falling-edge, rising-edge

Summary

They mean both 'transition'

and divided depending on direction of voltage

0 -> 1 : rising-edge

1 -> 0 : falling-edge

 

Description

"Falling-edge" and "rising-edge" are terms used in digital electronics to describe specific types of transitions in a digital signal. These transitions are important in various applications, such as triggering events, handling interrupts, and synchronizing digital circuits. Here's what each term means:

1. Rising-edge:
   • This refers to the transition of a digital signal from a low state (0) to a high state (1).
   • It's like the signal is "rising" from the ground (low voltage) to the sky (high voltage).
   • In many digital systems, this transition is used to trigger an event, such as capturing data, starting a timer, or generating an interrupt.
2. Falling-edge:
   • This is the opposite transition, where the signal goes from a high state (1) to a low state (0).
   • It's analogous to the signal "falling" from a high place to a low place.
   • Similar to the rising-edge, this transition is also used to trigger various events in electronic systems.

Both types of edges are crucial in timing-sensitive applications because they provide precise points in time when actions can be initiated. For instance, microcontrollers like the ESP32 can be configured to react to either a falling-edge or a rising-edge on a particular pin to perform tasks like reading sensor data or updating a status. This capability is often utilized in designing communication protocols, interfacing with other digital devices, and processing digital signals where accuracy and timing are critical.