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Question：What is the security (encryption) function of a microcomputer?
The security function is a function built into the firmware of the microcomputer for the purpose of preventing unauthorized reading and reprogramming of the built-in FLASH memory of the microcomputer from a third party.
The mechanism of the security function is that a specific area of the built-in FLASH memory is an encrypted storage area, and when accessing from a serial programmer, the same data as the encrypted data already programmed in the microcomputer is sent to the microcomputer as an ID code. If this does not match, you will not be able to access. For this reason, it is a mechanism that can be accessed only when the programmed contents are known.
The mechanism of the security function is that a specific area of the built-in FLASH memory is an encrypted storage area, and when accessing from a serial programmer, the same data as the encrypted data already programmed in the microcomputer is sent to the microcomputer as an ID code. If this does not match, you will not be able to access. For this reason, it is a mechanism that can be accessed only when the programmed contents are known.
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