upd78f0730 Renesas Electronics Corporation., upd78f0730 Datasheet - Page 51

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

3.4 Operand Address Addressing
during instruction execution.
3.4.1 Implied addressing
The following methods are available to specify the register and memory (addressing) to undergo manipulation
[Function]
[Operand format]
[Description example]
The register that functions as an accumulator (A and AX) among the general-purpose registers is automatically
(implicitly) addressed.
Of the PD78F0730 instruction words, the following instructions employ implied addressing.
Because implied addressing can be automatically determined 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 A register and X register is stored in AX. In this example,
A register for multiplicand and AX register for product storage
AX register for dividend and quotient storage
A register for storage of numeric values that become decimal correction targets
A register for storage of digit data that undergoes digit rotation
Preliminary User’s Manual U19014EJ1V0UD
CHAPTER 3 CPU ARCHITECTURE
Register to Be Specified by Implied Addressing
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