I have changed my ICSP schematic many times to try to suit others. No matter what I do, someone will not be happy. As you can see, nobody can agree one one schematic and I am still having trouble!
The schematics from Microchip do not show a reset button, I think a reset button is useful. If there is no reset button, you will need to reset your circuit by disconnecting the power. Yes, there are other ways of resetting your circuit, but some users may not know that. Mike, thank you for your schematic which may be most correct, but I am looking for a simple/cheap schematic. At least yours had a reset button unlike all others :) I think the fault here is not the schematic, it is the programmer. Some programmers have not been created "to microchip standard", such as Wisp628 that needs VDD to power it's self. Can someone please show me a ICSP schematic with a reset button that is to Microchip standards that will work on PIC Kit 2? Matt. On Mar 27, 8:50 am, vasile surducan <[email protected]> wrote: > On Fri, Mar 26, 2010 at 1:14 PM, Joep Suijs <[email protected]> wrote: > > > Actually if you have a capacitor, it must be isolated by the diode, as > > > shown on Microchip schematic, otherwise Vpp rise from +5V to +13V and > > > drop from +13V to +5V can be too slow on some programmers. > > > > It's a 2c part. > > > > My circuit is correct. While simpler circuits will mostly work, it's > > > the "proper" solution, > > > Again, just a 47k resistor will do nicely too. > > Absolutely. With possible problem that sometimes will not give resets. In > this situation the reset spike is given by the parasitical capacitance of > MCLR. Taken from old memories, the MCLR pin has a few pF and this capacity > depends by microcontroller package. > > I really don't care if a new user will have or not problems with a circuit > designed by someone else than me, in fact for hobby is quite indicate to let > the user to discover the best solution for various problems he/she face it > (read as "this circuit contain a known mistake, you should discover it). > > To avoid such "constructive" discussion on theme as ICSP, probably will be > best to use in schematics which are intended to beginners (jalluino lovers) > the recommended s**t of Microchip. So Mike, you are the winner. However for > Matt does not have any impact our discussion here, is just a way of wasting > some time, because everything must be repeated three or four times, and the > schematic looks the same like it was at the beginning of our discussion. > :) > > 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.
