8085 program for pulse waveform

MicroprocessorMicrocontroller8085

Now let us see a program of Intel 8085 Microprocessor. In this program we will see how to generate pulse waveform.

Problem Statement:

Write 8085 Assembly language program to generate continuous square wave.

Discussion

To generate square wave with 8085, we will rotate 10101010 (AAH) continuously. We have to send D0 as output. We will mask the accumulator content by 01H. If this is 0, then output will be 0, if it is 1, output will be 1, thus the pulse will be generated.

Input

No input is given in this case

Flow Diagram

 

program

Address
HEX Codes
Labels
Mnemonics
Comments
8000
16, AA
 
MVI D,AAH
Load 10101010 into D
8002
7A
ROTATE
MOV A,D
Load D to A
8003
07
 
RLC
Rotate A to the left
8004
57
 
MOV D,A
Store A into D again
8005
E6, 01
 
ANI 01H
Mask A with 01H
8007
D3, 10
 
OUT 10H
Send output to port 10
8009
C3, 02, 80
 
JMP ROTATE
Jump to ROTATE for next phase

 

Output

Square wave is generated as output at the output port.

 

raja
Published on 11-Jun-2019 10:37:48
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