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參數(shù)資料
| 型號： | ST7PLU09MCTRE |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO8 |
| 封裝： | 0.150 INCH, ROHS COMPLIANT, PLASTIC, SOP-8 |
| 文件頁數(shù)： | 39/124頁 |
| 文件大?。?/td> | 1995K |
| 代理商： | ST7PLU09MCTRE |
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ST7LUS5, ST7LU05, ST7LU09
Flash program memory
21/124
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.
4.6
Register description
4.6.1
Flash control/status register (FCSR)
1st RASS Key: 0101 0110 (56h)
2nd RASS Key: 1010 1110 (AEh)
Note:
This register is reserved for programming using ICP, IAP or other programming methods. It
controls the XFlash programming and erasing operations.
When an EPB or another programming tool is used (in socket or ICP mode), the RASS keys
are sent automatically.
FCSR
Reset value: 000 0000 (00h)
7
654
32
10
0
000
0
OPT
LAT
PGM
R/W
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| ST90135M5T6 | 16-BIT, MROM, 24 MHz, MICROCONTROLLER, PQFP80 |
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