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8085 program for pulse waveform
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.
Updated on: 30-Jul-2019
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