What is this symbol in the circuit diagram?
![userHead](https://dfimg.dfrobot.com/dfPortrait2.png)
This is from the circuit diagram of DFR0654 and I found an unfamiliar symbol here.
Does anyone know what this symbol means??
I can't find it from any list of symbols for circuit diagram.
![](https://dfimg.dfrobot.com/65cb3964aa9508d63a437e1b/enshopforum/d832619e1230c4a0df0998a795c20c9c.png)
![](https://dfimg.dfrobot.com/65cb3964aa9508d63a437e1b/enshopforum/5177855e16540c1103c78cb101ecaca4.png)
![](https://dfimg.dfrobot.com/65cb3964aa9508d63a437e1b/enshopforum/33a056e5e50795b639a365f4222d1933.png)
This is from the circuit diagram of DFR0654 and I found an unfamiliar symbol here.
Does anyone know what this symbol means??
I can't find it from any list of symbols for circuit diagram.