Hehe, it's funny you mention that, I had almost the exactly opposite reaction lately. I've been working with the 16F877 on a different project for a while and when I picked up the 16F84 datasheet I couldn't BELIEVE how much was missing!! The register description section is so short, all the diagrams feel so short and small! Then I looked at the 16F628 datasheet and I said to myself "now THIS is more like it!" :) I'm kinda surprised it took Mchip this long to come out with such a nice chip (heck flash parts are relatively new aside from the 16x84). Btu on the other side the 16F84 has alot fewer "gotchas", especially when setting up the chip (I remember with the 16F877 looking through every pins description to make sure I hadn't missed something, like disabling the ADC for that pin, etc.). Simplicity does have it's virtues. TTYL > -----Original Message----- > From: pic microcontroller discussion list > [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of John Ferrell > Sent: Thursday, August 09, 2001 15:38 > To: PICLIST@MITVMA.MIT.EDU > Subject: Re: [PIC]: Building a Servo > > > Speaking as one who is on the leading edge of the learning curve, > something > with training wheels would be good. No doubt about it, there is more > information and help available for the 16F84 than anything else. It is the > best place to start. I bought these and some 16F874's to start with and I > doubt I will need any thing else until some of the clouds clear. > > I looked at the datasheet on the 16F628 and decided it best to > wait a while > for that one! > > John Ferrell > 6241 Phillippi Rd > Julian NC 27283 > Phone: (336)685-9606 > Dixie Competition Products > NSRCA 479 AMA 4190 W8CCW > "My Competition is Not My Enemy" > > > > ----- Original Message ----- > From: "Byron A Jeff" > To: > Sent: Thursday, August 09, 2001 2:56 PM > Subject: Re: [PIC]: Building a Servo > > > > On Fri, Aug 10, 2001 at 03:44:21AM +1000, Roman Black wrote: > > > Herbert Graf wrote: > > > > > > > > That's the plan, I'm actually going to do three channels and for > simplicity > > > > I plan to use a seperate PIC for each channel with the same > basic code > (the > > > > differences in code will be due to the complexity of the control > needed (ie. > > > > some will have position feedback, others won't) and the motor being > driven > > > > (using a stepper on one channel and DC motors on the other > two)). TTYL > > > > > > Hi Herbert, first, i'm with you on the 16F84 issue, > > > I have hundreds of them and use them for anything > > > I want to whip up quick, whether "too simple" for > > > a 16F84 or "too complex" for a 16F84. The fact that > > > I have the chips, the boards, and many code projects > > > with register setups completed makes it easier to use > > > the chips you always use. You don't have to explain > > > WHY you're using a 16F84. :o) > > > > As one of the advocates of the new parts, I'd like to explain that the > > suggestion really isn't directed to the old hats on the list. > I'll usually > > throw in my two cents when I see a post that starts with "I'm starting > > out with PIC and I have some questions about the 16[CF]84[A]." > > > > Most of the time those folks simple do not have enough exposure > to realize > > that there are newer/faster/bigger/cheaper/more fully featured parts out > there. > > They think 16F84 because the vast majority of pages and > projects out there > > specify the part. > > > > If you're starting out there's simply no comparison. Simply from price > alone > > the part is the winner. Just looked up on Digikey for 25 part quantity: > > > > 16F628: $55 > > 16F872: $70 > > 16F84A: $92 > > > > All for the 20 Mhz part. > > > > And since the 16F628 has an internal 4MHz oscillator it gets > even cheaper > > for timing insensitive applications. BTW I noticed that the 4 MHz parts > were > > only pennies cheaper (14 to be exact at the 25 part price), > that little is > > lost buying on 20 Mhz parts. > > > > Everyone that's taken a spin around the block knows all the > strengths and > > limitations of each of the part subfamilies. And of course if > you'd got em > > and they can do the app, use them. > > > > But I think we'd be remiss as good PICLIST citizens not to inform > newcomers > > about the advantages of the latest technology. > > > > BAJ > > > > -- > > http://www.piclist.com hint: To leave the PICList > > mailto:piclist-unsubscribe-request@mitvma.mit.edu > > > > > > -- > http://www.piclist.com hint: To leave the PICList > mailto:piclist-unsubscribe-request@mitvma.mit.edu > > > -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu