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CHAPTER 2 MEMORY ARCHITECTURE
2.1 FR Family Memory Space
The FR family controls memory space in byte units, and provides linear designation of
32-bit spaces. Also, to enhance instruction efficiency, specific areas of memory are
allocated for use as direct address areas and vector table areas.
■ Memory Space
Figure 2.1-1 illustrates memory space in the FR family.
For a detailed description of the direct address area, see Section "2.1.1 Direct Address Area", and for the
vector table area, see Section "2.1.2 Vector Table Area".
Figure 2.1-1 FR Family Memory Space
■ Unused Vector Table Area
Unused vector table area is available for use as program or data area.
0000 0000H
0000 0100H
0000 0200H
0000 0400H
000F FC00H
0010 0000H
FFFF FFFFH
Byte data
Half-word data
Word data
Vector table
initial area
Program or data area
000F FC00
H TBR
TBR initial value
Direct address area
General addressing