MB91155 datasheet(19/105 Pages) FUJITSU

19 / 105 page

MB91F155A/MB91155/MB91154

s CPU CORE

Memory Space

The FR family has a logical address space of 4 Gbytes (232 bytes) and the CPU linearly accesses the memory

space.

• Direct addressing area

The following area in the address space is used for I/O.

This area is called direct addressing area and an operand address can be specified directly in an instruction.

The direct addressing area varies with the data size to be accessed as follows :

Memory Map

→ byte data access :

0-0FFH

→ half word data access : 0-1FFH

→ word data access :

0-3FFH

• MB91F155, MB91155 Memory Space

Note : External areas are not accessible in single-chip mode.

0000 0000H

0000 0400H

0000 0800H

0000 1000H

0000 9000H

0001 0000H

FFFF FFFFH

0001 0000H

Direct

addressing

area

See "s I/O MAP"

0008 0000H

0008 0800H

0010 0000H

FFFF FFFFH

I/O

External ROM-

external bus mode

Internal ROM-

external bus mode

Single-chip mode

I/O

Not accessible

32 KB

internal RAM

32 KB

internal RAM

32 KB

internal RAM

Not accessible

External area

Not accessible

External area

Not accessible

2 KB internal RAM

510 KB

internal ROM

510 KB

internal ROM

External area

Not accessible

MB91155 Datasheet(PDF) 19 Page - fujitsu semiconductor

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