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MA803AS2 Datasheet(PDF) 21 Page - Megawin Technology Co., Ltd |
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MA803AS2 Datasheet(HTML) 21 Page - Megawin Technology Co., Ltd |
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21 / 75 page  This document information is the intellectual property of Megawin Technology. © Megawin Technology Co., Ltd. 2009 All rights reserved. QP-7300-03D 21/75 MEGAWIN MAKE YOU WIN MA803 Port Pin Strong Input data Port latch data VDD 9.1.3. 仅输入(高阻输入) 仅输入模式在引脚上没有任何上拉电阻，如下图所示。 图 10-3 仅输入 Port Pin Input data 9.1.4. 开漏集输出 配置为开漏输出时，当端口寄存器包含逻辑 0 时，关闭所有上拉，只有端口引脚的下拉晶体管。使用这个功能配 置应用，端口引脚必须有外部上拉，典型的将电阻接到 VDD。这个模式的下拉和准双向端口的模式相同。另外，在这 种配置下的端口输入引脚的输入路径和准双向模式相同。 开漏输出端口配置如图 10-2 所示。 图 10-4 开漏集输出 |
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