Fujitsu MB96300 series Hardware Manual page 910

CHAPTER 35 ROM/FLASH SECURITY
On flash memory devices, the ROM/Flash security can be disabled as follows:
• When starting in internal vector mode (MD[2:0] = 011
security by
- changing the value of the Flash/ROM security byte to a value different to 99
memory location.
- clearing the value of the Flash/ROM security byte by erasing the sector containing this byte.
- clearing the value of the Flash/ROM security byte by erasing the complete flash memory with the
"Chip erase" command.
• When starting in external vector mode (MD[2:0] = 000
application program can disable the Flash security only by
- clearing the value of the Flash/ROM security byte by erasing the complete flash memory with the
"Chip erase" command.
• When starting in serial communication mode (MD[2:0] = 010
- changing the value of the Flash/ROM security byte to a value different to 99
memory location after the Flash security has been unlocked.
- clearing the value of the Flash/ROM security byte by erasing the sector containing this byte after the
Flash security has been unlocked.
- clearing the value of the Flash/ROM security byte by erasing the complete flash memory with the
"Chip erase" command.
• When starting in parallel flash programming mode (MD[2:0] = 111
only by
- clearing the value of the Flash/ROM security byte by erasing the complete flash memory with the
"Chip erase" command.
902
MB96300 Super Series Hardware Manual
), the application program can disable the Flash
B
by writing to this Flash
H
or MD[2:0] = 001 or MD[2:0] = 110
B B
), the Flash security can be disabled by
B
by writing to this Flash
H
) the Flash security can be disabled
B
), the
B