MC68HC908LK24 MOTOROLA [Motorola, Inc], MC68HC908LK24 Datasheet - Page 77

• Manufacturer Part Number: MC68HC908LK24
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

4.8.1 FLASH Block Protect Register
MC68HC908LJ24/LK24 — Rev. 2
MOTOROLA
Non-volatile FLASH register; write by programming.
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:
Start address of FLASH block protect
BPR[7:0] represent bits [14:7] of a 16-bit memory address. Bits
[15:14] are logic 1’s and bits [6:0] are logic 0’s.
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 or $XX80 (at
page boundaries — 128 bytes) within the FLASH memory.
Examples of protect start address is shown in
Freescale Semiconductor, Inc.
For More Information On This Product,
Figure 4-4. FLASH Block Protect Register (FLBPR)
$FFCF
BPR7
Bit 7
Go to: www.freescale.com
FLASH Memory (FLASH)
BPR6
6
BPR5
5
Unaffected by reset; $FF when blank
BPR4
4
1
BPR3
BPR[7:0]
3
16-bit memory address
BPR2
Table
FLASH Memory (FLASH)
2
FLASH Block Protection
4-1:
0 0 0 0 0 0 0
BPR1
1
Data Sheet
BPR0
Bit 0
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