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Each one of the 8 bits MCU will has the own system to protect the clock sequence not able to be manipulated by external source, without knowing this, there is no way to Clone 8 bit ST7FLITES5Y0M6 MCU Flash Memory, clock system security is comonly seen in most of MCU, especially the STM series, The Clock Security System (CSS) protects the ST7 against main clock problems similar to MCU ST7FMC1K2B6 Program cloning. To allow the integration of the security features in the applica- tions, it is based on a PLL which can provide a backup clock. The PLL can be enabled or disabled by option byte or by software. It requires an 8-MHz input clock and provides a 16-MHz output clock.

Clone 8 bit ST7FLITES5Y0M6 MCU Flash Memory

The safe oscillator of the CSS block is made of a PLL. If the clock signal disappears (due to a broken or disconnected resonator…) the PLL continues to provide a lower frequency, which allows the ST7 to perform some rescue operations. Note: The clock signal must be present at start-up. Otherwise, the ST7MC will not start and will be maintained in RESET conditions.

The automatic safe oscillator selection is notified by hardware setting the CSSD bit of the SICSR register. An interrupt can be generated if the CS- SIE bit has been previously set. These two bits are described in the SICSR register description after Clone 8 bit ST7FLITES5Y0M6 MCU Flash Memory.