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| 型號： | MB90T673 |
| 廠商： | Fujitsu Limited |
| 英文描述： | Quadruple Bus Buffer Gates With 3- State Outputs 14-CDIP -55 to 125 |
| 中文描述： | 16位微控制器專有 |
| 文件頁數(shù)： | 28/124頁 |
| 文件大小： | 2584K |
| 代理商： | MB90T673 |
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MB90670/675 Series
28
I
MEMORY MAP
Notes: The ROM data of bank FF is reflected in the upper address of bank 00, realizing effective use of the C
compiler small model. The lower 16-bit of bank FF and the lower 16-bit of bank 00 is assigned to the same
address, enabling reference of the table on the ROM without stating “far”.
However, the ROM area of the MB90678/P678 exceeds 48 Kbytes, and for this reason, the image from
FF4000
H
to FFFFFF
H
is reflected on bank 00 and image from FF0000
H
to FF3FFF
H
bank FF only.
In the MB90670/675 series, the upper 4-bit of the address are not output to the external bus. For this
reason, the maximum area accessible is 1 Mbyte. The same address is accessed through different banks
in different images.
For example, accessing “A00000
H
” and “B00000
H
” accesses the same address on the external bus.
To prevent the memory or I/O from being accessed through images, and the data from being destroyed,
it is recommended to limit number of banks to a maximum of 16 so that the banks are mapped without
interfering each other. Caution must be also taken when masking the upper address with the external
address output control register (HACR).
Part number
MB90671
MB90672
MB90673
MB90T673
MB90P673
MB90676
MB90677
MB90678
MB90T678
MB90P678
Address #1*
2
FFC000
H
FF8000
H
FF4000
H
—
FF4000
H
FF8000
H
FF4000
H
FF0000
H
—
FF0000
H
Address #2
*
2
00C000
H
008000
H
004000
H
—
004000
H
008000
H
004000
H
004000
H
—
004000
H
Address #3
*
2
000380
H
000780
H
000900
H
000900
H
000900
H
000780
H
000900
H
000D00
H
000D00
H
000D00
H
FFFFFF
H
Address#1
100000
H
010000
H
Address #2
Address #3
000100
H
0000C0
H
000000
H
ROM area
ROM area
ROM area
(image of
bank FF)
ROM area
(image of
bank FF)
External
area
External
area
External
area
Peripheral
External
area
RAM
RAM
RAM
Register
Register
Register
Peripheral
Peripheral
Single-chip mode
Internal ROM
external bus mode
External ROM
external bus mode
: Internal access memory
: Enternal access memory
*1: The same external memory is accessed for bank 0F, 1F, 2F through FF.
*2: Addresses #1, #2 and #3 are unique to the product type.
: Inhibited area
002000
H
004000
H
*
1
External
area
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MB90T673PF | 16-Bit Buffers/Drivers With 3-State Outputs 48-CFP -55 to 125 |
| MB90678 | 16-bit Proprietary Microcontroller |
| MB90T673PFV | 16-Bit Bus Transceivers With 3-State Outputs 48-CFP -55 to 125 |
| MB90T678PF | 16-BIT BUFFERS/DRIVERS WITH 3-STATE OUTPUTS 48-CFP -55 to 125 |
| MB90T678PFV | 16-bit Proprietary Microcontroller |
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