Z51F0410 Datasheet, PDF (176/184 Pages) Zilog, Inc. – Z8051 Series 8-Bit Microcontrollers

Z51F0410
Product Specification
8.7 Security
The Z51F0410 MCU provides one Lock bit which can be left unprogrammed (“0”) or can be
programmed (“1”) to obtain the additional features listed in Table 8-6. The Lock bit can only be erased
to “0” with the bulk erase command
Table 8-6 Security policy using lock-bits
LOCK
MODE
Flash
USER MODE
DATA
EEPROM
OTP
Flash
ISP/PMODE/BTMODE
DATA
EEPROM
OTP
LOC
KE
LOC
KF
R
W
P
E
B
E
R
W
P
E
B
E
R
W
P
E
B
E
R
W
P
E
B
E
R
W
P
E
B
E
R
W
P
E
B
E
0
0 XX X X OO O O XX X X OO O O OO O O OO O O
0
1 XX X X OO O O XX X X X X X O OO O O OX X O
1
0 XX X X OO O O XX X X O◇◇ ◇ X X X O O◇◇ ◇
1
1 XX X X OO O O XX X X X X X ◇ X X X O OX X ◇
• LOCKF: Lock bit of Flash memory
• LOCKE: Lock bit of data EEPROM
• R: Read
• W: Write
• PE: Page erase
• BE: Bulk Erase
• O: Operation is possible.
• X: Operation is impossible.
• ◇: When LOCKE is programmed, each operation can be done after data EEPROM is erased
with the bulk erase command.
PS029502-0212
PRELIMINARY
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