Contents
What is input pin and output pin?
An input/output pin, or I/O pin, is the interface between a microcontroller and another circuit. It can be configured in the microcontroller’s software to be either an input or an output. When configured as an output pin, a pin provides VDD or 0V to whatever is connected to it (if anything).
What is input and output in microcontroller?
A microcontroller can sense the world through its input pins. Input pins are either digital or analog. Digital inputs are the opposite of digital outputs – they expect to be set to either 0 or 5 volts by some external device. For each digital input there is a bit in the microcontroller’s memory that reflects its value.
What is pin in microcontroller?
Pin 9 − It is a RESET pin, which is used to reset the microcontroller to its initial values. Pins 10 to 17 − These pins are known as Port 3. This port serves some functions like interrupts, timer input, control signals, serial communication signals RxD and TxD, etc.
When is a microcontroller pin configured as an output?
This section describes the basic characteristics of a microcontroller I/O pin when it is configured as a digital input. Most of a microcontroller’s I/O pins can be configured as an output or an input. Part 2 described the basics when a pin is configured as an output.
Which is the simplest input / output mode for a microcontroller?
The Stratify Toolbox is a printf ()-ing awesome debug tool! Check it Out! GPIO (aka General Purpose input/output) is the simplest of microcontroller IO. Even so, GPIO comes in various types and varieties. There is input, output, pull-up, pull-down, push-pull, high-drive, open-drain, and more.
What does GPIO mean in a microcontroller?
Anyone who writes software for microcontrollers will have to configure and manage general purpose input/output ( GPIO) pins. On their surface, GPIO configuration seems simple: pins are input or output, and they can be high or low.
What should the port direction be on a microcontroller?
You need your program to set up the port direction registers as an early step when power is applied to the chip or it comes out of reset. I/O pins are usually configured in groups of 8 bit I/O ports. The program can read the port and will get a value between 0 and 255 depending on the states of the input pins.