mc68hc912dg128 Freescale Semiconductor, Inc, mc68hc912dg128 Datasheet - Page 433

• Manufacturer Part Number: mc68hc912dg128
• Description: M68hc12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

EEPROT — EEPROM Block Protect
MC68HC912DG128 — Rev 3.0
MOTOROLA
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
Freescale Semiconductor, Inc.
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
For More Information On This Product,
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
Appendix: MC68HC912DG128A EEPROM
5
1
erased.
programmed and erased.
5
0
0
Table 22-2. 2K byte EEPROM Block Protection
Go to: www.freescale.com
Bit Name
BPROT5
BPROT4
BPROT3
BPROT2
BPROT1
BPROT0
BPROT4
4
1
4
0
0
BPROT3
3
0
0
3
1
Block Protected
$0C00 to $0DFF
$0FC0 to $0FFF
$0E00 to $0EFF
$0F80 to $0FBF
$0800 to $0BFF
$0F00 to $0F7F
ETMSD
BPROT2
Appendix: MC68HC912DG128A EEPROM
2
0
2
1
ETMR
BPROT1
1
0
1
1
EEPROM Control Registers
Block Size
1024 Bytes
512 Bytes
256 Bytes
128 Bytes
64 Bytes
64 Bytes
ETMSE
Bit 0
BPROT0
0
Bit 0
1
Technical Data
$00F2
$00F1
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