mc68hc912dg128 Freescale Semiconductor, Inc, mc68hc912dg128 Datasheet - Page 129

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

EEPROT — EEPROM Block Protect
MC68HC912DG128 — Rev 3.0
MOTOROLA
RESET:
SHPROT
Bit 7
1
6
1
1
PROTLCK — Block Protect Write Lock
EERC — EEPROM Charge Pump Clock
Prevents accidental writes to EEPROM. Read anytime. Write anytime if
EEPGM = 0 and PROTLCK = 0.
SHPROT — SHADOW Byte Protection
BPROT[5:0] — EEPROM Block Protection
Read anytime. Write once in normal modes (SMODN = 1), set and
clear any time in special modes (SMODN = 0).
Read and write anytime.
Freescale Semiconductor, Inc.
For More Information On This Product,
0 = Block protect bits and bulk erase protection bit can be written
1 = Block protect bits are locked
0 = System clock is used as clock source for the internal charge
1 = Internal RC oscillator drives the charge pump. The RC oscillator
0 = The SHADOW byte can be programmed and erased.
1 = The SHADOW byte 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
pump. Internal RC oscillator is stopped.
is required when the system bus clock is lower than f
erased.
programmed and erased.
Table 8-1. 2K byte EEPROM Block Protection
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Bit Name
BPROT5
BPROT4
BPROT3
BPROT2
BPROT1
BPROT0
BPROT4
EEPROM Memory
4
1
BPROT3
3
1
Block Protected
$0C00 to $0DFF
$0E00 to $0EFF
$0F80 to $0FBF
$0FC0 to $0FFF
$0800 to $0BFF
$0F00 to $0F7F
BPROT2
2
1
BPROT1
1
1
EEPROM Control Registers
Block Size
1024 Bytes
512 Bytes
256 Bytes
128 Bytes
64 Bytes
64 Bytes
BPROT0
Bit 0
EEPROM Memory
1
Technical Data
PROG
$00F1
.
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