
19. Memory programming
MC97F6108A User’s manual
218
19.6
Security
MC97F6108A provides Lock bits which can be left un-
programmed (“0”) or can be programmed (“1”) to
obtain the additional features listed in Table 37.
The Lock bit can only be eras
ed to “0” with the bulk erase comm
and and a value of more than 0x80 at
FETCR.
Table 37. Security Policy using Lock Bits
Lock
modE
User mode
ISP mode
Flash
OTP
Flash
OTP
LOCKF
R
W
PE BE R
W
PE BE R
W
PE BE R
W
PE BE
0
O
O
O
X
X
X
X
X
O
O
O
O
O
O
O
O
1
O
O
O
X
X
X
X
X
X
X
X
O
O
X
X
O
NOTES
:
1.
LOCKF: Lock bit of Flash memory
2.
R: Read
3.
W: Write
4.
PE: Page erase
5.
BE: Bulk Erase
6.
O: Operation is possible.
7.
X: Operation is impossible.