CHAPTER 3 CPU ARCHITECTURE
Preliminary User’s Manual U19014EJ1V0UD
56
3.4.6 Register indirect addressing
[Function]
Register pair contents specified by a register pair specify code in an instruction word and by a register bank
select flag (RBS0 and RBS1) serve as an operand address for addressing the memory.
This addressing can be carried out for all of the memory spaces.
[Operand format]
Identifier Description
−
[DE], [HL]
[Description example]
MOV A, [DE]; when selecting [DE] as register pair
Operation code
1
0
0
0
0
1
0
1
[Illustration]
16
0
8
D
7
E
0
7
7 0
A
DE
The contents of the memory
addressed are transferred.
Memory
The memory address
specified with the
register pair DE
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