參數(shù)資料
型號： MB90F897SPMT
元件分類： 微控制器/微處理器
英文描述： MICROCONTROLLER, PQFP48
封裝： 7 X 7 MM, 1.70 MM HEIGHT, 0.50 MM PITCH, PLASTIC, LQFP-48
文件頁數(shù)： 5/84頁
文件大?。?/td> 1773K
代理商： MB90F897SPMT
MB90895 Series
DS07-13731-4E
13
■ MEMORY MAP
MB90895 series allows specifying a memory access mode “single chip mode.”
1.
Memory allocation of MB90895
MB90895 series model has 24-bit wide internal address bus and up to 24-bit bus of external address bus.
A maximum of 16 Mbyte memory space of external access memory is accessible.
2.
Memory map
Note : When internal ROM is operating, F2MC-16LX allows viewing ROM data image on FF bank at upper-level of
00 bank. This function is called “mirroring ROM,” which allows effective use of C compiler small model.
F2MC-16LX assigns the same low order 16-bit address to FF bank and 00 bank, which allows referencing
table in ROM without specifying “far” using pointer.
For example, when accessing to “00C000H”, ROM data at “FFC000H” is accessed actually. However, because
ROM area of FF bank exceeds 48 Kbytes, viewing all areas is not possible on 00 bank image. Because
ROM data of “FF4000H” to “FFFFFFH” is viewed on “004000H” to “00FFFFH” image, store a ROM data table
in area “FF4000H” to “FFFFFFH.”
FFFFFF H
FE0000 H
010000 H
003900 H
004000 H
000100 H
0000C0 H
000000 H
MB90V495G
MB90F897/S
001900 H
000900 H
FF0000 H
(with ROM mirroring
function enabled)
Peripheral
RAM area
Register
Extension IO
ROM area
(FF bank image)
ROM area
Address #1
Model
: Internal access memory
: Access disallowed
* : On MB90F897/S, to read “FE0000H” to “FEFFFFH” is to read out “FF0000H” to “FFFFFFH”.
ROM area*
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