MC912DG128A Motorola, MC912DG128A Datasheet - Page 108

• Manufacturer Part Number: MC912DG128A
• Description: Microcontrollers
• Manufacturer: Motorola

EEPROT — EEPROM Block Protect
EEPROM
MC68HC912DT128A Rev 2.0
108
RESET:
EETST — EEPROM Test
RESET:
SHPROT
Bit 7
1
Bit 7
0
0
EREVTN
6
1
1
Prevents accidental writes to EEPROM. Read anytime. Write anytime if
EEPGM = 0 and PROTLCK = 0.
SHPROT — SHADOW Word Protection
BPROT[5:0] — EEPROM Block Protection
6
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
0 = The SHADOW word can be programmed and erased.
1 = The SHADOW word is protected from being programmed and
0 = Associated EEPROM block can be programmed and erased.
1 = Associated EEPROM block is protected from being
BPROT5
5
1
erased.
programmed and erased.
5
0
0
Table 18 2K byte EEPROM Block Protection
Bit Name
BPROT5
BPROT4
BPROT3
BPROT2
BPROT1
BPROT0
BPROT4
4
1
4
0
0
EEPROM
BPROT3
3
0
0
3
1
Block Protected
$0C00 to $0DFF
$0E00 to $0EFF
$0F80 to $0FBF
$0FC0 to $0FFF
$0800 to $0BFF
$0F00 to $0F7F
ETMSD
BPROT2
2
0
2
1
ETMR
BPROT1
1
0
1
1
Block Size
1024 Bytes
512 Bytes
256 Bytes
128 Bytes
64 Bytes
64 Bytes
ETMSE
Bit 0
BPROT0
0
Bit 0
1
MOTOROLA
$00F2
8-eeprom
$00F1