# Button

BPI G1 has a button, which is connected to the PB3 pin F103, in the middle of a pullup resistor in parallel, when the key is pressed, the pin will be low-level information. Figure.

![](https://3328098389-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-M2HWtR1ORXGh8cjr34f%2F-M2HWvRKw6XOIl6BxR3U%2F-M2HXLVpWz_eXgBgNklU%2Fconnect%207.png?generation=1584080203932965\&alt=media)