I'm asking about the third possibility. In my case I've got CS8900A on board ( ethernet part ) and PIC18F8621. PIC works grand but CS doesn't even start. Chip is OK. My guess is that I placed power circuit on PCB badly. So my questions are: - how thick should be power and gnd paths - what decoupling capacitors should I use - how should be decoupling capacitors placed - how distance between paths influence signal integrity Basically I'm looking for some reference about it. I did look on internet and I found some resources but some of them tell different things. I'm looking for opinion from somebody experienced who maybe know a good book ( or a website ) on this topic that he would recommend. Regards, Sam Quoting Wouter van Ooijen : >> Recently I designed a board and sent it away to manufacture. >> After it was soldered I discovered that not all components work. >> Do you know any "good" literature about designing PCBs? > > What was your problem? > - the circuit : use simulation software and/or build your circuit on a > (solderless) breadboard first > - the PCB did not reflect the circuit : use a tool that warns you when > circuit and PCB do not agree (I like eagle) > - the PCB layout affects your circuit : that's the difficult one. there > is a lot to say about this, specifying your specific problem might help > others (who are more knowledgeable than me) to recommend a book. > > Wouter van Ooijen > > -- ------------------------------------------- > Van Ooijen Technische Informatica: www.voti.nl > consultancy, development, PICmicro products > docent Hogeschool van Utrecht: www.voti.nl/hvu > > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist