Memory space – FUJITSU MB91401 User Manual
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MB91401
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MEMORY SPACE
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Memory space
The FR family has 4 GByte of logical addresses (2
32
address) which can be linearly accessed by the CPU.
Direct Addressing Areas
The following address space areas are used as I/O areas.
These areas are called direct addressing areas, in which the address of an operand can be specified directly
during an instruction.
The direct addressing area varies as shown below depending on the size of access data:
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Memory Map
The memory space of the macro consists of the following areas.
→
byte data access
: 0-0FF
H
→
half word data access
: 0-1FF
H
→
word data access
: 0-3FF
H
I/O
I/O
0000 0000
H
0000 0400
H
0001 0000
H
0002 0000
H
0003 F800
H
0004 0000
H
FFFF FFFF
H
I-bus RAM 4 KB
D-bus RAM 8 KByte
Direct Addressing Areas
Refer to I/O Map
(and its mirror)
Access disallowed area
External area
Prelminary
2004.11.12