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Unlock STM8S103F3U3 Microprocessor Secured Memory and readout embedded heximal from program flash and data eeprom of mcu stm8s103f3u3, the fuse bit can be located and disabled by reverse engineering stm8s103f3 microcontroller’s structure.

The watchdog system is based on two independent timers providing maximum security to the applications.

Activation of the watchdog timers is controlled by option bytes or by software. Once activated, the watchdogs cannot be disabled by the user program without performing a reset which is an important step for unlocking mcu stm8s003f3 secured memory.

The window watchdog is used to detect the occurrence of a software fault, usually generated by external interferences or by unexpected logical conditions, which cause the application program to abandon its normal sequence.

The window function can be used to trim the watchdog behavior to match the application perfectly.

The application software must refresh the counter before time-out and during a limited time window to perform stm8s105k4 mcu flash code cloning.

A reset is generated in two situations:

1. Timeout: At 16 MHz CPU clock the time-out period can be adjusted between 75 µs up to 64 ms.
2. Refresh out of window: The downcounter is refreshed before its value is lower than the one stored in the window register.