参数资料
型号: ST7FLU05MAE
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO8
封装: 0.150 INCH, LEAD FREE, PLASTIC, SOP-8
文件页数: 39/124页
文件大小: 2186K
代理商: ST7FLU05MAE
Obsolete
Product(s)
- Obsolete
Product(s)
ST7LUS5, ST7LU05, ST7LU09
Flash program memory
21/124
4.5
Memory protection
There are two different types of memory protection: readout protection and write/erase
protection, either of which can be applied individually.
4.5.1
Readout protection
Readout 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. Program memory is protected.
In Flash devices, this protection is removed by reprogramming the option. In this case,
program memory is automatically erased, and the device can be reprogrammed.
Readout protection selection depends on the device type:
In Flash devices it is enabled and removed through the FMP_R bit in the option byte.
In ROM devices it is enabled by mask option specified in the Option List.
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.
Warning:
Once set, write/erase protection can never be removed. A
write-protected Flash device is no longer reprogrammable.
Write/erase protection is enabled through the FMP_W bit in the option byte.
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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