MC68HC908AS32A Datasheet, PDF (47/280 Pages) Freescale Semiconductor, Inc – Microcontrollers

Electrically Erasable Programmable Read-Only Memory (EEPROM)
EEPRTCT — EEPROM Protection Bit
The EEPRTCT bit is used to enable the security feature in the EEPROM (see 2.8.1.3 EEPROM
Program/Erase Protection).
1 = EEPROM security disabled
0 = EEPROM security enabled
NOTE
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.
1 = EEPROM array block is protected
0 = EEPROM array block is unprotected
Block Number (EEBPx)
EEBP0
EEBP1
EEBP2
EEBP3
Address Range
$0800–$087F
$0880–$08FF
$0900–$097F
$0980–$09FF
Table 2-5. 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
erasing 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
MC68HC908AS32A Data Sheet, Rev. 2.0
Freescale Semiconductor
47