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???
10/18/06 21:20
Modified:
  10/18/06 21:25
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 		 #126704 - Well, show me ... it\'s proven untrue so far.
Responding to: ???'s previous message
Erik Malund said:
Richard Erlacher said:
Well, since I'm build three of something, I'm using a COTS board rather than having someone build a hundred for me. The result is that (a) I have to use the MCU that's on the board, and (2) it has to have sufficient prototype area so I can put on the hardware that I need, because most boards don't have it.


nope, there are plenty of boards with (sorry, I know you hate this) modern uCs, you just have to select which prefabricated board you use. For instance EVERY SILabs chip is available on a reasonably priced dev/protoboard. (OK that is incorrect only the highest performer in a family is). Two years or so ago SILabs (or is it so long ago that it was Cygnal?) announced that they had sold 10.000 of the devboards, so this is not an 'exotic' idea.


to what are you saying "nope," here?

I've looked at SiLabs' boards and, if any of them were competitively priced and had a sufficient prototype area on them, I'd have some of them in house. I don't.

Erik Malund said:
Richard Erlacher said:

I did read it, as far as where it said you couldn't transfer data any faster than ~100kBps. I submit that you, with your 100 MIPS MCU, could certainly do that if you wrote the code in anything other than the slowest most clumsy way conceivable.

Sure, but you keep referring to a 'standard' '51 so is it that only you are allowed to do so???. If I were to use "your 100 MIPS MCU" I would be off my rocker to use a slowpoke interface chip. You accuse me of unprofessionally use a "too fast, too expensive" CPU, you would be correct if I were STUPID enough to interface such an uC with an 8255. THUS, your statement "with your 100 MIPS MCU" is utterly ridiculous.

Erik


By standard, I'm referring to the package, since what lives in the standard package will plug into nearly any standard application.

It's clear that you don't do standard parallel interfaces much, else you wouldn't spout such drivel. Until you have to do that, you'll get by with what you do now, I guess. That's fine with me.

