Excavating
Patent
1982-05-27
1991-06-04
Cangialosi, Salvatore
Excavating
371 7, 376245, G06F 1100
Patent
active
050220276
ABSTRACT:
A communications interface and system is configured to allow circumvention recovery of control after radiation) of a microprocessor portion thereof. The communications interface portion, including a hard memory interface device serves as a communications link to the microprocessor. The system is configured so that a transient upset from prompt gamma radiation is detected and a circuit freeze of the stored information in the system is carried out until the transient subsides. The system then restores the microprocessor to the preirradiation condition and resumes operation. Accordingly, the hard memory interface device of the communications interface, controls a READ operation and CLEAR and WRITE operations in addition to generating signals to control the "handshaking" between the hard memory of the communications interface and the aforementioned microprocessor.
REFERENCES:
patent: 3725861 (1973-04-01), Hancock
patent: 3795800 (1974-03-01), Nimmo
patent: 4031374 (1977-06-01), Groudan et al.
patent: 4044337 (1977-08-01), Hicks et al.
patent: 4059762 (1977-11-01), Horrocks
patent: 4151484 (1979-04-01), Robe
patent: 4351050 (1982-09-01), Higashiyama
Cangialosi Salvatore
The United States of America as represented by the Secretary of
Walden Kenneth E.
Wynn John G.
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