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About "HAL_GetUID()"

Question asked by diverger on Mar 17, 2017

In STM32Cube_FW_F4_V1.15.0, I find a new function: HAL_GetUID(), the brief description of this function is: Return the unique device identifier (UID based on 96 bits). I wonder, how "unique" of this ID, unique in ST's parts, or unique only in STM32 familly? Can it be used as a MAC like? 

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