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CHAPTER 3 CPU ARCHITECTURE
User’s Manual U15798EJ2V0UD
Figure 3-5. Correspondence Between Data Memory and Addressing
(
µ
PD780344, 780354, 780344Y, 780354Y)
Note
The area not used as LCD display data can be used as normal RAM.
Special function registers (SFRs)
256
×
8 bits
Internal high-speed RAM
512
×
8 bits
LCD display RAM
40
×
8 bits
Note
Internal expansion RAM
512
×
8 bits
General-purpose
registers 32
×
8 bits
Reserved
Reserved
Reserved
Internal ROM
32,768
×
8 bits
F F F F H
F F 0 0 H
F E F F H
F F 2 0 H
F F 1 F H
F E E 0 H
F E D F H
F E 2 0 H
F E 1 F H
F A 2 8 H
F A 2 7 H
F D 0 0 H
F C F F H
F 6 0 0 H
F 5 F F H
F 8 0 0 H
F 7 F F H
F A 0 0 H
F 9 F F H
8 0 0 0 H
7 F F F H
0 0 0 0 H
SFR addressing
Short direct
addressing
Register addressing
Direct addressing
Register indirect
addressing
Based addressing
Based indexed
addressing