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CHAPTER 3 CPU
3.1.2
Memory Map
MB90895 series memory map is shown for each device.
I Memory Map
Figure 3.1-3 "Memory Map of MB90895 Series" shows the memory map for MB90895 series.
MB90F897/S
Single chip
0 0 0 0 0 0
H
I/O
0 0 0 0 C 0
H
0 0 0 1 0 0
H
general-purpose
0 0 0 9 0 0
H
0 0 3 9 0 0
H
Extended I/O area
0 0 4 0 0 0
H
ROM area
(Image in the
FF Bank)
0 1 0 0 0 0
H
F E 0 0 0 0
H
ROM*
F F 0 0 0 0
H
ROM
F F E 0 0 0
H
FFFFFF
H
: Internal access memory
: External access memory
: Access prohibited
*1: MB90V495G does not have bulit-in ROM. However, only the operating of dedicated
development tools can operate same as the bult-in ROM product.
*2: FF4000
MB90V495G.
*3: In MB90F897/S, when FE Bank is read, FF Bank can be read.
24
Figure 3.1-3 Memory Map of MB90895 Series
RAM
port
2
*
3
Hardwired reset vectors
to FFFFF
address can be seen as an image in the 00 bank in MB90F897/S and
H
H
MB90V495G
Internal ROM
Single chip
external bus
0 0 0 0 0 0
H
I/O
0 0 0 0 C 0
H
0 0 0 1 0 0
H
RAM
general-purpose
general-purpose
port
0 0 1 9 0 0
H
0 0 2 0 0 0
H
0 0 3 8 0 0
H
0 0 3 9 0 0
H
Extended I/O area
Extended I/O area
0 0 4 0 0 0
H
2
*
ROM area
ROM area
(Image in the
(Image in the
FF Bank)
FF Bank)
0 1 0 0 0 0
H
FC0000
H
1
ROM*
ROM*
FFFFFF
H
External ROM
external bus
I/O
I/O
RAM
RAM
general-purpose
port
port
Extended I/O area
2
*
1
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