MB90F654A FUJITSU [Fujitsu Component Limited.], MB90F654A Datasheet - Page 22

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

22
MB90650A Series
Notes: While the ROM data image of bank FF can be seen in the upper portion of bank 00, this is done only to permit
• MB90652, MB90653, MB90P653
MEMORY MAP
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.
Address #1
Address #2
Address #3
FFFFFF
FE0000
0000C0
010000
004000
002000
000100
000000
MB90652
MB90653
MB90P653
* : Address #1, #2, and #3 are different owing to their devices respectively.
H
H
H
H
H
H
H
H
Type
: No access
: Internal access memory
: External access memory
Single chip mode
RAM
(FF bank image)
Peripherals
ROM area
ROM area
H
to FFFFFF
Registers
H
Address #1
is to access to the ROM content of FFC000
FF0000
FE0000
FE0000
H
can be seen in bank 00, while FE0000
Internal ROM/external bus mode
H
H
H
RAM
(FF bank image)
*
Peripherals
ROM area
ROM area
Registers
Address #2
004000
004000
004000
H
H
H
External ROM/external bus mode
*
RAM
Address #3 *
H
Peripherals
H
to FF3FFF
000CFF
0014FF
0014FF
in practice.
Registers
H
H
H
H
can only be