CHAPTER 3 CPU ARCHITECTURE
User’s Manual U18172EJ2V0UD
48
3.4.5 Register indirect addressing
[Function]
The memory is addressed with the contents of the register pair specified as an operand. The register pair to be
accessed is specified with the register pair specify code in the instruction code. This addressing can be carried
out for all the memory spaces.
[Operand format]
Identifier Description
−
[DE], [HL]
[Description example]
MOV A, [DE]; When selecting register pair [DE]
Instruction
code 0
0
1
0
1
0
1
1
[Illustration]
15
0
8
D
7
E
0
7
7 0
A
DE
The contents of addressed
memory are transferred
Memory address specified
by register pair DE