When the user toggles the switch to Position 1, the pin connects to VDD through resistor R5, and the pinbit is one, regardless of the value of the port bit.
当使用者钳位开关到位置1时，管脚通过电阻r 5连接到VDD，管脚位为1，不论端口位是什么值。
2
Sometimes you feel that it's enveloping you too tightly it's smothering you and you want to Pierce it with a pin no matter what... Even if a tiny hole opens! At least you could breathe a bit then.