MC68HC705 MOTOROLA [Motorola, Inc], MC68HC705 Datasheet - Page 152
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MC68HC705
Manufacturer Part Number
MC68HC705
Description
HCMOS Microcontroller Unit
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC705.pdf
(222 pages)
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Instruction Set
12.2 Introduction
12.3 Addressing Modes
Technical Data
152
The MCU instruction set has 62 instructions and uses eight addressing
modes. The instructions include all those of the M146805 CMOS Family
plus one more: the unsigned multiply (MUL) instruction. The MUL
instruction allows unsigned multiplication of the contents of the
accumulator (A) and the index register (X). The high-order product is
stored in the index register, and the low-order product is stored in the
accumulator.
The CPU uses eight addressing modes for flexibility in accessing data.
The addressing modes provide eight different ways for the CPU to find
the data required to execute an instruction.
The eight addressing modes are:
•
•
•
•
•
•
•
•
Inherent
Immediate
Direct
Extended
Indexed, no offset
Indexed, 8-bit offset
Indexed, 16-bit offset
Relative
Instruction Set
MC68HC705C8A — Rev. 2.0
MOTOROLA