A safety protection circuit

Abstract

The invention relates to a safety protection circuit which comprises a PAD corresponding to a signal input end, an ESD protection diode, a first one-out-of-two analog switch, a second one-out-of-two analog switch and a data storage module. The purpose that external interaction data, addressing and control signals cannot enter and exit a storage matrix is achieved by physically destroying the structure of an input circuit of the control signals such as data, addresses and read-write enable of a nonvolatile storage, and therefore information safety protection is achieved. According to the safety protection circuit, not only can accessing of the exterior to a storage array of the nonvolatile storage be blocked, but also destruction to the data in the storage cannot be recovered, the needed destroying time is short, and the power consumption is low; in addition, the defects that an existing nonvolatile storage information safety protection scheme is not thorough in data destroying and complex in printed circuit board wire are overcome, and the advantages that no additional printed circuit board wire is added, and the data destruction time consumption is unrelated to the data storage capacity of the storage are achieved.

Description

technical field [0001] The invention relates to the field of electricity, in particular to a safety protection circuit. Background technique [0002] It is necessary to carry out special protection for non-volatile memory carriers whose storage content involves highly sensitive information such as national defense and commerce. Once the storage content is leaked, it will cause great harm to the interests of the people and enterprises. Necessary When it is necessary to destroy the internal data of the memory under certain circumstances, in order to prevent the information stored on it from leaking and causing heavy losses, there are various schemes for destroying the data. [0003] At present, known non-volatile memory information security protection schemes include on-chip erasing or formatting data, introducing high voltage and high current on the PCB board to burn the memory chip, and the like. The on-chip book erasing or formatting solutions are generally only applicable...

AI Technical Summary

Problems solved by technology

For on-chip book erasing or formatting solutions, it is generally only applicable to FLASH type memory chips, and there are disadvantages that when the capacity of the memory chip is large, the erasing time is long, and the data may be restored.

For the method of burning memory chips by introducing high voltage and high current on the PCB board, the power consumption is large during destruction, and for devices with multiple memory chips such as SSD disks, it takes a long time to destroy the above chips one by one. And the wiring on the printed circuit board is complicated

Obviously, solutions with a long destruction time are not suitable for information security protection applications in emergency situations

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