MC68HC08AZ32A Datasheet, PDF (48/312 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Memory
EEPRTCT — EEPROM Protection Bit
The EEPRTCT bit is used to enable the security feature in the EEPROM (see 2.7.1.2 EEPROM
Program/Erase Protection).
1 = EEPROM security disabled
0 = EEPROM security enabled
This feature is a write-once feature. Once the protection is enabled it may not be disabled.
EEBP[3:0] — EEPROM Block Protection Bits
These bits prevent blocks of EEPROM array from being programmed or erased. Refer to Table 2-5.
1 = EEPROM array block is protected
0 = EEPROM array block is unprotected
Table 2-5. EEPROM Block Protection Bits
Block Number (EEBPx)
EEBP0
EEBP1
EEBP2
EEBP3
Address Range
$0800–$087F
$0880–$08FF
$0900–$097F
$0980–$09FF
Table 2-6. EEPROM Block Protect and Security Summary
Address Range
$0800–$087F
$0880–$08EF
$08F0–$08FF
$0900–$097F
$0980–$09FF
EEBPx
EEBP0 = 0
EEBP0 = 1
EEBP1 = 0
EEBP1 = 1
EEBP1 = 0
EEBP1 = 1
EEBP2 = 0
EEBP2 = 1
EEBP3 = 0
EEBP3 = 1
EEPRTCT = 1
Byte Programming
Available
Bulk, Block and Byte
Erasing Available
Protected
Byte Programming
Available
Bulk, Block and Byte
Erasing Available
Protected
Byte Programming
Available
Bulk, Block and Byte
Erasing Available
Protected
Byte Programming
Available
Bulk, Block and Byte
Erasing Available
Protected
Byte Programming
Available
Bulk, Block and Byte
Available
Protected
EEPRTCT = 0
Byte Programming
Available
Only Byte Erasing
Available
Protected
Byte Programming
Available
Only Byte Erasing
Available
Protected
Secured
(No Programming or
Erasing)
Byte Programming
Available
Only Byte Erasing
Available
Protected
Byte Programming
Available
Only Byte Erasing
Available
Protected
MC68HC08AZ32A Data Sheet, Rev. 2
48
Freescale Semiconductor