MB90F654A FUJITSU [Fujitsu Component Limited.], MB90F654A Datasheet - Page 21

• Manufacturer Part Number: MB90F654A
• Description: 16-bit Proprietary Microcontroller
• Manufacturer: FUJITSU [Fujitsu Component Limited.]

Note : While the ROM data image of bank FF can be seen in the upper portion of bank 00, this is done only to permit
• MB90654A, MB90F654A
effective use of the C compiler’s small model. Because the lower 16 bits are the same, it is possible to
reference tables in ROM without declaring the “far” specification in the pointer.
For example, to access to 00C000
Because the ROM area of FF bank exceeds 48 Kbytes, all the area can be seen in bank 00.
So, the image for FF4000
seen in bank FF and FE.
FFFFFF
0000C0
010000
002100
000100
000000
H
H
H
H
H
H
MB90F654A*
MB90654A*
* : In the MB90654A and MB90F654A, RAM area 2000H is 2100H.
Type
RAM
(FF bank image)
: No access
: Internal access memory
: External access memory
H
Peripherals
ROM area
to FFFFFF
ROM area
Registers
H
is to access to the ROM content of FFC000
H
can be seen in bank 00, while FE0000
Address #1
FC0000
FC0000
RAM
H
H
(FF bank image)
Peripherals
ROM area
Registers
Address #2
004000
004000
MB90650A Series
H
H
H
H
to FF3FFF
in practice.
RAM
Peripherals
Address #3
0020FF
0020FF
H
can only be
Registers
H
H
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