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ARM STM32F031G4 Microprocessor Flash Cracking will use focus ion beam technique to remove the protection over its microcontroller flash memory, and then extract embedded heximal or binary firmware from its MCU flash;

At startup, the boot pin and boot selector option bit are used to select one of the three boot options:

• boot from User Flash memory
  • boot from System Memory
  • boot from embedded SRAM

The boot loader is located in System Memory. It is used to reprogram the Flash memory by using USART on pins PA14/PA15 or PA9/PA10.

The CRC (cyclic redundancy check) calculation unit is used to get a CRC code from a 32-bit data word and a CRC-32 (Ethernet) polynomial to clone stm32f031c4 flash firmware. Among other applications, CRC-based techniques are used to verify data transmission or storage integrity.

In the scope of the EN/IEC 60335-1 standard, they offer a means of verifying the Flash memory integrity. The CRC calculation unit helps compute a signature of the software during runtime and replicate stm32f031c6 arm microprocessor flash program to be compared with a reference signature generated at link- time and stored at a given memory location.