CHAPTER 3 CPU ARCHITECTURE
CHAPTER 3 CPU ARCHITECTURE
3.1 Memory Space
Products in the µPD789188 and 78F9189 Subseries can each access up to 64 Kbytes of memory space.
Figures 3-1 through 3-2 show the memory maps.
Figure 3-1. Memory Map (µPD789188)
FFFFH
Special function registers
256 × 8 bits
FF00H
FEFFH
Internal high-speed RAM
512 × 8 bits
FD00H
FCFFH
Data memory space
4000H
3FFFH
Reserved
3FFFH
Program area
Program memory
space
Internal ROM
16,384 × 8 bits
0000H
0080H
007FH
0040H
003FH
0024H
0023H
0000H
CALLT table area
Program area
Vector table area
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User’s Manual 2nd edition