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參數(shù)資料
| 型號(hào)： | W79E802A |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類(lèi)： | 8位微控制器 |
| 英文描述： | 8-BIT MICROCONTROLLER |
| 中文描述： | 8位微控制器 |
| 文件頁(yè)數(shù)： | 86/115頁(yè) |
| 文件大小： | 1456K |
| 代理商： | W79E802A |
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W79E804A/803A/802A
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The “weak” pull-up is turned on when the input port pin is logic “1” level or itself is logic “1”, and it
provides the most source current for a quasi-bidirectional pin that output is “1” or port latch is logic “0”’.
The “very weak” pull-up is turned on when the port latch is logic “1”. If port latch is logic “0”, it will be
turned off. The very weak pull-up is support a very small current that will pull the pin high if it is left
floating. And the quasi-bidirectional port configuration is shown as below figure.
If port pin is low, it can drives large sink current for output, and it is similar with push-pull and open
drain on sink current output.
Port Pin
2 CPU
Clock Delay
Input Data
Port Latch
Data
P
P
P
N
VDD
Strong
Very
Weak
Weak
Figure
20-2: Quasi-Bidirectional Output
20.2 Open Drain Output Configuration
To configure this mode is turned off all pull-ups. If used similar as a logic output, the port must has an
external pull-up resister. The open drain port configuration is shown as below.
Port Pin
Port Latch
Data
N
Input Data
Figure
20-3: Open Drain Output
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| W79E802ADG | 8-BIT MICROCONTROLLER |
| W79E802ASG | 8-BIT MICROCONTROLLER |
| W79E803 | 8-BIT MICROCONTROLLER |
| W79E803A | 8-BIT MICROCONTROLLER |
| W79E803ADG | 8-BIT MICROCONTROLLER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| W79E802ADG | 制造商:WINBOND 制造商全稱(chēng):Winbond 功能描述:8-BIT MICROCONTROLLER |
| W79E802ASG | 制造商:WINBOND 制造商全稱(chēng):Winbond 功能描述:8-BIT MICROCONTROLLER |
| W79E803 | 制造商:WINBOND 制造商全稱(chēng):Winbond 功能描述:8-BIT MICROCONTROLLER |
| W79E803A | 制造商:WINBOND 制造商全稱(chēng):Winbond 功能描述:8-BIT MICROCONTROLLER |
| W79E803ADG | 制造商:WINBOND 制造商全稱(chēng):Winbond 功能描述:8-BIT MICROCONTROLLER |
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