RE


List of 174 messages in thread
TopicAuthorDate
How to extend the ports of 8051?            01/01/70 00:00      
   I2C, SPI, 1-Wire, CPLD            01/01/70 00:00      
      Why "avoid 8259"?            01/01/70 00:00      
         Why "avoid 8259"?            01/01/70 00:00      
            Hi            01/01/70 00:00      
         Hi            01/01/70 00:00      
      Examples            01/01/70 00:00      
   Choose an 8051 w. sufficient IO in the 1st place!            01/01/70 00:00      
      all 8051\'s have the same amount of I/O            01/01/70 00:00      
         list please            01/01/70 00:00      
            typo ... sorry ...            01/01/70 00:00      
         OK then, "derivative"            01/01/70 00:00      
         huh?            01/01/70 00:00      
            I think he means...            01/01/70 00:00      
               you're right, and that's the point, actually            01/01/70 00:00      
                  cause and effect            01/01/70 00:00      
   Clarification please            01/01/70 00:00      
      Clarification            01/01/70 00:00      
         Hi            01/01/70 00:00      
            Specifics ?            01/01/70 00:00      
      Hi            01/01/70 00:00      
   8255            01/01/70 00:00      
      Avoid 8255!            01/01/70 00:00      
         8255 Is Available in India            01/01/70 00:00      
            I learned the 8085 and 8255 in college            01/01/70 00:00      
               more number blindness?            01/01/70 00:00      
                  Yes            01/01/70 00:00      
                     Actually, it IS possible ... but you\'re right            01/01/70 00:00      
                        why?            01/01/70 00:00      
                        who said useless?            01/01/70 00:00      
            so the blind should lead the deaf?            01/01/70 00:00      
               somebody's got to do it!            01/01/70 00:00      
         What do you mean by "cumbersome?"            01/01/70 00:00      
      which antique store do you shop at?            01/01/70 00:00      
   FAQ            01/01/70 00:00      
      now THAT would be helpful to many!            01/01/70 00:00      
         nobody said so            01/01/70 00:00      
            too slow?            01/01/70 00:00      
               if you want a FAQ ...            01/01/70 00:00      
                  Input or Output            01/01/70 00:00      
                     Well ... the Motorola parts did that ... bitwise            01/01/70 00:00      
                        Port C            01/01/70 00:00      
   Hi Everyboody!            01/01/70 00:00      
   Port I/O of 8051            01/01/70 00:00      
      Serial and parallel I/O            01/01/70 00:00      
         As many as two?!            01/01/70 00:00      
            port expansion            01/01/70 00:00      
               Oops - you've been in that museum again!            01/01/70 00:00      
                  that I know but            01/01/70 00:00      
                     sure            01/01/70 00:00      
                        i have not and I can't            01/01/70 00:00      
                           sorry...            01/01/70 00:00      
                     WSI; Waferscale; ST; PSM; PSD            01/01/70 00:00      
               wotizit?            01/01/70 00:00      
                  wired or line            01/01/70 00:00      
                     I'd not call it a "pin extension"...            01/01/70 00:00      
                        I would            01/01/70 00:00      
      Requirements            01/01/70 00:00      
      FAQ            01/01/70 00:00      
         a good start, but woefully incomplete            01/01/70 00:00      
            Triscend - now Zylogic            01/01/70 00:00      
            "woefully incomplete", eh?            01/01/70 00:00      
               response            01/01/70 00:00      
                  there are some \"gotchas\"            01/01/70 00:00      
                     I used them before they became flash parts            01/01/70 00:00      
                        So, where's the link to the ST software?            01/01/70 00:00      
                           let a WSI user find that out            01/01/70 00:00      
                              There are no more WSI users ... there's no WSI            01/01/70 00:00      
                                 WSI usres-PSD usres OK            01/01/70 00:00      
                           Richard... What P/N you looking at?            01/01/70 00:00      
                              I just skimmed over the four most prominent ones            01/01/70 00:00      
                           Is this it?            01/01/70 00:00      
                     PSD/uPSD            01/01/70 00:00      
   A couple of Articles on embedded I/O            01/01/70 00:00      
      broken libks            01/01/70 00:00      
         fixed            01/01/70 00:00      
      informative article(s) but ...            01/01/70 00:00      
         CPLDs and FPGAs            01/01/70 00:00      
            differences            01/01/70 00:00      
               that's not really the issue...            01/01/70 00:00      
            They\'re available at no cost            01/01/70 00:00      
               the invasion of ther windows "programmers"            01/01/70 00:00      
            re: CPLDs and FPGAs            01/01/70 00:00      
               Andy PLEASE            01/01/70 00:00      
            I only promote stuff            01/01/70 00:00      
         FPGA/CPLD drawbacks            01/01/70 00:00      
            please make complete statements            01/01/70 00:00      
               @Erik: please read complete:            01/01/70 00:00      
                  giving examples does not exclude            01/01/70 00:00      
            well, that's a big maybe ...            01/01/70 00:00      
               an example            01/01/70 00:00      
                  voltage is not my choice            01/01/70 00:00      
                     where is the beef?            01/01/70 00:00      
                        it depends            01/01/70 00:00      
                           costs less, too.            01/01/70 00:00      
   consider this ...            01/01/70 00:00      
      but why skin a cat that is rotted? the fur will no            01/01/70 00:00      
         You keep saying that, but WHY?            01/01/70 00:00      
            NO WAY            01/01/70 00:00      
               I'm not from Missouri, but "SHOW ME"            01/01/70 00:00      
                  you have now visited Missouri            01/01/70 00:00      
                     waitaminute Erik...            01/01/70 00:00      
                        and my argument is            01/01/70 00:00      
                           your argument is fallacious            01/01/70 00:00      
                              once more mixing I/O mapped and MMIO            01/01/70 00:00      
                              OFF TOPIC but...            01/01/70 00:00      
                                 it\'s the disparity between rural and urban areas            01/01/70 00:00      
                                    I do not, BUT            01/01/70 00:00      
