Accession Number : ADD014977

Title :   Communications Interface and System for Radiation Recovery of a Microprocessor Portion Thereof.

Descriptive Note : Patent filed 27 May 82, patented 4 Jun 91,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Rosario, Jesus A

Report Date : 04 Jun 1991

Pagination or Media Count : 6

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 communication 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.

Descriptors :   COMMUNICATION AND RADIO SYSTEMS, COMMUNICATIONS NETWORKS, CONTROL, GAMMA RAYS, INTERFACES, IRRADIATION, MEMORY DEVICES, MICROPROCESSORS, OPERATION, RADIATION, READING, RECOVERY, SIGNALS, TRANSIENTS, WRITING

Subject Categories : Computer Systems
      Nuclear Radiation Shield, Protection & Safety

Distribution Statement : APPROVED FOR PUBLIC RELEASE