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參數資料
| 型號： | SAE 81C91 |
| 廠商： | SIEMENS AG |
| 英文描述： | 16-bit microcontrollers(16位微控制器) |
| 中文描述： | 16位微控制器（16位微控制器） |
| 文件頁數： | 4/5頁 |
| 文件大小： | 21K |
| 代理商： | SAE 81C91 |
Semiconductor Group
4 of 5
AP2923 03.99
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The software MS-Windows 95/NT (32 bit system) are required.
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1) Download the file "AP292302.EXE" in a directory of your choice, e.g. c:\xyz“:
2) Run "AP292302.EXE". This will start the self-extraction of the files which are required to install
"CP_81C90.EXE".
3) Once the self-extraction process is finished, run "c:\xyz\setup.exe". This setup will ask in which
directory to install "CP_81C90.EXE". If this directory does not exist it will be created.
4) Once the installation is finished, a new progam appears in the program group of your start menu.
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1) Run "CP_81C90.EXE"
2) Fill in the "Cpu Freq." field with the SAE 81C90/91 input clock frequency (Xtal2). Press the
[Return] key.
3) Fill in the "Baudrate" field with the CAN bus desired baudrate. Press the [Return] key.
4) The "Calculate" button is now selected. Simply press the [Return] key. The possible
configurations of the bit timing registers, as well as the real baudrate and the bit segment
composition, will appear in the list window.
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The following relations were considered to calculate the bit timing:
Where:
Tosc
Clock period
BRP
BaudRate Prescaler of the SAE 81C90/91
tq
Nominal time quantum length
bd
Bus baudrate
Tosc
1
f
--
=
tq
2
BRP
(
1
+
)
Tosc
=
tb
1
bd
-----
=
Nb
tq
----
NTseg
1
NTseg
2
1
+
+
2
BRP
(
1
+
)
bd
-----------------------------------
=
=
=
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