MC68HC12 MOTOROLA [Motorola, Inc], MC68HC12 Datasheet - Page 122

• Manufacturer Part Number: MC68HC12
• Description: The MC68HC912DT128A microcontroller unit (MCU) is a 16-bit device composed of standard on-chip peripherals including a 16-bit central processing unit
• Manufacturer: MOTOROLA [Motorola, Inc]

Flash Memory
8.11 Flash protection bit FPOPEN
Technical Data
122
CAUTION:
The FPOPEN bit is located in EEMCR – EEPROM Module Configuration
Register, bit 4.
FPOPEN – Opens the Flash array for program or erase
Programming the NVM FPOPEN bit in the SHADOW word ($_FC0, bit
4) means that the FPOPEN bit in the EEMCR register will always be ’0’
in normal modes. The flash array can no longer be modified in normal
modes.
FPOPEN can be read at anytime.
FPOPEN can be written only to ’0’ for protection but not to ’1’ for un-
protect in normal mode.
FPOPEN can be written ’0’ and ’1’ in special mode only.
FPOPEN is loaded at reset from EEPROM SHADOW word bit 4.
When FPOPEN is cleared to ’0’, the Flash array cannot be
reprogrammed in normal modes.
0 = The whole Flash array is protected.
1 = The whole Flash array is enabled for program or erase
Flash Memory
MC68HC912DT128A — Rev 4.0
MOTOROLA