MC68HC912DG128 Datasheet, PDF (433/452 Pages) Motorola, Inc – Microcontrollers

Freescale Semiconductor, Inc.
Appendix: MC68HC912DG128A EEPROM
EEPROM Control Registers
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 22-2. 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
MC68HC912DG128 — Rev 3.0
MOTOROLA
Appendix: MC68HC912DG128A EEPROM
For More Information On This Product,
Go to: www.freescale.com
Technical Data
433