M68HC12A4EVB Freescale Semiconductor, M68HC12A4EVB Datasheet - Page 95

• Manufacturer Part Number: M68HC12A4EVB
• Manufacturer: Freescale Semiconductor

Specifications of M68HC12A4EVB

• Lead Free Status / Rohs Status: Not Compliant

7.3.2 EEPROM Block Protect Register
The EEPROM block protect register (EEPROT) prevents accidental writes to EEPROM.
Read anytime.
Write anytime if EEPGM = 0 and PROTLCK = 0.
BPROT4–BPROT0 — EEPROM Block Protection Bit
7.3.3 EEPROM Test Register
Read anytime. Write in special modes only (SMODN = 0). These bits are used for test purposes only. In
normal modes, the bits are forced to 0.
EEODD — Odd Row Programming Bit
EEVEN — Even Row Programming Bit
Freescale Semiconductor
Cannot be modified while programming is taking place (EEPGM = 1).
Refers to a physical location in the array rather than an odd byte address
Refers to a physical location in the array rather than an even byte address.
0 = Associated EEPROM block can be programmed and erased.
1 = Associated EEPROM block is protected from being programmed and erased.
0 = Odd row bulk programming/erasing is disabled.
1 = Bulk program/erase all odd rows.
0 = Even row bulk programming/erasing is disabled.
1 = Bulk program/erase all even rows.
Address: $00F1
Address: $00F2
Reset:
Read:
Write:
Reset:
Read:
Write:
Bit Name
BPROT4
BPROT3
BPROT2
BPROT1
BPROT0
EEODD
Bit 7
Figure 7-3. EEPROM Block Protect Register (EEPROT)
Bit 7
1
1
0
Table 7-1. 768-Byte EEPROM Block Protection
Figure 7-4. EEPROM Test Register (EETST)
EEVEN
6
1
1
6
0
M68HC12B Family Data Sheet, Rev. 9.1
MARG
5
1
1
5
0
Block Protected
$0D00 to $0DFF
$0FC0 to $0FFF
$0E00 to $0EFF
$0F80 to $0FBF
$0F00 to $0F7F
BRPROT4
EECPD
4
1
4
0
BRPROT3
EECPRD
3
1
3
0
BRPROT2
2
1
2
0
0
Block Size
256 bytes
256 bytes
128 bytes
64 bytes
64 bytes
BRPROT1
EECPM
1
0
1
1
EEPROM Control Registers
BRPROT0
Bit 0
Bit 0
0
0
1
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