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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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ST7FOXK2 数据表(PDF) 27 Page - STMicroelectronics |
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ST7FOXK2 数据表(HTML) 27 Page - STMicroelectronics |
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27 / 226 page  ST7FOXF1, ST7FOXK1, ST7FOXK2 Flash programmable memory 27/226 4.5 Memory protection There are two different types of memory protection: Read-Out Protection and Write/Erase Protection which can be applied individually. 4.5.1 Read-out protection Read-Out Protection, when selected provides a protection against program memory content extraction and against write access to Flash memory. Even if no protection can be considered as totally unbreakable, the feature provides a very high level of protection for a general purpose microcontroller. ● In Flash devices, this protection is removed by reprogramming the option. In this case, the program memory is automatically erased and the device can be reprogrammed. The read-out protection is enabled and removed through the FMP_R bit in the option byte. 4.5.2 Flash write/erase protection Write/Erase Protection, when set, makes it impossible to both overwrite and erase program memory. Its purpose is to provide advanced security to applications and prevent any change being made to the memory content. Write/Erase Protection is enabled through the FMP_W bit in the option byte. Caution: Once set, Write/Erase Protection can never be removed. A write-protected Flash device is no longer reprogrammable. 4.6 Related documentation For details on Flash programming and ICC protocol, refer to the ST7 Flash Programming Reference Manual and to the ST7 ICC Protocol Reference Manual. |
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