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Figure 3.1-1 MB91191/MB91192 Memory Map
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