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3.1 Memory Space
The PD789800 Subseries can access 64 KB of memory space.
Figures 3-1 and 3-2 show the memory maps.
F
F
F
F
F
F
0
0
F
E
F
F
F
E
0
0
F
D
F
F
Data memory
space
2
0
0
0
1
F
F
F
Program memory
space
0
0
0
0
CHAPTER 3
CPU ARCHITECTURE
Figure 3-1. Memory Map ( PD789800)
H
Special function register
256
8 bits
H
H
Internal high-speed RAM
256
8 bits
H
H
Reserved
H
H
Internal ROM
8,192
8 bits
H
User's Manual U12978EJ3V0UD
1
F
F
F
H
Program area
0
0
8
0
H
0
0
7
F
H
CALLT table area
0
0
4
0
H
0
0
3
F
H
Program area
0
0
1
A
H
0
0
1
9
H
Vector table area
0
0
0
0
H
35
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