Power up clear system for an electronic calculator or microproce

Details Power up clear system for an electronic calculator or microproce Power up clear system for an electronic calculator or microproce

1976-10-27

1979-03-27

Shaw, Gareth D.

Boots, shoes, and leggings

364900, G06F 1502

Patent

active

041469283

ABSTRACT:
An electronic calculator or microprocessor system is provided with a semiconductor chip having a prechargeable and conditionally dischargeable instruction word memory, a program counter for addressing the instruction word memory, and a power up clear circuit. The power up clear circuit includes a latch circuit having two states, the first state being preferentially entered on when electrical power is first provided to the latch circuit and a second state which is entered at some time thereafter, and a gating circuit for interrupting the addressing of the instruction word memory by the program counter when said latch circuit is in the first state.

REFERENCES:
patent: 3713115 (1973-01-01), Duben
patent: 3736569 (1973-05-01), Bouricius et al.
patent: 3859638 (1975-01-01), Hume, Jr.
patent: 3931507 (1976-01-01), Brantingham
patent: 3934233 (1976-01-01), Fisher et al.
patent: 4005395 (1977-01-01), Fosler, Jr. et al.
patent: 4030073 (1977-06-01), Armstrong, Jr.

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