Data Memory Addressing ( Pd78P058, 78P058Y) - NEC PD78052 User Manual

Figure 5-16. Data Memory Addressing ( PD78P058, 78P058Y)
FFFFH
Special Function
Registers (SFRs)
256
FF20H
FF1FH
FF00H
FEFFH
General Registers
32 8 bits
FEE0H
FEDFH
Internal High-speed RAM
1024
FE20H
FE1FH
FB00H
FAFFH
Reserved
FAE0H
FADFH
Internal Buffer RAM
32
FAC0H
FABFH
Reserved
F800H
F7FFH
Internal Expansion RAM
1024
F400H
F3FFH
Reserved
F000H
EFFFH
Internal PROM
61440
0000H
Note When internal PROM size is 60K bytes, the area F000H to F3FFH cannot be used. F000H to F3FFH
can be used as external memory by setting the internal PROM size to less than 56K bytes by the
memory size switching register (IMS).
108
CHAPTER 5 CPU ARCHITECTURE
SFR Addressing
8 bits
Register Addressing
8 bits
8 bits
8 bits
Note
8 bits
Short Direct
Addressing
Direct Addressing
Register Indirect
Addressing
Based Addressing
Based Indexed
Addressing