MC68HC12 Datasheet, PDF (117/478 Pages) Motorola, Inc – The MC68HC912DT128A microcontroller unit (MCU) is a 16-bit device composed of standard on-chip peripherals including a 16-bit central processing unit

Flash Memory
Flash EEPROM Registers
fixed 32K Flash EEPROM array 11FEE32K. In expanded modes, the
Flash EEPROM arrays are turned off. See Operating Modes.
8.6 Flash EEPROM Registers
Each 32K byte Flash EEPROM module has a set of registers. The
register space $00F4-$00F7 is in a register space window of four pages.
Each register page of four bytes maps the register space for each Flash
module and each page is selected by the PPAGE register. See
Resource Mapping
FEELCK — Flash EEPROM Lock Control Register
$00F4
Bit 7
6
5
4
3
2
1
Bit 0
0
0
0
0
0
0
0
LOCK
RESET:
0
0
0
0
0
0
0
0
In normal modes the LOCK bit can only be written once after reset.
LOCK — Lock Register Bit
0 = Enable write to FEEMCR register
1 = Disable write to FEEMCR register
FEEMCR — Flash EEPROM Module Configuration Register
$00F5
Bit 7
6
5
4
3
2
1
Bit 0
0
0
0
0
0
0
0
BOOTP
RESET:
0
0
0
0
0
0
0
1
This register controls the operation of the Flash EEPROM array.
BOOTP cannot be changed when the LOCK control bit in the
FEELCK register is set or if HVEN or PGM or ERAS in the FEECTL
register is set.
MC68HC912DT128A — Rev 4.0
MOTOROLA
Flash Memory
Technical Data
117