upd78f0730 Renesas Electronics Corporation., upd78f0730 Datasheet - Page 58

• Manufacturer Part Number: upd78f0730
• Description: 8-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

3.4.8 Based indexed addressing
58
[Function]
[Operand format]
[Description example]
[Illustration]
The B or C register contents specified in an instruction word are added to the contents of the base register, that
is, the HL register pair in the register bank specified by the register bank select flag (RBS0 and RBS1), and the
sum is used to address the memory. Addition is performed by expanding the B or C register contents as a
positive number to 16 bits. A carry from the 16th bit is ignored.
This addressing can be carried out for all of the memory spaces.
MOV A, [HL +B]; when selecting B register
The contents of the memory
addressed are transferred.
HL
Identifier
A
16
7
[HL + B], [HL + C]
Operation code
Preliminary User’s Manual U19014EJ1V0UD
CHAPTER 3 CPU ARCHITECTURE
H
8
0
1
+
7
7
7
Description
0
1
0
1
Memory
L
B
0
1
1
0
0
0