NEC PD78055 Manuale Utente
91
CHAPTER 5 CPU ARCHITECTURE
5.1 Memory Spaces
Each product of the
µ
PD78054 and 78054Y Subseries can access the memory space of 64 Kbytes. Figures 5-1
to 5-8 show memory maps.
Figure 5-1. Memory Map (
µ
PD78052, 78052Y)
0000H
Data memory
space
space
General Registers
32
×
8 bits
Internal ROM
16384
×
8 bits
3FFFH
1000H
0FFFH
0FFFH
0800H
07FFH
07FFH
0080H
007FH
007FH
0040H
003FH
003FH
0000H
CALLF Entry Area
CALLT Table Area
Vector Table Area
Program Area
Program Area
Internal Buffer RAM
32
×
8 bits
External Memory
47744
×
8 bits
Reserved
Program
memory
space
memory
space
4000H
3FFFH
3FFFH
FA80H
FA7FH
FA7FH
FAC0H
FABFH
FABFH
FAE0H
FADFH
FADFH
FEE0H
FEDFH
FEDFH
FF00H
FEFFH
FEFFH
FFFFH
Internal High-speed RAM
512
×
8 bits
Special Function
Registers (SFRs)
Registers (SFRs)
256
×
8 bits
Reserved
FD00H
FCFFH
FCFFH