I'm about to draw my first schematic, but the IC is not in the library!
The IC I'm using is a DIL40 PIC18F4520. The library has a PIC18F4550 which
has a similar layout for most pins.
What is the best plan??
--
Nigel M
If my question is about apples, please don't suggest bananas
Nigel Molesworth schrieb:
I'm about to draw my first schematic, but the IC is not in the library!
The IC I'm using is a DIL40 PIC18F4520. The library has a PIC18F4550 which
has a similar layout for most pins.
What is the best plan??
Congrats, you have the chance to edit your first library, which is the
other half of layouting 
Check the manual in the doc directory. What I would do:
1. From the Control panel(cp) create a new library (lib)and leave it OPEN.
2. In cp go to the desired lib, rightclick the device you want to modify
and select "copy to library". (Repeat with other packages / devices).
3. Save your new lib.
4. In the new lib EDIT the pin NAMES of the symbol according the datasheet.
5. CHANGE the DIRECTION of pins (I/O, in, out etc) according datasheet.
6. Rename the symbol.
7. Create a NEW device and name it.
8. ADD your new symbol to the device.
9. With "New" (bottom right) select a package for that device.
10. CONNECT the Pins of the symbol to the Pads of the package.
11. Save the lib and close it. With USE (your lib) you have the lib
available in your schematics.
If that is your first own library, I would do it with an eight pin
fantasy device first, to understand the handling.
And do not forget, there is allways the F1 key
--
Gruß
Jörn
