Fujitsu MB91191 ユーザーズマニュアル

25

Note:

Under single-chip mode, access to the external extension area is impossible.

Select internal ROM external bus mode using the mode register to access the external extension
area.

I/O area

PPG0 Data RAM area 256byte

SIO0 Data RAM area 128byte

PPG1 Data RAM area 64byte

I/O

 area

I/O

 area

Access interdiction

Access interdiction

SIO1 Data RAM area 128byte

SIO2 Data RAM area 128byte

Internal RAM

 area 

6Kbyte

Access interdiction

Internal RAM

 area 

2Kbyte

Internal ROM

 area 

(254kByte)

Reset vector

External expansion area

I/O area

PPG0 Data RAM area 256byte

SIO0 Data RAM area 128byte

PPG1 Data RAM area 64byte

I/O

 area

I/O

 area

Access interdiction

Access interdiction

SIO1 Data RAM area 128byte

SIO2 Data RAM area 128byte

Internal RAM

 area 

8Kbyte

Access interdiction

Internal RAM

 area 

2Kbyte

Internal ROM

 area 

(384kByte)

Reset vector

External expansion area

Access interdiction

00000000

H

000001FF

H

00000200

H

000002FF

H

00000300

H

0000037F

H

00000380

H

000003BF

H

000003C0

H

000003FF

H

00000400

H

000007FF

H

00000800

H

00000FFF

H

00001000

H

0000107F

H

00001080

H

000010FF

H

00001100

H

0000E7FF

H

0000E800

H

0000FFFF

H

00010000

H

000BFFFF

H

000C0000

H

000C07FF

H

000C0800

H

000FFFFB

H

000FFFFC

H

00100000

H

FFFFFFFF

H

00000000

H

000001FF

H

00000200

H

000002FF

H

00000300

H

0000037F

H

00000380

H

000003BF

H

000003C0

H

000003FF

H

00000400

H

000007FF

H

00000800

H

00000FFF

H

00001000

H

0000107F

H

00001080

H

000010FF

H

00001100

H

0000DFFF

H

0000E000

H

0000FFFF

H

00010000

H

000A0000

H

000FFFFB

H

000FFFFC

H

00100000

H

FFFFFFFF

H

0007FFFF

H

00080000

H

000807FF

H

00080800

H

0009FFFF

H

Direct
Access
Area

MB91191R

MB91192

1KB

Initial vector area