                           pins, lost&found            01/01/70 00:00      
                              a rephrase, a question and a subject issue            01/01/70 00:00      
                                 technically            01/01/70 00:00      
                                    mixing once more            01/01/70 00:00      
                                 You're being either crazy or stupid, Erik            01/01/70 00:00      
                                    I think the crazy one is you, Richard            01/01/70 00:00      
                                       I'm a seasoned man ...            01/01/70 00:00      
                                          Same back at ya            01/01/70 00:00      
                                             Now we're into semantics            01/01/70 00:00      
                                                Now you are completely off the rocker. Who, more            01/01/70 00:00      
                                                   Wake up!            01/01/70 00:00      
                                                      that is a BLATANT LIE            01/01/70 00:00      
                                                         Good grief, Erik! It's not personal ...            01/01/70 00:00      
                                                            YES, YES and YES. I even had to code it in assemb            01/01/70 00:00      
                                                         you could state that explicitly....            01/01/70 00:00      
                                             I've tried to be diplomatic            01/01/70 00:00      
                                                I'll try it, too            01/01/70 00:00      
                                                   the IIC as an alternative            01/01/70 00:00      
                                                      As an alternative, but only sometimes            01/01/70 00:00      
                                                         two viewpoints            01/01/70 00:00      
                                                         SATA            01/01/70 00:00      
                                                            I\'d like to meet...            01/01/70 00:00      
                                                               My point            01/01/70 00:00      
                                                               Parallel works off-board as well            01/01/70 00:00      
                                                            very true, but it doesn\'t apply            01/01/70 00:00      
                                                         try THAT with the 8255            01/01/70 00:00      
                                                            Erik, it might surprise you to learn ...            01/01/70 00:00      
                                                               WHAT            01/01/70 00:00      
                                                                  Erik, in response to WHAT            01/01/70 00:00      
                                                               that implies serial, in which case the 8255            01/01/70 00:00      
                                                                  I said is was parallel-interfaced ...            01/01/70 00:00      
                                                                     Please find the word 'parallel', I may be going bl            01/01/70 00:00      
                                                                        You're right, I left it out ...            01/01/70 00:00      
                                                                           The title of nthe thread is "How to extend the por            01/01/70 00:00      
                                                                              Yes, it's HOW TO and not HOW NOT TO ...            01/01/70 00:00      
                                                                                 attaching an old ratteling caboose to a high speed            01/01/70 00:00      
                                                         not that slow - especially compared to the 8255            01/01/70 00:00      
                                                            Erik, look at the datasheet ...            01/01/70 00:00      
                                                               how do you propose to \"get it in\" at that speed            01/01/70 00:00      
                                                                  Yes, this needs clarification            01/01/70 00:00      
                                                                     no, you don't            01/01/70 00:00      
                                                                        Erik, Once again, you've brought too much to            01/01/70 00:00      
                                                                           nope, there are plenty of boards with (sorry, I kn            01/01/70 00:00      
                                                                              Well, show me ... it\'s proven untrue so far.            01/01/70 00:00      
                                                                                 I am really curious what you are making where a            01/01/70 00:00      
                                                                                    Been there, done that ...            01/01/70 00:00      
                                                                                       now you lose me            01/01/70 00:00      
                                                                                          I don\'t like \'em.            01/01/70 00:00      
                        Jan ... DIGIKEY's not always the cheapest            01/01/70 00:00      
                           of course, if you can sell the sh eh stuff            01/01/70 00:00      
                     the datasheet says ...            01/01/70 00:00      
                        are you mixing cement in a futile attempt to cast            01/01/70 00:00      
                           go back to school, Erik!            01/01/70 00:00      
                           go back to school, Erik!            01/01/70 00:00      
                              I say, you say            01/01/70 00:00      
                                 Erik, go back and read the whole thing            01/01/70 00:00      
                                    had Peter IlyitchTscaikowsky lived ...            01/01/70 00:00      
                                       one more... :-)            01/01/70 00:00      
                                          hve you see any post stating that?            01/01/70 00:00      
                                             yes. Richard's... :-)            01/01/70 00:00      
                                                and that was because ...            01/01/70 00:00      
   Why is this so endlessly fascinating?            01/01/70 00:00      
      to Jez            01/01/70 00:00      
         i dunno            01/01/70 00:00      
   "Extending Input/output"            01/01/70 00:00      
      "Extending Input/output"            01/01/70 00:00      

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