mc68hc912d60c Freescale Semiconductor, Inc, mc68hc912d60c Datasheet - Page 104

• Manufacturer Part Number: mc68hc912d60c
• Description: Hc12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Flash Memory
7.11 Flash protection bit FPOPEN
Technical Data
104
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 (32-Kbyte and 28-Kbyte) is protected.
1 = The whole Flash array (32-Kbyte and 28-Kbyte) is enabled for
program or erase
Flash Memory
MC68HC912D60A — Rev. 3.1
Freescale Semiconductor