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MB90480 Datasheet(PDF) 19 Page - Fujitsu Component Limited.

Part No. MB90480
Description  16-bit Proprietary Microcontroller
Download  120 Pages
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Maker  FUJITSU [Fujitsu Component Limited.]
Homepage  http://edevice.fujitsu.com/fmd/en/index.html
Logo FUJITSU - Fujitsu Component Limited.

MB90480 Datasheet(HTML) 19 Page - Fujitsu Component Limited.

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MB90480/485 Series
19
■ MEMORY MAP
• MB90F481/F482/487B/488B/483C/F488B/V480/V485B/F489B
*1 : No memory cells from FC0000H to FC7FFFH and FE0000H to FE7FFFH.
The upper part of the 00 bank is set up to mirror the image of FF bank ROM, to enable efficient use of small
model C compilers. Because the lower 16-bit address of the FF bank and the lower 16-bit address of the 00
bank are the same, enabling reference to tables in ROM without using the for specification in the pointer
declaration.
For example, in accessing address 00C000H it is actually the contents of ROM at FFC000H that are accessed.
If the MS bit in the ROMM register is set to “0”, the ROM area in the FF bank will exceed 48 Kbytes and it is
not possible to reflect the entire area in the image in the 00 bank. Therefore the image from FF4000H to FFFFFFH
is reflected in the 00 bank and the area from FF0000H to FF3FFFH can be seen in the FF bank only.
(Continued)
Model
Address #1
Address #2
Address #3
MB90F481
FC0000H *1
004000H or 008000H,
selected by the MS bit in
the ROMM register
001100H
MB90F482
FC0000H
001900H
MB90487B
FD0000H
002900H
MB90488B
FC0000H
002900H
MB90F488B
FC0000H
002900H
MB90V480
(FC0000H)
004000H
MB90V485B
(FC0000H)
004000H
MB90483C
FB0000H*4
004000H
MB90F489B
F90000H *2
0080000H fixed
006100H*3
FFFFFFH
010000H
000100H
0000D0H
000000H
RAM
RAM
RAM
ROM area
ROM area
ROM area
FF bank image
ROM area
FF bank image
Peripheral
Peripheral
Peripheral
Single chip
Internal ROM
external bus
External ROM
external bus
Address #1
Address #3
Register
: Internal
: External
: Access inhibited
Address #2
* : In models where address #3 overlaps with address #2, this external area does not exist.
Register
Register


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