Fig. 25.2 Sector Configuration Of 1-Mbit Flash Memory - Fujitsu MB90420/5 (A) Series Hardware Manual

n Sector configuration of 1-Mbit flash memory
Figure 25.2 shows the sector configuration of 1-Mbit flash memory. The upper and lower addresses of each
sector are given in the figure.
Sector Configuration
For access from the CPU, the FF bank register has SA0 and the FE bank register has SA1 to SA6.
* Writer address: The writer address is equivalent to the CPU address where data is programmed to
flash memory by a parallel writer. This address is where programming and erasing are performed by a
general-purpose writer.
1-MBIT FLASH MEMORY
Flash memory
SA4 (16 Kbytes)
SA3 (8 Kbytes)
SA2 (8 Kbytes)
SA1 (32 Kbytes)
SA0 (64 Kbytes)

Fig. 25.2 Sector Configuration of 1-Mbit Flash Memory

CPU address Writer address*
FFFFFF 7FFFF
H
FFC000 7C000
H
FFBFFF 7BFFF
H
FFA000 7A000
H
FF9FFF 79FFF
H
FF8000 78000
H
FF7FFF 77FFF
H
FF0000 70000
H
FEFFFF 6FFFF
H
FE0000 60000
H
25-5
H
H
H
H
H
H
H
H
H
H