UPD78F0078GK-9ET-A Renesas Electronics America, UPD78F0078GK-9ET-A Datasheet - Page 87

• Manufacturer Part Number: UPD78F0078GK-9ET-A
• Manufacturer: Renesas Electronics America

Specifications of UPD78F0078GK-9ET-A

• Lead Free Status / Rohs Status: Supplier Unconfirmed

5.4 Operand Address Addressing
during instruction execution.
5.4.1 Implied addressing
The following methods are available to specify the register and memory (addressing) which undergo manipulation
[Function]
[Operand format]
[Description example]
The register which functions as an accumulator (A, AX) in the general-purpose register area is automatically
(implicitly) addressed.
Of the PD780078, 780078Y Subseries instruction words, the following instructions employ implied addressing.
Because implied addressing can be automatically employed with an instruction, no particular operand format is
necessary.
In the case of MULU X
With an 8-bit
the A and AX registers are specified by implied addressing.
MULU
DIVUW
ADJBA/ADJBS
ROR4/ROL4
Instruction
8-bit multiply instruction, the product of register A and register X is stored in AX. In this example,
Register A for multiplicand and register AX for product storage
Register AX for dividend and quotient storage
Register A for storage of numeric values which become decimal correction targets
Register A for storage of digit data which undergoes digit rotation
CHAPTER 5 CPU ARCHITECTURE
Register to Be Specified by Implied Addressing
User’s Manual U14260EJ4V0UD
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