Datasheet

EEPROM Memory
Technical Data MC68HC912DT128A — Rev 4.0
130 EEPROM Memory MOTOROLA
Prevents accidental writes to EEPROM. Read anytime. Write anytime if
EEPGM = 0 and PROTLCK = 0.
SHPROT — SHADOW Word Protection
0 = The SHADOW word can be programmed and erased.
1 = The SHADOW word is protected from being programmed and
erased.
BPROT[5:0] — EEPROM Block Protection
0 = Associated EEPROM block can be programmed and erased.
1 = Associated EEPROM block is protected from being
programmed and erased.
In normal mode, writes to EETST control bits have no effect and
always read zero. The EEPROM module cannot be placed in test
mode inadvertently during normal operation
EEPROT — EEPROM Block Protect $00F1
Bit 7654321Bit 0
SHPROT 1 BPROT5 BPROT4 BPROT3 BPROT2 BPROT1 BPROT0
RESET: 11111111
Table 9-2. 2K byte EEPROM Block Protection
Bit Name Block Protected Block Size
BPROT5 $0800 to $0BFF 1024 Bytes
BPROT4 $0C00 to $0DFF 512 Bytes
BPROT3 $0E00 to $0EFF 256 Bytes
BPROT2 $0F00 to $0F7F 128 Bytes
BPROT1 $0F80 to $0FBF 64 Bytes
BPROT0 $0FC0 to $0FFF 64 Bytes
EETST — EEPROM Test $00F2
Bit 7654321Bit 0
0 EREVTN 0 0 0 ETMSD ETMR ETMSE
RESET: 00000000
Frees
cale Semiconductor,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
nc...