
CHAPTER 3 CPU ARCHITECTURE
User’s Manual U17894EJ9V0UD
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3.4.6 Register indirect addressing
[Function]
Register indirect addressing directly specifies the target addresses using the contents of the register pair
specified with the instruction word as an operand address.
[Operand format]
Identifier
Description
[DE], [HL] (only the space from F0000H to FFFFFH is specifiable)
ES:[DE], ES:[HL] (higher 4-bit addresses are specified by the ES register)
Figure 3-33. Example of [DE], [HL]
Target memory
OP code
Memory
rp
FFFFFH
F0000H
Figure 3-34. Example of ES:[DE], ES:[HL]
OP code
Memory
FFFFFH
00000H
Target memory
ES
rp