Multi-mode redundancy and data maintenance system for space computer guide area

Abstract

The invention discloses a multi-mode redundancy and data maintenance system for a space computer guide area. A watchdog module is sequentially connected with the working mode switching module and theEEPROM programming control module through the cold and hot start mark module to form a multimode redundancy and data maintenance system of a guide area. The multimode redundancy and data maintenance system is connected with two completely independent EEPROMs through a control bus. A cold and hot start flag bit, a guide area chip selection signal and an address line of a space computer are used forcarrying out logic combination, two chip selection signals are generated through a decoder, the two chip selection signals generated by the decoder are connected with chip selections of two EEPROMs respectively, and gating of the EEPROMs and read-write operation are achieved. On-orbit reconfigurability and data maintenance of a space computer guide area are achieved, and on one hand, the problemthat a traditional computer can only conduct on-orbit maintenance in a limited RAM area and cannot reconstruct and maintain a guide area program is solved. And on the other hand, the problem of data loss of a traditional computer after maintenance after system power failure is solved.

Description

technical field [0001] The invention belongs to the field of space computer technology, and in particular relates to a multi-mode redundancy and data maintenance system facing the space computer guide area. Background technique [0002] In my country's satellite platform system, most space computers are designed with a program guide area for storing the computer's boot program. The boot program is responsible for completing two tasks. The first aspect is to complete the configuration and initialization of various registers of the processor, to ensure that the processor can start and run normally, and to realize the initialization of various I / O devices; Communication and control of critical parts, and attempted repair of relevant areas in normal patterns. [0003] In the existing design, the space computer boot area program utilizes "one-time programmable read-only memory (PROM)" to store the boot program. There are two disadvantages in using PROM to store programs: [00...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a multi-mode redundancy and data maintenance system for the boot area of ​​a space computer to solve the problem of long procurement cycle and uncontrolled quality of program storage devices in the boot area, aiming at the deficiencies in the above-mentioned prior art. problems; and disadvantages such as non-reconfigurable and unmaintainable boot area programs

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