Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

can 8255 interfacing with led without using 8051

Status
Not open for further replies.
P

pradeep23

Member level 5
Joined
Aug 20, 2012
Messages
86
Helped
3
Reputation
6
Reaction score
2
Trophy points
1,288
Activity points
1,866
hello i am doing one project can 8255 interface without using 8051 IC.....is it possible to that ....just by using the ic 8255 we can interface with led and without programs
 

pradeep23 said:
hello i am doing one project can 8255 interface without using 8051 IC.....is it possible to that ....just by using the ic 8255 we can interface with led and without programs
Click to expand...

The answer is NO
To activate a pin as output you have to send a series of commands to the status register via D0-D7 using also control pins such as CS, WR, RD etc.
How are you going to do that without a microcontroller or huge circuitry with switches, gates and timers????

:wink:
IanP
 
  • Like
Reactions: DrWhoF

    D

    DrWhoF

    Points: 2
    Helpful Answer Positive Rating
pradeep23 said:
hello i am doing one project can 8255 interface without using 8051 IC...
Click to expand...

Hi;
I agree with IanP, and you do not have to stick with the 8051, you can use a PIC for example, just does not make much sense because they already contain I/O ports and almost all PIC has an "On Change Interrupt" feature like the 8255.
 
Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top