UPD780957 Datasheet, PDF (54/326 Pages) NEC – 8-Bit Single-Chip Microcontrollers

CHAPTER 3 CPU ARCHITECTURE
Figure 3-4. Data Memory Addressing (µPD780958(A))
FFFFH
Special-function registers (SFR)
256 × 8 bits
FF20H
FF1FH
FE00H
FEFFH
FEE0H
FEDFH
General-purpose registers
32 × 8 bits
Internal high-speed RAM
1,024 × 8 bits
FE20H
FE1FH
FB00H
FAFFH
FA1EH
FA1DH
FA00H
F9FFH
F800H
F7FFH
F400H
F3FFH
F000H
EFFFH
Reserved
LCD display RAM
30 × 3 bits
Reserved
Internal expansion RAM
1,024 × 8 bits
Reserved
SFR addressing
Register addressing
Short direct addressing
Direct addressing
Register indirect addressing
Based addressing
Based indexed addressing
Internal ROM
61,440 × 8 bits
0000H
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User’s Manual U13655EJ2V1UD