An interrupt is a signal that causes the microcontroller to stop its current execution and jump to a predefined function called an interrupt service routine (ISR).

The 8051-compatible microcontrollers are equipped with up to two inputs that may be used as general-purpose interrupts. A simple way to increase the number of interrupt inputs is shown in the figure .

This project implements an alphanumeric keypad, similar to the ones found in mobile phones, using an 8051 microcontroller. The system allows users to input alphanumeric characters and provides a ...

You can see amodel for the interrupt subroutine here. The codesets the microcontroller’s stack, register,ADC, Timer 2, and interrupt functions.To save image data, you must set the T bit in SREG to 1 ...

This Design Idea describes a methodfor reading multiple pushbuttons oropen/closed switches using only twodigital I/O pins and a timer interrupt ofthe MCU (Figure 1).Optionally, a thirdI/O pin can be ...