
Memory
Electrically Erasable Programmable ROM (EEPROM)
MC68HC08AS32A — Rev. 1
Data Sheet
MOTOROLA
Memory
49
2.5.2.3 EEPROM Non-Volatile Register
The contents of this register is loaded into the EEPROM array configuration
register (EEACR) after a reset.
This register is erased and programmed in the same way as an EEPROM byte.
See
2.5.2.1 EEPROM Control Register
for individual bit descriptions.
NOTE:
The EENVR will leave the factory programmed with $F0 such that the full array is
available and unprotected.
Table 2-5. EEPROM Block Protect and Security Summary
Address
Range
EEBPx
EEPRTCT = 1
EEPRTCT = 0
$0800—$087F
EEBP0 = 0
Byte programming available
Bulk, block, and byte
erasing available
Byte programming available
Only byte erasing available
EEBP0 = 1
Protected
Protected
$0880–$08EF
EEBP1 = 0
Byte programming available
Bulk, block, and byte erasing
available
Byte programming available
Only byte erasing available
EEBP1 = 1
Protected
Protected
$08F0—$08FF
EEBP1 = 0
Byte programming available
Bulk, block, and byte erasing
available
Secured
(no programming or erasing)
EEBP1 = 1
Protected
$0900–$097F
EEBP2 = 0
Byte programming available
Bulk, block, and byte erasing
available
Byte programming available
Only byte erasing available
EEBP2 = 1
Protected
Protected
$0980–$09FF
EEBP3 = 0
Byte programming available
Bulk, block, and byte erasing
available
Byte programming available
Only byte erasing available
EEBP3 = 1
Protected
Protected
Address: $FE1C
Bit 7
6
5
4
3
2
1
Bit 0
Read:
UNUSED
UNUSED
UNUSED
EEPRTCT
EEBP3
EEBP2
EEBP1
EEBP0
Write:
Reset:
Programmed value or 1 in the erased state
Figure 2-5. EEPROM Non-Volatile Register (EENVR)
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.