PullupWiderstand
PullupWiderstand, often shortened to PULLUP, refers to a type of pull-up resistor used in digital electronics. A pull-up resistor is a resistor connected between a signal line and a positive power supply voltage. Its primary purpose is to ensure that a digital input pin is at a defined logical high state when no external device is actively driving the line to a low state. Without a pull-up resistor, the input pin would be "floating," meaning its voltage level would be undefined and susceptible to noise, leading to unpredictable behavior.
In many microcontroller and logic circuits, input pins are designed to be read as either a high
Internal pull-up resistors are commonly integrated into microcontrollers, simplifying circuit design by eliminating the need for