Secured Microcntroller STM32F042C6 Flash Memory breaking can help engineer to extract embedded heximal from stm32f042c6 locked mcu after cracking stm32f042c6 microprocessor security fuse bit;

The device has integrated power-on reset (POR) and power-down reset (PDR) circuits. They are always active, and ensure proper operation above a threshold of 2 V.

The device remains in reset mode when the monitored supply voltage is below a specified threshold, VPOR/PDR, without the need for an external reset circuit.

• The POR monitors only the VDD supply voltage. During the startup phase it is required that VDDA should arrive first in the process of breaking stm32f042k6 microcontroller flash memory locked bits and be greater than or equal to VDD.
  • The PDR monitors both the VDD and VDDA supply voltages, however the VDDA power supply supervisor can be disabled (by programming a dedicated Option bit) to reduce the power consumption if the application design ensures that VDDA is higher than or equal to VDD.

The device features an embedded programmable voltage detector (PVD) that monitors the VDD power supply and compares it to the VPVD threshold. An interrupt can be generated when VDD drops below the VPVD threshold and/or when VDD is higher than the VPVD threshold.

The interrupt service routine can then generate a warning message and/or put the MCU into a safe state. The PVD is enabled by software.