You can see in the above diagram, GPIO2 and GPIO3 pins have fixed pull-up resistors but for the other pins, you can configure it in software. You can use internal pull-up or pull-down resistors. The pin set as input pin can be read as 3V3(high) or 0V(low). InputsĪ GPIO pin can be designated as an input pin. ![]() The pin set as output pin can be set to 3V3(high) or 0V(low). OutputsĪ GPIO pin can be designated as an output pin. One of the powerful features of the Raspberry Pi is the row of GPIO (general-purpose input output) pins and the GPIO Pinout is an interactive reference to these GPIO pins.įollowing diagram shows a 40-pin GPIO header, which is found on all the current Raspberry Pi boards −įrom the above diagram, we can see that there are two 5V pins and two 3V3 pins on the board. Here, we will learn about the GPIO (general-purpose input output) connector in Raspberry Pi.
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