看芯片手册说IO2、IO8和IO9三个是启动相关的引脚,FLASH启动时,三者上电时为1、X、1,而下载模式时,三者上电是1、1、0。
在官方的DevKitC开发板中,IO8是外接电阻上拉了的,IO9是内部上拉了,但是没有看到对IO2进行的任何操作,可是按理来说IO2也应该接一个上拉才对呀,保持浮空不会出问题吗,有没有人试过?
Search found 2 matches
- Fri Dec 24, 2021 7:33 am
- Forum: 硬件问题讨论
- Topic: ESP32-C3 的IO2应该怎么处理
- Replies: 1
- Views: 7638
- Fri Dec 24, 2021 7:25 am
- Forum: General Discussion
- Topic: Strapping pins (vz GPIO2) on C3
- Replies: 3
- Views: 10855
Re: Strapping pins (vz GPIO2) on C3
What you said is What excatly I am worried about. There is little descrition about IO2 in the guideline and I do not see IO2 be pulled up or down in the schematic of the official deckitC. I want to have a Automatic Download Circuit in my design so I think it is better to pulled up the IO2 to make su...