CHAPTER 18 FLASH MEMORY
User’s Manual U16898EJ3V0UD
283
Figure 18-19. Format of Protect Byte
Address: 0081H
7 6 5 4 3 2 1 0
1
PRSELF4 PRSELF3 PRSELF2 PRSELF1 PRSELF0
1
1
•
µ
PD78F9221
PRSELF4 PRSELF3 PRSELF2 PRSELF1 PRSELF0
Status
0
1
1
0
0
Blocks 7 to 0 are protected.
0 1 1 0 1
Blocks 5 to 0 are protected.
Blocks 6 and 7 can be written or erased.
0 1 1 1 0
Blocks 3 to 0 are protected.
Blocks 4 to 7 can be written or erased.
0 1 1 1 1
Blocks 1 and 0 are protected.
Blocks 2 to 7 can be written or erased.
1
1
1
1
1
All blocks can be written or erased.
Other than above
Setting prohibited
•
µ
PD78F9222
PRSELF4 PRSELF3 PRSELF2 PRSELF1 PRSELF0
Status
0
1
0
0
0
Blocks 15 to 0 are protected.
0 1 0 0 1
Blocks 13 to 0 are protected.
Blocks 14 and 15 can be written or erased.
0 1 0 1 0
Blocks 11 to 0 are protected.
Blocks 12 to 15 can be written or erased.
0 1 0 1 1
Blocks 9 to 0 are protected.
Blocks 10 to 15 can be written or erased.
0 1 1 0 0
Blocks 7 to 0 are protected.
Blocks 8 to 15 can be written or erased.
0 1 1 0 1
Blocks 5 to 0 are protected.
Blocks 6 to 15 can be written or erased.
0 1 1 1 0
Blocks 3 to 0 are protected.
Blocks 4 to 15 can be written or erased.
0 1 1 1 1
Blocks 1 and 0 are protected.
Blocks 2 to 15 can be written or erased.
1
1
1
1
1
All blocks can be written or erased.
Other than above
Setting prohibited