Read ARM MCU Firmware out from ARM microprocessor embedded memory, cut off the security fuse bit connected from processor to memory by Microcontroller cracking technique will help, and copy the extracted code to new MCU;

Read ARM MCU Firmware out from ARM microprocessor embedded memory

Fortunately, the extraction from the erased memory technique can only be applied to a very limited number of chips with EEPROM/Flash memory. First, some microcontrollers such as in the Texas Instruments MSP430 family of microcontrollers have an internally stabilized supply voltage for the on-chip memory. Changing the power supply from 1.8 V to 3.6 V does not affect memory read operation from partially erased cells.

Second, most microcontrollers fully reset and discharge the memory control circuit if the chip is reset or the programming mode is re-entered. But still, if the memory contents do not disappear completely, this represents a very serious threat to any security based on an assumption that the information is irrecoverable after one memory erase cycle.

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