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CHAPTER 2 CPU
2.3 Memory Map
The memory map of the MB90360 Series is shown in Figure 2.3-1 .
■ Memory Map
The ROM data in the high-order portion of FF-bank can be seen as an image in the higher 00-bank in order
to support the small model C compiler. Since the low-order 16 bits are identical, this part of the ROM data
can be referred without using the far specification in the pointer declaration.
For example, when 00C000
H
is accessed, the contents of ROM at FFC000
H
are read. However, since the
ROM area in the FF bank exceeds 32K bytes, its entire image cannot be mirrored in the 00 bank.
The image between FF8000
H
and FFFFFF
H
is visible in bank 00, whereas the data between FF0000
H
and
FF7FFF
H
is only visible in bank FF.
Figure 2.3-1 Memory Map
FFFFFFH
FF0000H
FEFFFFH
FE0000H
FDFFFFH
FD0000H
FCFFFFH
FC0000H
FBFFFFH
FB0000H
FAFFFFH
FA0000H
F9FFFFH
0000EFH
000000H
F90000H
F8FFFFH
F80000H
00FFFFH
007FFFH
007900H
0078FFH
000100H
008000H
MB90V340A-101/102/103/104
FFFFFFH
FF0000H
0000EFH
000000H
00FFFFH
007FFFH
007900H
000CFFH
000100H
008000H
MB90F362/T(S)
MB90362/T(S)
MB90F367/T(S)
MB90367/T(S)
ROM (FF bank)
ROM (FE bank)
ROM (FD bank)
ROM (FC bank)
ROM (FB bank)
ROM (FA bank)
ROM (F9 bank)
ROM (F8 bank)
ROM
(image of FF bank)
ROM
(image of FF bank)
Peripheral
RAM 30KB
RAM 3KB
ROM (FF bank)
Peripheral
Peripheral
Peripheral
Access prohibited
010000H
FEFFFFH
0000F0H
0000FFH