Post by thread:Requirments for 16F84 programmers

I recently ordered a couple of 16F84 to attempt my first PIC project. JDR sent me 10mhz version instead of 4. I plan to breadboard then build a simple programmer. My question is: will simple programmers like david Tait's work with the 10mhz clock speed. I have spent some time on the web looking for an anwser, but it's not spelled out anywhere. Thanks. ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

Cranston Grey wrote: > > I recently ordered a couple of 16F84 to attempt my first PIC project. > JDR sent me 10mhz version instead of 4. I plan to breadboard then build > a simple programmer. > > My question is: will simple programmers like david Tait's work with the > 10mhz clock speed. I have spent some time on the web looking for an > anwser, but it's not spelled out anywhere. Yes they will program ok. Don McKenzie spam_OUTdonTakeThisOuTdontronics.com http://www.dontronics.com Don's Download Dungeon: http://www.dontronics.com/download.html For more details, send a blank message to .....infoKILLspam@spam@dontronics.com or simstickKILLspamdontronics.com or .....basicsKILLspam.....dontronics.com

Yes it will program it. The 10 mhz is the max freq the part is quaranteed to work at. Cranston Grey wrote: {Quote hidden}> I recently ordered a couple of 16F84 to attempt my first PIC project. > JDR sent me 10mhz version instead of 4. I plan to breadboard then build > a simple programmer. > > My question is: will simple programmers like david Tait's work with the > 10mhz clock speed. I have spent some time on the web looking for an > anwser, but it's not spelled out anywhere. > > Thanks. > > ______________________________________________________ > Get Your Private, Free Email at http://www.hotmail.com -- From: Ron Russ EMICROS - Embedded Micro Software (http://www.emicros.com) CANPORT - Lowest cost PC to Controller Area Network Adapter (http://www.emicros.com/canport.htm) CANTEC11 - 68HC11 SBC with Controller Area Network (http://www.emicros.com/cantec11.htm)

And yet another answer! All parts from production are potential 10MHz parts (as far as we can gather, and I've heard no-one from *any* company seriously refute this principle). They are tested, possibly individually but more likely by batch sampling, for performance and stamped accordingly as "4MHz", "10MHz" or whatever. It is *possible* that once enough "premium" devices have been allocated to market requirements, other components of equal performance are sold at a lesser specification. What this means is that there isn't *necessarily* any difference between a "4MHz" and a "10MHz" one. Some people test them at higher clock speeds again and if they feel their testing is adequate to cover the likely conditions, proceed to use them at the higher speed. It is axiomatic that a device which will work at a particular clock rate will work at *any* slower speed and you will note the PIC is characterised to DC clocking. This applies equally to programming. Cranston Grey wrote: > JDR sent me 10mhz version instead of 4. Which did they charge you for? You may be lucky! > My question is: will simple programmers like david Tait's work with > the 10mhz clock speed. The programmer doesn't use the clock; it provides its own. In fact, it works better *without* the clock (crystal) connected. > I have spent some time on the web looking for an anwser, but it's not > spelled out anywhere. It often happens. -- Cheers, Paul B.