MC912DG128ACPVE Datasheet, PDF (130/478 Pages) Freescale Semiconductor, Inc – Upward compatible with M68HC11 instruction set

Freescale Semiconductor, Inc.
EEPROM Memory
EEPROT — EEPROM Block Protect
Bit 7
6
5
SHPROT
1
BPROT5
RESET:
1
1
1
4
BPROT4
1
3
BPROT3
1
2
BPROT2
1
1
BPROT1
1
Bit 0
BPROT0
1
$00F1
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.
Table 9-2. 2K byte EEPROM Block Protection
Bit Name
BPROT5
BPROT4
BPROT3
BPROT2
BPROT1
BPROT0
Block Protected
$0800 to $0BFF
$0C00 to $0DFF
$0E00 to $0EFF
$0F00 to $0F7F
$0F80 to $0FBF
$0FC0 to $0FFF
Block Size
1024 Bytes
512 Bytes
256 Bytes
128 Bytes
64 Bytes
64 Bytes
EETST — EEPROM Test
$00F2
Bit 7
6
5
4
3
2
1
Bit 0
0
EREVTN
0
0
0
ETMSD ETMR ETMSE
RESET:
0
0
0
0
0
0
0
0
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
Technical Data
130
MC68HC912DT128A — Rev 4.0
EEPROM Memory
For More Information On This Product,
Go to: www.freescale.com
MOTOROLA