UPD78F0988AGC-8BS Renesas Electronics America, UPD78F0988AGC-8BS Datasheet - Page 80

• Manufacturer Part Number: UPD78F0988AGC-8BS
• Manufacturer: Renesas Electronics America

Specifications of UPD78F0988AGC-8BS

• Lead Free Status / Rohs Status: Supplier Unconfirmed

3.4.2 Register addressing
78
[Function]
[Operand Format]
[Example]
This addressing is used to access a general-purpose register as an operand. The general-purpose register to
be accessed is specified by the register bank select flags (RBS0 and RBS1) and with the register specification
code (Rn and RPn) in an instruction code.
Register addressing is used when an instruction that has the following operand format is executed. When an
8-bit register is specified, one of the eight registers is specified by 3 bits in the instruction code.
r and rp can be described not only by a function name (X, A, C, B, E, D, L, H, AX, BC, DE, or HL) but also by
an absolute name (R0 to R7, RP0 to RP3).
MOV A, C; To select C register as r
INCW DE; To select DE register pair as rp
Instruction code
Instruction code
r
rp
Representation
CHAPTER 3 CPU ARCHITECTURE
User’s Manual U13029EJ7V1UD
0 1 1 0 0 0 1 0
1 0 0 0 0 1 0 0
X, A, C, B, E, D, L, H
AX, BC, DE, HL
Description
Register specification code
Register specification code