Method for protecting data of memorizer

Abstract

The invention relates to a method for protecting data of a memorizer, which comprises the following steps of: dividing the memorizer into six regions which are respectively to be a serial number memory region, a configuration parameter region, an arithmetic execute-only region, a procedure region, a protected data region and an open data region; setting different authority check codes to each region except the open data region; and performing write operation after the authority check codes are correctly matched, wherein the data in the memorizer has to firstly pass through a protection unit of the memorizer before the write operation, and the authority check codes controls the protection unit of the memorizer whether to start operation authority to interrelated regions of the memorizer. The method has the benefits effects as follows: a set of rigorous data protection mechanism is built between a processor CPU and the memorizer to lead the data of the memorizer to be absolutely safe, be capable of preventing the date of the on-chip memorizer from being read, and effectively protect corresponding circuits when writing and erasing flash, etc. An upper machine controls the protection unit of the memorizer by inputting the authority check codes through an external communication interface to protect imbedded FLASH data.

Description

technical field [0001] The invention relates to the field of embedded SOC integrated circuit design, in particular to a memory data protection method. Background technique [0002] With the development of embedded technology and the popularity of 32-bit processor CPU core, its computing power is getting higher and higher, and a large number of software and core algorithms need to run in the CPU. Algorithms running on 32-bit CPUs are mostly general-purpose C program programming, which is highly portable. If leaked, it will cause serious consequences. When designing an SOC chip, it is necessary to have a complete set of mechanisms to protect software algorithms and data from being accidentally deleted or leaked. At the same time, it needs to be encrypted without affecting the original functions. This set of technology for memory data protection is referred to as MPU (Memory Protect Unit) technology. [0003] Existing SOC designs are rarely capable of protecting memory data, ...

AI Technical Summary

Problems solved by technology

[0004] For the incomplete problem of memory data protection in the above-mentioned SOC chip, the present invention proposes a kind of method of memory data protection, logic circuit is arranged on the SOC chip hardware circuit of applying this method and can prevent on-chip memory data from being read, when carrying out Flash writing, There are corresponding circuits for protection when erasing and other operations

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