On 11/27/09, William <[email protected]> wrote: > On Nov 26, 11:20 pm, vasile surducan <[email protected]> wrote: > > I want to merge the PCB design to PIC18F25J10, it looks the best > > Greetings Vasile, > > What is the desired footprint for your cpu? SOIC, PDIP, other? Sorry > if it is a dumb question.
Hi William&all There are two choices, SOIC or PDIP so you can solder rightnow any of those (that's why in the schematic you can see two PIC's). However, DIP is easier for soldering in this particular case of PCB with non conductive through hole vias because the empty part (not soldered one) needs manual vias connections for all signals which are switching the layer. > I was hoping we could choose different/various cpu, so long as the > footprint is compatible. Yes that's correct, we can choose from two different families with 28 pins because of the major differences in footprint. J series has a 2.5V built in LDO which need a filtering capacitor on pin6, meaning that pin can't be used for IO. However I've already modified schematics to accept both FJ or F parts (both supplied at 3.3V ) > Please tell me more about your choice of the PIC18F25J10, at the > moment, my favorite 28-pin is the 18F2585 (built-in CAN, 48KB flash, > 3328 byes RAM). Easy, the choice it's just the availability in this area and the good price. I will download the 18F2585 datasheet and check the compatibility. Right now I'm programming the new series of PICs with a pickit2 (if $50 is too much, there are many clones available, just search at edaboard.com for an 1:1 one), I'm not using any bottloader since the programming time (fast programming) is less or equal than bootloading via RS232 or USB. For me, botloader was just a faster way uf uploading the hex file, maybe I'm wrong (like my other ideeas about jallib libraries) People interested on this bare PCB, please study the schematic I have attached in the previous email and find the compatibility with your favourite PIC. Also add (or remove) possible features for the board. However please consider I have a very limited spare time and do not ask for a complete new configuration. :) Vasile -- You received this message because you are subscribed to the Google Groups "jallib" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/jallib?hl=en.
