MCU chip information protection method and device based on several partitions

Abstract

The invention provides an MCU chip information protection method and device based on several partitions, the MCU chip includes an instruction bus, a data bus, a flash memory controller and a flash memory user area; the method includes: determining that the instruction bus is accessing When the flash memory user area is accessed, the previous partition accessed; enter the previous partition working state corresponding to the previous partition; once again determine the current partition accessed by the instruction bus when accessing the flash user area; if If the previous partition is inconsistent with the current partition, enter the transition state; determine whether the time in the transition state reaches the preset waiting time; if so, enter the partition working state corresponding to the current partition. The present invention is used to protect the program from being stolen by the client, and at the same time protect the cooperatively developing program companies from stealing each other's program.

Description

technical field [0001] The invention relates to the technical field of electronic circuits, in particular to an MCU chip information protection method based on several partitions and an MCU chip information protection device based on several partitions. Background technique [0002] With the continuous improvement of integrated circuit technology, MCU (Micro Control Unit, Micro Control Unit) chips are more and more widely used, ranging from small children's toys to large construction machinery, all need to use MCU chips. The MCU chip usually includes a CPU (Central Processing Unit, central processing unit), a flash memory (Flash Memory), an SRAM (Static Random Access Memory, static random access memory) and various peripheral devices. When the MCU chip is powered off, the content of the flash memory will not be lost, but the content of the SRAM will be lost. The flash memory is usually divided into two independent areas: one is the flash user area, which is used to store us...

AI Technical Summary

Problems solved by technology

In terms of information protection schemes, MCU chip products currently on the market only protect the contents of the flash memory user area as a whole, which cannot meet the needs of multiple companies to jointly develop programs

Because it can only protect the content of the flash user area from being stolen by customers, but it cannot prevent companies that jointly develop programs from stealing each other's programs

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