micocontroller...................help needed!

Discussion in 'Homework Help' started by mdew_47, Mar 1, 2008.

  1. mdew_47

    Thread Starter Member

    Mar 1, 2008
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    could anyone make me understand the advent of single chip microcomputer(microcontroller) from large scale computer?(20 marks)
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Look up the topic "integrated circuit" and "Intel 4004".
     
  3. mdew_47

    Thread Starter Member

    Mar 1, 2008
    22
    0
    thanks but i will be glad if you are more specific!
     
  4. Papabravo

    Expert

    Feb 24, 2006
    10,135
    1,786
    In my opinion, large computers of the time including the IBM 7094 and system 360, had nothing whatever to do with the development of the single chip microcontroller.

    Desktop and handheld calculators were clearly the greater influence. Lesser known to consumers was the advent of the data entry terminal which replaced the Model 26 and Model 29 keypunch.

    Who is feeding you these fairy tales anyway? Some young professor who was born after the fact I suppose.
     
  5. mdew_47

    Thread Starter Member

    Mar 1, 2008
    22
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    what i have got in one book is:

    Microcontroller: A highly integrated chip that contains all the components
    comprising a controller.
    • Typically this includes a CPU, RAM, some form of ROM, I/O ports, and timers.
    • Unlike a general-purpose computer, which also includes all of these components,
    a microcontroller is designed for a very specific task - to control a particular
    system.
    • A microcontroller differs from a microprocessor, which is a general-purpose chip
    that is used to create a multi-function computer or device and requires multiple
    chips to handle various tasks.
    • A microcontroller is meant to be more self-contained and independent, and
    functions as a tiny, dedicated computer.
    • The great advantage of microcontrollers, as opposed to using larger
    microprocessors, is that the parts-count and design costs of the item being
    controlled can be kept to a minimum.
    • They are typically designed using CMOS (complementary metal oxide
    semiconductor) technology, an efficient fabrication technique that uses less power
    and is more immune to power spikes than other techniques.
    • Microcontrollers are sometimes called embedded microcontrollers, which just
    means that they are part of an embedded system that is, one part of a larger device
    or system.


    will it do?

    and yes the prof. is young, but still the question comes in our university exam paper!
     
  6. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    It may be that you are dealing with a different emphasis on the history of electronics. My understanding is that the military provided the funds and impetus for the development of the integrated circuit. The issue was reliability. Vacuum tubes are prone to failure and don't respond well to mechanical shock.

    There are parallel and not well integrated histories of military and civilian interest and development of computers. So far, each essentially ignores the other. While I was in the service, I saw discreet transistors in just about all computer equipment. RTL and DTL were it. TTL was so exotic in 1970 that we would buy floor sweepings in hopes to get a quad AND gate with three sections still working. Mike Quinn's in Oakland sold transistors by the pound, and core memory by the square inch.

    Smaller and faster was always the goal. I had a friend who was having to hand select TTL chips in the early 1970's for the Minuteman missile computer. They had to run at 40 MHz, double the spec. At that, all the "computer" could do was track a guide star for navigation. Even though the Intel 4004 wasn't much more than a calculator, it was an enormous advance over all discreet TTL computers.

    That is one path followed.
     
  7. mdew_47

    Thread Starter Member

    Mar 1, 2008
    22
    0
    thank you both for your respond!
     
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