The delay will be used in different places to simulate clocks, or counters or some other area. When the delay subroutine is executed, the microprocessor does not execute other tasks . For the delay we are using the instruction execution times. executing some instructions in a loop, the delay is generated.
What is delay in microprocessor?
There are different places where the delay will be used. The processor doesn’t execute other tasks when the delay subroutine is executed. The execution times are used for the delay. The delay is generated when the instructions are executed in a loop .
What do you mean by subroutine in 8085?
In computers, a subroutine is a sequence of program instructions that perform a specific task, packaged as a unit . This unit can then be used in programs wherever that particular task have to be performed.
What do you mean by subroutine?
In computer programming, a subroutine is a sequence of program instructions that performs a specific task, packaged as a unit . ... In different programming languages, a subroutine may be called a routine, subprogram, function, method, or procedure.
What is subroutine explain with example?
A routine or subroutine, also referred to as a function, procedure, method, and subprogram, is code called and executed anywhere in a program. For example, a routine may be used to save a file or display the time.
What are the types of subroutine?
- procedures.
- functions.
What are the advantages of subroutine?
- Subroutines make programs shorter as well as easier to read and understand, because they break program code into smaller sections.
- You can test procedures or functions separately, rather than having to test the whole program.
Why delay is used in microprocessor?
The delay will be used in different places to simulate clocks, or counters or some other area. When the delay subroutine is executed, the microprocessor does not execute other tasks . ... executing some instructions in a loop, the delay is generated.
What is delay routine?
Delay routines are subroutines used for maintaining the timings of various operations in microprocessor . In control applications, certain equipment needs to be ON/OFF after a specified time delay. In some applications, a certain operation has to be repeated after a specified time interval.
What is the need of counter and time delay in microprocessor?
What are Counters & Time Delays ? COUNTERS ARE USED TO KEEP TRACK OF EVENTS . TIME DELAYS ARE IMPORTANT IN SETTING UP REASONABLY ACCURATE TIMING BETWEEN TWO EVENTS.
What happens when a subroutine is called?
When a subroutine is called, program control is transferred from the main program to the subroutine . When the subroutine finishes executing, control is returned to the main program. The stack provides the means of connecting the subroutines to the main program.
What is a subroutine answer?
ans ) In computer programming, a subroutine is a sequence of program instructions that performs a specific task, packaged as a unit . This unit can then be used in programs wherever that particular task should be performed.
What is difference between function and subroutine?
Functions and subroutines operate similarly but have one key difference. A function is used when a value is returned to the calling routine, while a subroutine is used when a desired task is needed, but no value is returned.
What is the purpose of subroutine register?
4.2 Register usage in subroutine calls
A subroutine is a block of code that performs a task based on some arguments and optionally returns a result . By convention, you use registers R0 to R3 to pass arguments to subroutines, and R0 to pass a result back to the callers.
How do you write a subroutine?
- You do not need to declare the subroutine name in the main program as you do with a function name.
- They begin with a line that includes the word SUBROUTINE, the name of the subroutine, and the arguments for the subroutine.
What is subroutine call and return?
The CALL instruction interrupts the flow of a program by passing control to an internal or external subroutine. An external subroutine is another program. ... The RETURN instruction returns control from a subroutine back to the calling program and optionally returns a value.
