset circuit includes a first buffer with a first threshold voltage level. The input of the first buffer is connected to a reset signal and the output of the first buffer is connected to control the reset function of at least one chip that is peripheral to the processor. A second buffer is provided with a second threshold voltage level that is higher than the first threshold voltage level. The input of the second buffer is connected to the reset signal and the output of the second buffer is connected to control the reset function of the processor. The reset circuit guarantees that the processor is reset after the peripheral chips subsequent to power up.

REFERENCES:
patent: 4378588 (1983-03-01), Katzman et al.
patent: 4403288 (1983-09-01), Christian et al.
patent: 4799140 (1989-01-01), Dietz et al.
Patent Abstracts of Japan, Publication No. JP63067004, Published Mar. 25, 1988, Abstract vol. 12, No. 291, Publshed Aug. 9, 1988.
Patent Abstracts of Japan, Publication No. JP1177830, Published Jul. 14, 1989, Abstract vol. 13, No. 459, Published Oct. 17, 1989.

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