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The purpose of STMicroelectronics STM32F051C6 Locked Chip Breaking is to recover secured flash heximal of microcontroller stm32f051c6, and then copy extracted firmware to new microprocessor stm32f051c6 which can serve as original master MCU;

The ARM® Cortex®-M0 is a generation of ARM 32-bit RISC processors for embedded systems. It has been developed to provide a low-cost platform that meets the needs of MCU implementation, with a reduced pin count and low-power consumption, while delivering outstanding computational performance and an advanced system response to interrupts.

The ARM® Cortex®-M0 processors feature exceptional code-efficiency, delivering the high performance expected from an ARM core, with memory sizes usually associated with 8- and 16-bit devices. The STM32F051xx devices embed ARM core and are compatible with all ARM tools and software which bring great convenience for cracking secured stm8s103k3 mcu flash memory program.

The device has the following features:

• 8 Kbytes of embedded SRAM accessed (read/write) at CPU clock speed with 0 wait states and featuring embedded parity checking with exception generation for fail-critical applications.
  • The non-volatile memory is divided into two arrays:
    • 16 to 64 Kbytes of embedded Flash memory for programs and data
    • Option bytes

The option bytes are used to write-protect the memory (with 4 KB granularity) and/or readout-protect the whole memory in order to unlock stm8s103f3 mcu flash memory with the following options:

• Level 0: no readout protection
  • Level 1: memory readout protection, the Flash memory cannot be read from or written to if either debug features are connected or boot in RAM is selected
    • Level 2: chip readout protection, debug features (Cortex®-M0 serial wire) and

boot in RAM selection disabled