PIC18F4520 connection to 3x3 keypad/LED

[defty]

Hello guys, I would appreciate some help regarding PIC18F4520 to 3x3 KP/LED.

I do not need the code as of now. I just need some basic diagram that shows how a 3x3 KeyPad is connected to the PIC and also how an LED can be connected to the PIC.
Is there any difference if I were to connect my 3x3 to either PORTA/PORTB?

I tried to google 3x3 KeyPad to PIC18F4520, nothing came out to be honest. Need some help if its possible. Thanks.

 

[wp100]

Hi,

Have a look at these tutorials to see how its done - loads of others out there..

http://www.winpicprog.co.uk/pic_tutorial9.htm

 

[jayanth.devarayanadurga]

Ther eis no special Keypad interfacing to PIC18F4520. Google for 3 X 3 Keypad interfacing and you will get a lot of links. For LED use a current limiting resistor. If you use PORTA which have adc and Comparator functions multiplexed you have to configure ADCON1 and CMCON registers in your code.

 

[greentree]

- - - Updated - - -

Hi dear...
in a new way you can use many keys with one pin of pic...and so you can make your key-pad as you wish...

 

[prabaei]

hey, check these before proceeding..sure they helps.

https://embedded-lab.com/blog/?p=3428
https://embedded-lab.com/blog/?p=1761
https://embedded-lab.com/blog/?p=1812