ST7FLU09B6 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST7FLU09B6

8-bit low cost, low pin-count MCU for automotive, with single voltage Flash memory, ADC, timers

STMicroelectronics 

ST7LUS5, ST7LU05, ST7LU09

Flash program memory

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,

lete Prodduucctt((ss)) 4.5.2

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.

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.

bso Pro Warning: Once set, write/erase protection can never be removed. A

- O te write-protected Flash device is no longer reprogrammable.

ct(s) bsole Write/erase protection is enabled through the FMP_W bit in the option byte.

du - O Related documentation

Pro t(s) For details on Flash programming and ICC protocol, refer to the ST7 Flash Programming

OObbssoolleettee Produc Reference Manual and to the ST7 ICC Protocol Reference Manual.

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