MICROPROCESSOR AND MICROCONTROLLER

Detailed explanation-1: -When using a loop to create the time delay, there are three factors that can affect the accuracy of the time delay. They are: (i) Crystal frequency of the 8051 system, (ii) 8051 machine cycle timing and (iii) Compiler used for 8051 C.

Detailed explanation-2: -We can provide Delay in 8051 micro-controller by using “MOV” instructions and by using timer. Here we describe the procedure for Delay using “MOV” instruction. This piece of subroutine will provide delay in seconds. Amount of Delay which will be provided by this code depends on the content of R3, R2, R1.

Detailed explanation-3: -Generation of time delay is most important concept in embedded systems. Most of the times, we need to generate precise time delay between two actions in any microcontroller applications. We can generate the time delay using the techniques like LOOPs or by using in built delay functions.

Detailed explanation-4: -The 8051 design. The crystal frequency connected to the XI – X2 input pins. Compiler choice.