Extract Microcontroller ST72F321BAR9T6 Flash Memory Source Code needs to use focus ion beam to remove its security fuse bit which will refers to pull embedded firmware from st72f321ba flash memory, and then copy flash firmware in the format of heximal to new st72f321ba mcu chip;
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 when breaking st72f321ar ic chip memory protection.
Three Flash programming modes:
Insertion in a programming tool. In this mode, all sectors including option bytes can be pro- grammed or erased.
ICP (In-Circuit Programming). In this mode, all sectors including option bytes can be pro- grammed or erased without removing the de- vice from the application board.
IAP (In-Application Programming) In this mode, all sectors except Sector 0, can be pro- grammed or erased without removing the device from the application board and while the application is running in the process of st72f321bk microprocessor flash memory program decryption.
ICT (In-Circuit Testing) for downloading and executing user application test patterns in RAM
Read-out protection
Register Access Security System (RASS) to prevent accidental programming or erasing