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CHAPTER 17 FLASH MEMORY
■ Sector Configuration of Flash Memory
Flash memory employs different address mapping depending on whether it is accessed from the FR-CPU or
from the ROM writer. Figure 17.1-2 and Table 17.1-1 show the mapping for access from the FR-CPU.
Figure 17.1-3 shows the mapping for access from the ROM writer.
● Mapping for Access from the FR-CPU
FFFF_FFFF
H
0010_0000
H
000F_FFFF
H
000C_0000
H
0000_0000
H
Table 17.1-1 Sector Address List (FR-CPU Access)
Sector Address
SAA9
SAA8
SAA7
SAA6
SAA5
SAA4
SAA3
SAA2
SAA1
SAA0
406
Figure 17.1-2 Mapping for Access from the FR-CPU
Flash
memory
256 KB
Byte position for
access in CPU mode
Address Range
F_8002, 3
to F_FFFE, F
H
F_4002, 3
to F_7FFE, F
H
F_0002, 3
to F_3FFE, F
H
E_0002, 3
to E_FFFE, F
H
C_0002, 3
to D_FFFE, F
H
F_8000, 1
to F_FFFC, D
H
F_4000, 1
to F_7FFC, D
H
F_0000, 1
to F_3FFC, D
H
E_0000, 1
to E_FFFC, D
H
C_0000, 1
to D_FFFC, D
H
000F_FFFF
H
SAA4 (16 KB)
000F _8000
H
000F_7FFF
H
SAA3 (8 KB)
000F _4000
H
000F_3FFF
H
SAA2 (8 KB)
000F _0000
H
000E_FFFF
H
SAA1 (32 KB)
000E_0000
H
000D_FFFF
H
SAA0 (64 KB)
000C_0000
H
bit
31
0
Bit Position
bit15 to bit0
H
bit15 to bit0
H
bit15 to bit0
H
bit15 to bit0
H
bit15 to bit0
H
bit31 to bit15
H
bit31 to bit15
H
bit31 to bit15
H
bit31 to bit15
H
bit31 to bit15
H
SAA9 (16 KB)
SAA8 (8 KB)
SAA7 (8 KB)
SAA6 (32 KB)
SAA5 (64 KB)
1615
0
1
2
3
Sector Capacity
16 KB
8 KB
8 KB
32 KB
64 KB
16 KB
8 KB
8 KB
32 KB
64 KB
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