Why are pins multiplexed?
A number of the available pins can be used for multiple purposes other than general purpose input/output when needed. Such pins are referred to as multiplexed pins. This is used to incorporate the largest number of protocol support in the smallest possible package. …
What is meant by pin multiplexing?
The i.MX System-On-Chip has a lot of functionality but a limited number of pins (or pads). Even though a single pin can only perform one function at a time, they can be configured internally to perform different functions. This is called pin multiplexing.
What is a GPIO MUX?
i2c-mux-gpio is an i2c mux driver providing access to I2C bus segments from a master I2C bus and a hardware MUX controlled through GPIO pins.
What is Pinmuxing?
PINMUX, also known as padmux, ballmux, alternate functions or mission modes is a way for chip vendors producing some kind of electrical packages to use a certain physical pin (ball, pad, finger, etc) for multiple mutually exclusive functions, depending on the application.
What is the purpose of a GPIO pin?
Stands for “General Purpose Input/Output.” GPIO is a type of pin found on an integrated circuit that does not have a specific function. While most pins have a dedicated purpose, such as sending a signal to a certain component, the function of a GPIO pin is customizable and can be controlled by software.
How is GPIO used in a switch button?
Example 7-1 gives an demonstration of using the GPIO API. First, it registers a pin listener for the GPIO input pin that a switch button is attached to. When the button is pressed, the listener is notified. The listener then turns the LED on or off by setting the GPIO output pin that the LED is attached to accordingly.
What are the methods of the GPIO interface?
The GPIOPin interface consists of the following methods: This method returns the current pin direction: GPIOPin.OUTPUT if this GPIO pin is currently set as output, or GPIOPin.INPUT if it is set as input. This method returns the current value of the GPIO pin. This method can be called on both output and input pins.
Can a GPIO pin be both analog and digital?
Is it possible that a single GPIO pin can act as both analog and digital? A GPIO pin is a ‘general purpose input/output’ pin. This is by default only high or low (voltage levels, high being the micro controller’s supply voltage, low usually being ground, or 0V).