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1.7 Memory Address Space
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Direct addressing area
The following area in the address space is used for I/O. This area is called the direct
addressing area. The addresses in this area can be directly specified for instruction operands.
The direct addressing area varies depending on the size of accessed data as follows:
• Byte data access: 0 to 0FF
H
• Half-word data access: 0 to 1FF
H
• Word data access: 0 to 3FF
H