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3.1 Memory Space
The PD789489 Subseries can access 64 KB of memory space. Figures 3-1 to 3-4 show the memory maps.
F F F F H
F F 0 0 H
F E F F H
F B 0 0 H
F A F F H
F A 1 C H
F A 1 B H
Data memory
F A 0 0 H
space
F 9 F F H
8 0 0 0 H
7 F F F H
Program memory
space
0 0 0 0 H
48
CHAPTER 3 CPU ARCHITECTURE
Figure 3-1. Memory Map ( PD789488)
Special function registers
256
8 bits
Internal high-speed RAM
1024
8 bits
Reserved
LCD display RAM
28
4 bits
Reserved
Internal ROM
32768
8 bits
User's Manual U15331EJ4V1UD
7 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 2 E H
0 0 2 D H
Vector table area
0 0 0 0 H
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