RL78/G13 CHAPTER 3 CPU ARCHITECTURE
R01UH0146EJ0100 Rev.1.00 159
Sep 22, 2011
3.4.7 Based addressing
[Function]
Based addressing uses the contents of a register pair specified with the instruction word as a base address, and 8-
bit immediate data or 16-bit immediate data as offset data. The sum of these values is used to specify the target
address.
[Operand format]
Identifier Description
−
[HL + byte], [DE + byte], [SP + byte] (only the space from F0000H to FFFFFH is specifiable)
−
word[B], word[C] (only the space from F0000H to FFFFFH is specifiable)
−
word[BC] (only the space from F0000H to FFFFFH is specifiable)
−
ES:[HL + byte], ES:[DE + byte] (higher 4-bit addresses are specified by the ES register)
−
ES:word[B], ES:word[C] (higher 4-bit addresses are specified by the ES register)
−
ES:word[BC] (higher 4-bit addresses are specified by the ES register)
Figure 3-41. Example of [SP+byte]
Target memory
OP code
Memory
byte
FFFFFH
F0000H
SP
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