High impedance (High-Z, Hi-Z) pin -A pin that is characterized by having a high impedance which effectively removes its influence on the electrical circuit it is connected to. In order to explain the specifics of each output configuration, we must first introduce the following terms: In this article, we will cover the most common types of output configurations and their applications. Choosing the proper pin configuration is an important part of designing an embedded system. This circuitry (usually called a pad) can be configured to allow the pin to interface with different types of digital and analog circuits. Behind each pin (inside the IC) there is a special circuitry used for driving it. In general, the pins are the physical points on the package of an integrated circuit (IC) where a connection can be made to the printed circuit board. Microcontrollers use pins for interfacing with the outside world.
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