Non-volatile memory with partition write-protection and guard position scrambling processing functions and write-operation method thereof
A non-volatile, bit-protected technology, used in static memory, read-only memory, digital memory information, etc., can solve the problems of inconvenient integration, unprotected data, and vulnerable to attacks, and achieve easy integration and improve anti-illegal tampering. Or malicious attack ability, avoid the effect of modifying the protection bit information
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[0047] In the following, the flow of writing operations in different areas of the present invention will be further described in detail in conjunction with the embodiments.
[0048] Figure 8 As a schematic diagram of a more specific embodiment of the circuit design provided by the present invention, the overall memory array is divided into three parts: OTP area, MTP area ( 810 ) and protection bit area 820 . In this embodiment, the overall MTP is divided into three blocks as an example, but it can also be divided into any blocks in actual design. The OTP area write protection control circuit 830 controls the OTP area to only perform one write operation under normal conditions, and locks it after writing. The MTP area is divided into different blocks, each block has a corresponding protection bit in the protection bit area, and the protection bit information stored in the protection bit area is stored in the block status register in the MTP area write protection control circu...
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