70
CHAPTER 3 CPU ARCHITECTURE
Preliminary User’s Manual U16035EJ1V0UM
3.4.6 Register indirect addressing
[Function]
Register pair contents specified with a register pair specify code in an instruction word of the register bank
specified with a register bank select flag (RBS0 and RBS1) serve as an operand address for addressing the
memory to be manipulated. This addressing can be carried out for all 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
