dumb question

[Melanie]

You must chose a PIC with enough pins for your F2F devices, two pins for the EEPROM (C or LC still require two lines regardless which one you chose), and however many additional pins for external communications or other connections. Remember one of the pins on the 12F675/683 is INPUT ONLY that leaves five I/O's. If you are going to use Serial Communications (like RS232) then you WILL need a Crystal or Resonator, that will use up two pins, and three I/O's may then be insufficient for your needs.

As regarding EEPROMS... the 'C' device is a plain SERIAL device requiring something like SHIFTIN/SHIFTOUT usage, whereas the 'LC' is an I2C BUS device requiring I2CWRITE/I2CREAD usage.

[osceola]

Thank you Melanie for your answer I got it now.Where can I find a schematic or something to test that,or who could give me an advice on how to built this?

[osceola]

No one wants to help me?

[mackrackit]

Which way do you want to go?

If you go with the I2C method then take a look at the PBP manual. There is enough information there to get you started.

The section in the manual about shiftin/out along with a data sheet will also get you started in that direction.

Let us know the parts you plan on using.

[osceola]

Well,first I need a schematic,and I also would like to know if the F2F decoding can be done inside a PIC(16f628, 16f84 etc.) to make it as simply is posibile.So,can the F2F decoding be done inside a pic and witch series of EEPROM to use for that,24C512 or 24LC512?

[osceola]

Could anyone provide me a schematic of this or help me find it?

[mackrackit]

Have you read the data sheet for the F2F part you plan to use?

[mackrackit]

Melanie already answered this...

As regarding EEPROMS... the 'C' device is a plain SERIAL device requiring something like SHIFTIN/SHIFTOUT usage, whereas the 'LC' is an I2C BUS device requiring I2CWRITE/I2CREAD usage.

Look at the last few pages of the PIC's data sheet. The info you seek is there
a differance in package, some like surface, some like dips.

[osceola]

So can I order any of these PICs mentioned?And I will look what EEPROM I can find.Interfacing PIC with EEPROM and in the schematic need also some resistors and capacitors?witch one and how many?Thanks

[Melanie]

EEPROM Schematic Information and example code is contained in your MeLabs PBP Manual that came with your PICBasic compiler.

[mackrackit]

Just curious...
Is this your first project?

[osceola]

I ordered the Pic Kit 2 already,have to get it this days,and yes,this is my first project and any help from you will be apreciated,so sory if sometime(or always?) I make some dumb questions

[mackrackit]

Do not worry about the questions. Everyone has to get started.
Now do not take this the wrong way, but this project might be a little advanced for a first project. Like anything else, you need to work your way up.

When you order the PIC make sure it is a DIP package. That way it can be plugged into a breadboard. The same goes for the EEPROM.

When the PICKIT comes let's work on a simple what we call "blinkey". That is a program that will simply blink a LED at a given rate. What this will do is make sure you understand how to set everything up. Then we can move on to more advanced things.

In the mean time. Read everything you can on this forum. Study the data sheets for the parts you plan to use.

In no time this project will be up and running and you will understand what is going on.