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Which uController to learn?

Discussion in 'Electronic Components' started by John E., Mar 15, 2007.

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  1. Lionel

    Lionel Guest

    Hell no! I was speaking generally. ;^)
    Well, light meters for photographics work on a Log2 scale, so it
    requires more ADC resolution than you might expect at first glance.
    That said, a good sample & hold in front of a dual-slope converter
    would be perfectly suitable for most such purposes.
     
  2. krw

    krw Guest

    First, why don't you tell me what you so object to, since you were
    the person I responded to (and have said nothing more than "you're
    wrong).
     
  3. Lionel

    Lionel Guest

    If you'd actually read the whole post, you would've noticed that I've
    already posted a link to one reference. You can start there.
    Once you're done, you can check:
    <http://www.google.com/search?&q=define:RISC&oi=glossary_definition>
    Be sure to let us all know if you manage to find a reference that
    agrees with your definition of 'RISC' as meaning: "Reduce Instruction
    Set Complexity", raher than "Reduced Instruction Set Computer".
     
  4. krw

    krw Guest

    How about Carnegie Mellon University School of COmputer Science?
    (http://www.cs.cmu.edu/~mprice/Relationship Strategies.txt)

    "The most famous approach to these problems is called RISC, short
    for Reduced Instruction Set Complexity.

    Or, University of Iowa Department of Computer Science
    http://www.cs.uiowa.edu/~jones/assem/summer97/notes/16.html

    "As a result, processors designed according to the RISC (reduced
    instruction set complexity) philosophy..."'

    Berkley

    http://ptolemy.eecs.berkeley.edu/publications/papers/93/jbuckThesis/t
    hesis.pdf

    "A RISC (Reduced Instruction Set Complexity) processor, as used in
    most workstations today..."

    Sun Microsystems:
    http://www.freepatentsonline.com/5784588.html

    "Many architectures, notably reduced instruction set complexity
    (RISC) architectures such as the Scalable Processor Architecture
    (SPARC.TM.)..."

    MIT
    Supertech.csail.mit.edu/papers=3Fkuszmaul.ps

    "It has been widely argued that one cannot afford to put any
    new =3Facademic=3F mechanisms into state-of-the-art RISC
    microprocessors because of the billion-dollar investment that
    is put into such microprocessors. That billion-dollar
    investment, however, is indicative of the fact that the
    =3FReduced Instruction Set Complexity=3F designs have become very
    complex indeed."
    [/QUOTE]
     
  5. Lionel

    Lionel Guest

    [more cherry picked webpages]

    Except that all of those references are all at least 10 years more
    recent than the invention of the concept, & none of them are actual
    academic papers. (Hint: they're all 'backronyms':
    <http://en.wikipedia.org/wiki/Backronym>)

    Googling from some of the same placess:
    CMU:
    <http://www.google.com/search?q=site:www.cs.cmu.edu+"reduced+instruction+set+computer>
    Gives 57 results, dating back as far as 1980, including actual
    published papers, course material & other formal references.

    Berkely:
    <http://www.google.com/search?q=site:berkeley.edu+"reduced+instruction+set+computer>
    Gives 141 results similar types to those from CMU.

    MIT:
    <http://www.google.com/search?q=site:mit.edu+"reduced+instruction+set+computer>
    106 results, as above.

    Iowa U:
    <http://www.google.com/search?q=site:uiowa.edu+"reduced+instruction+set+computer>
    11 results. (Not exactly a CompSci pioneer, so not very surprising.)

    Sun:
    <http://www.google.com/search?q=site:sun.com+"reduced+instruction+set+computer>
    123 results.
     
  6. Lionel

    Lionel Guest

    ADCs & DACs are sold as modules for exactly this reason.
    Mate, that's electronics for you. If you need those sorts of features,
    you need to either pay someone else the big bucks to make you one, or
    study long enough to figure out how to make one yourself. (At which
    time you'll discover why the first option is so expensive.)
    I'm tempted to make a joke here about wanting a pony. ;^)
    16 bit ADCs (& even DACs) are expensive & difficult to implement at
    the best of times. Trying to put them on a microcontroller would be
    just about impossible to do at a sane price. (Plus it'd require
    multiple, ultra-low-noise, power lines & complex shielding.)
     
  7. Lionel

    Lionel Guest

    Just to make my point 100% crystal clear, the above should've said:
    "Googling for 'reduced instruction set COMPUTER' from the same sites:"
    (As is obvious from the URLs themselves.)
     
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