51单片机p0口上拉电阻

引用: 单片机IO口51的P0口没有上拉电阻，P1P2P3口都有，若要输出高电平必须外部接一个上拉电阻。根据引用内容可以得知，51单片机的P0口并没有内部上拉电阻。所以如果需要在P0口输出高电平，就需要外部连接一个上拉电阻。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
- *1* [51单片机P0端口的驱动能力、上拉电阻、限流电阻、下拉电阻](https://blog.csdn.net/qq_46136319/article/details/120922279)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_1"}}] [.reference_item style="max-width: 50%"]
- *2* *3* [51单片机笔记01](https://blog.csdn.net/Kudo_chitose/article/details/120643611)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_1"}}] [.reference_item style="max-width: 50%"]
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