参数资料
型号: MC68HC805P18CP
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, EEPROM, 2.1 MHz, MICROCONTROLLER, PDIP28
封装: PLASTIC, DIP-28
文件页数: 11/144页
文件大小: 1292K
代理商: MC68HC805P18CP
Advance Information
MC68HC(8)05P18 — Rev. 2.0
108
Instruction Set
MOTOROLA
Instruction Set
12.3 Addressing Modes
The CPU uses eight addressing modes for flexibility in accessing data.
The addressing modes define the manner in which the CPU finds 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
12.3.1 Inherent
Inherent instructions are those that have no operand, such as return
from interrupt (RTI) and stop (STOP). Some of the inherent instructions
act on data in the CPU registers, such as set carry flag (SEC) and
increment accumulator (INCA). Inherent instructions require no memory
address and are one byte long.
12.3.2 Immediate
Immediate instructions are those that contain a value to be used in an
operation with the value in the accumulator or index register. Immediate
instructions require no memory address and are two bytes long. The
opcode is the first byte, and the immediate data value is the second byte.
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Freescale Semiconductor, Inc.
For More Information On This Product,
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