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MB90F482 Scheda tecnica(PDF) 18 Page - fujitsu semiconductor

Il numero della parte MB90F482
Spiegazioni elettronici  16-bit Proprietary Microcontroller CMOS
PDF  113 Pages
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Produttore elettronici  FUJITSU [fujitsu semiconductor]
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MB90F482 Scheda tecnica(HTML) 18 Page - fujitsu semiconductor

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MB90480/485 Series
18
s
s
s
s MEMORY MAP
* : 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 is the same, enabling reference to tables in ROM without the “far” 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 K bytes 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.
Model
Address #1
Address #2
Address #3
MB90F481
FC0000H *
004000H or 008000H,
selected by the MS bit in
the ROMM register
001100H
MB90F482
FC0000H
001900H
MB90487
FD0000H
002900H
MB90F488
FC0000H
002900H
MB90V480
(FC0000H)
004000H
MB90V485
(FC0000H)
004000H
FFFFFFH
010000H
000100H
0000D0H
000000H
RAM
RAM
RAM
Single chip
ROM area
ROM area
FF bank image
Address #1
Address #3
Register
Peripheral
Internal ROM
external bus
ROM area
ROM area
FF bank image
Register
Peripheral
External ROM
external bus
Register
Peripheral
: internal
: External
: Access inhibited
Address #2
* : In models where address #3 overlaps with address #2, this external area does not exist.
*



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