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User’s Manual U12978EJ3V0UD
35
CHAPTER 3 CPU ARCHITECTURE
3.1 Memory Space
The
µ
PD789800 Subseries can access 64 KB of memory space.
Figures 3-1 and 3-2 show the memory maps.
Figure 3-1. Memory Map (
µ
µµ
µ
PD789800)
Reserved
Internal ROM
8,192 × 8 bits
Internal high-speed RAM
256 × 8 bits
Special function register
256 × 8 bits
HFFFF
H00FF
HFFEF
H00EF
HFFDF
HFFF1
H0800
HF700
H0400
HF300
HA100
H9100
H0000
H0002
H0000
Data memory
space
Program memory
space
Program area
CALLT table area
Vector table area
Program area
HFFF1