dumb question

[osceola]

Hi guys,
Im working on a project and have a very dumb question:
Can a eeprom be programed to store data from an F2F decoder?So in the schematic will be only F2F decoder and eeprom?And data will be downloaded from there in a second time using another software?

[Melanie]

An EEPROM has no intelligence - it cannot act on it's own.

An F2F Decoder has no intelligence - it cannot act on it's own.

Yes, an EEPROM can store the Data from your F2F Decoder, but you need some controlling intelligence to accomplish the task. So you need (typically) a microprocessor (eg a PIC) somewhere in the equation.

[osceola]

Thank you Melanie for your answer,very kind of you.Another question then,can you program an eeprom to do that and exclude the pic from ecuation or not?

[mackrackit]

Like Melanie said.
An EEPROM can not act on it's own. You need something to give it instructions. It is just a storage device. Like a hard drive. Alone it is not much good.

[osceola]

ok,thank you,got it now.witch will be the best 512kb EEPROM to use?24C512 or 24LC512?whats the diference between these 2?and also witch will be the 8pin based best PIC to use?12F675 or 12F683?Or you recomend something else?Thank you

[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.