One wire in PIC16F84A

[briantk_1988]

Thanks a lot for replying me.

I'm trying to make a simple calculator. As far as I am concerned, an LCD display requires 6 pins from the microcontroler, a simplest keypad needs 8 more pins --> we need at least 14 IO pins which is impossible for an PIC16F84A. Unfortunately, since I haven't a clue about microcontroler before, I just though everything was the same which made me I got the PIC16F84A. Now, I'm thinking that I might use one PIC6F84A for the keypad and then use one wire interface to transmiss the information to the other one which will manipulate the data and then display in the LCD. I did read the onewire example in MikroBasic but it's not satifiable, for the example is just for getting data from a themometer (DS1820). Furthermore, I think that I don't need a very high speed to do this task. Also, I'm just a novice, I have a very humble idea about interface protocol/standard. So, if anyone have any idea about what i gotta do, I'm very grateful to know.

Thanks in advance