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Copy MC68HC05H12 Eeprom Memory Program and flash memory program can help the cracker to restore the firmware out from the original MC68HC05H12 MCU which is same as the original version:

The EEPROM array configuration register configures EEPROM security and EEPROM block protection. This read-only register is loaded with the contents of the EEPROM non- volatile register (EENVR) after a reset.

EEPROM Array Configuration Register (EEACR)

The EEPRTCT bit is used to enable the security feature in the EEPROM (see above EEPROM Security Options).

1 = EEPROM security disabled 0 = EEPROM security enabled

EEBP[3:0] — EEPROM Block Protection Bits

These bits prevent blocks of EEPROM array from being programmed or erased.

Copy MC68HC05H12 Eeprom Memory Program

1 = EEPROM array block is protected

0 = EEPROM array block is unprotected

The contents of this register is loaded into the EEPROM array configuration register (EEACR) after a reset. This register is erased and programmed in the same way as an EEPROM byte when Retrieve MCU IC Freescale MC9S12XDG128.

The contents of this register is loaded into the EEPROM array configuration register (EEACR) after a reset. This register is erased and programmed in the same way as an EEPROM byte.

EEPROM Non-Volatile Register (EENVR)