Why do we need an infinite loop at the end of the program? Setup clr.w R4 ;clear

Question

Why do we need an infinite loop at the end of the program?

Setup clr.w R4 ;clear all old registers from

clr.w R5 clr.w R6

clr.w R7 clr.w R10

mov.w #04, R4 ;set up registered values

mov.w #05, R5

mov.w #07,

R6 mov.w #15,R10

Addition mov.w R4, R7 ;add R4 to R7 = 4

add.w R5, R7 ;add R5 to R7 = 9

add.w R6, R7 ; add R6 to R7 = 16

Subtraction sub.w R10, R7 ; subtract R10 from R7 = 1

Store mov.w R4, &0200h

mov.w R5, &0202h

mov.w R6, &0204h

mov.w R10, &0206h

mov.w R7, &0208h

Mainloop jmp Mainloop ; Infinite Loop

Explanation / Answer

Once the code is executed completely, the processor or microcontroller has nothing to do and will be idle. So to make it busy with some work, we put an infinite loop at the end.

This infinite loop will tell the processor to stay at that line forever.

This is common practice for the functions which do not return a particular value to end the program.

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