NEC 78K0 User Manual page 70

Figure 3-7. Correspondence Between Data Memory and Addressing (
FFFFH
Special function registers (SFR)
256 × 8 bits
FF20H
FF1FH
FF00H
FEFFH
General-purpose registers
32 × 8 bits
FEE0H
FEDFH
Internal high-speed RAM
1024 × 8 bits
FE20H
FE1FH
FB00H
FAFFH
Reserved
FA20H
FA1FH
Buffer RAM
32 × 8 bits
FA00H
F9FFH
Reserved
F 80 0H
F7FFH
External memory
30720 × 8 bits
8 00 0H
7FFFH
Internal ROM
32768 × 8 bits
0 00 0H
70
CHAPTER 3 CPU ARCHITECTURE
SFR addressing
Register addressing
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User's Manual U15947EJ2V0UD
µ
PD780144)
Short direct
addressing
Direct addressing
Register indirect addressing
Based addressing
Based indexed addressing