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3.7 Memory Map
The memory map for the FR20 series is shown.
■ Memory Map
The address space of the memory is 32 bit linear.
Figure 3.7-1 shows the memory map.
Figure 3.7-1 Memory map
●
Direct addressing
The under-mentioned region of the address space is a region for I/O. In this area, the operand address can
be specified directly within the command through direct addressing.
The size of the address area which an address can be directly specified is different in each data length.
• Byte data: (8 bits): 0 to 0FF
H
• Half-word data: (16 bits): 0 to 1FF
H
• Word data: (32 bits): 0 to 3FF
H
●
Vector table initial region
The region of 000FFC00
H
- 000FFFFF
H
is EITT vector table initial area.
The vector table used for EIT processing can be allocated to an arbitrary address by rewriting the TBR, but
it is allocated to this address on initialization through reset.
0000 0000
H
0000 0100
H
0000 0200
H
0000 0400
H
000F FC00
H
000F FFFF
H
Byte data
Halfword data
Direct addressing region
Word data
Vector table
initial region
FFFF FFFF
H