| PIC PRESS HELP | PIC Selection |
Your choice of PIC will depend on a number of aspects of your project, and it is important to make a choice early on, to avoid having to start again.
One of the first things you should do is draw a circuit diagram of your project, looking in particular at how many inputs and outputs you will need to connect to the PIC. For example if you are using a seven segment display to count the number of times a push button has been pressed, you will count:
In this case a total of 8 input/ouput (or I/O) pins will be required, so you will have to choose a PIC with at least these many (e.g. the P12C508 is out of the question).
The second step in your choice of PIC is choosing which features you require. If you need to read an analogue signal into the PIC, you may well need an A/D converter. Do you need an EEPROM? Are you going to need many file registers, if so can you use RAM? Are you going to need, or be helped by interrupts? To find out more about the PICs supported by PIC PRESS, click here.