MC68HC908AB32 MOTOROLA [Motorola, Inc], MC68HC908AB32 Datasheet - Page 66

• Manufacturer Part Number: MC68HC908AB32
• Description: HCMOS Microcontroller Unit
• Manufacturer: MOTOROLA [Motorola, Inc]

FLASH Memory
4.8.1 FLASH Block Protect Register
Technical Data
66
Address:
The FLASH block protect register (FLBPR) is implemented as a byte
within the FLASH memory, and therefore can only be written during a
programming sequence of the FLASH memory. The value in this register
determines the starting location of the protected range within the FLASH
memory.
BPR[7:0] — FLASH Block Protect Bits
Reset:
Read:
Write:
These eight bits represent bits [14:7] of a 16-bit memory address.
Bit-15 is logic 1 and bits [6:0] are logic 0s.
The resultant 16-bit address is used for specifying the start address
of the FLASH memory for block protection. The FLASH is protected
from this start address to the end of FLASH memory, at $FFFF. With
this mechanism, the protect start address can be XX00 and XX80
(128 bytes page boundaries) within the FLASH memory.
Freescale Semiconductor, Inc.
Start address of FLASH block protect
For More Information On This Product,
U = Unaffected by reset. Initial value from factory is 1.
Write to this register is by a programming sequence to the FLASH memory.
Figure 4-3. FLASH Block Protect Register (FLBPR)
$FF7E
BPR7
Bit 7
U
Figure 4-4. FLASH Block Protect Start Address
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BPR6
FLASH Memory
U
6
BPR5
U
5
1
BPR4
U
4
FLBPR value
BPR3
16-bit memory address
U
3
MC68HC908AB32
BPR2
U
2
0 0 0 0 0 0 0
BPR1
U
1
MOTOROLA
—
Rev. 1.0
BPR0
Bit 0
U