MC68HC08AS32A Datasheet, PDF (48/296 Pages) Motorola, Inc – Microcontrollers

Memory
Freescale Semiconductor, Inc.
2.5.2.2 EEPROM Array Configuration Register
The EEPROM array configuration register configures EEPROM security and
EEPROM block protection. This read-only register is loaded with the contents of
the EDEPROM non-volatile register (EENVR) after a reset.
Address: $FE1F
Bit 7
Read: UNUSED
Write:
Reset:
6
5
4
3
UNUSED UNUSED EEPRTCT EEBP3
2
EEBP2
= Unimplemented
Contents of EENVR ($FE1C)
1
EEBP1
Bit 0
EEBP0
Figure 2-4. EEPROM Array Configuration Register (EEACR)
NOTE:
Bits 7:5 — Unused Bits
These read/write bits are software programmable but have no functionality.
EEPRTCT — EEPROM Protection Bit
The EEPRTCT bit is used to enable the security feature in the EEPROM (see
2.5.1.3 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.
EEEBP[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 army block is unprotected
Block Number (EEBPx)
EEBP0
EEBP1
EEBP2
EEBP3
Address Range
$0800—$087F
$0880–$08FF
$0900–$097F
$0980–$09FF
Data Sheet
48
Memory
For More Information On This Product,
Go to: www.freescale.com
MC68HC08AS32A — Rev. 1
MOTOROLA