CHAPTER 3 CPU ARCHITECTURE
Figure 3-11. Data Memory Addressing (µPD789446, 789456)
Special function registers (SFRs)
FFFFH
SFR addressing
256 × 8 bits
FF20H
FF1FH
FF00H
FEFFH
Short direct
Internal high-speed RAM
addressing
512 × 8 bits
FE20H
FE1FH
Direct addressing
FD00H
FCFFH
Register indirect
addressing
Reserved
FA0FH
FA0EH
Based addressing
LCD display RAM
15 × 4 bits
FA00H
F9FFH
Reserved
4000H
3FFFH
Internal ROM
16384 × 8 bits
0000H
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