Microprocessor ST72F324BJ Program Flash Memory Unlocking will take the advantage of focus ion beam to remove the fuse bit embedded and pull embedded firmware out from mcu st72f324bj memory, after a few moment later these extracted heximal can be copied to new st72f324bj for micrcontroller cloning;

The ST7 dual voltage High Density Flash (HDFlash) is a non-volatile memory that can be electrically erased as a single block or by individu- al sectors and programmed on a Byte-by-Byte ba- sis using an external VPP supply.

The HDFlash devices can be programmed and erased off-board (plugged in a programming tool) or on-board using ICP (In-Circuit Programming) or IAP (In-Application Programming). The array matrix organisation allows each sector to be erased and reprogrammed without affecting other sectors.

Read-out protection, when selected, provides a protection against Program Memory content ex- traction and against write access to Flash memo- ry. Even if no protection can be considered as to- tally unbreakable, the feature provides a very high level of protection for a general purpose microcon- troller.

In flash devices, this protection is removed by re- programming the option. In this case, the entire program memory is first automatically erased and the device can be reprogrammed.

Read-out protection selection depends on the de- vice 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.

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