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Interfacing of Seven segment display with 8085 microprocessor
Aim: Interfacing of Seven segment display with 8085 microprocessor.
Requirements: 8085 Microprocessor kit, Seven Segment LED & wires.
Learning Objectives: Interfacing of seen segment using 8255.
Outline of the Procedure:
1. Connect the circuit as shown in the below diagram
2. Turn on the kit.
3. Write the given code.
4. Execute the code and verify the results on seven segment display.
 
Circuit Diagram:
 
 
 
Program:
 
MVI A, 80H
OUT CR
K: LXI H, 2000H
MVI B, 10H
KK: MOV A, M
OUT PA
JMP DELAY
INX H
JNZ KK
JMP K
HLT
Delay: LXI D, Count
Back: DCX D
MOV A, D
ORA E
JNZ Back
RET
 
Inputs:
2000: 40H, 79H, 24H, 30H, 19H, 12H, 02H, 78H, 00H, 18H, 08H, 03H, 46H, 21H, 06H, 0EH
 
Result:
On the Seven segment LED we can see all the Hexadecimal no’s displayed with some delay as mentioned.
 
Learning outcomes: to be written by the students in 50-70 words.

 

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