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Is microprocessor an integrated circuit???

Discussion in 'Electronic Design' started by yogesh, Jan 26, 2005.

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  1. yogesh

    yogesh Guest

    Is microprocessor an integrated circuit???

  2. Jim Thompson

    Jim Thompson Guest

    Maybe, Why do you want to know ?:)

    ...Jim Thompson
  3. Fred Bloggs

    Fred Bloggs Guest

    Get lost!- and don't post to this newsgroup again.
  4. Jim Thompson

    Jim Thompson Guest

    Fred is the one that should get lost.

    ...Jim Thompson
  5. Mark Jones

    Mark Jones Guest

    Yogesh might be a 5-year-old boy... we don't know. That's the thing
    about google-groups - anyone can post there - they don't have to be
    old-school, professional usenet denziens like us. Play nice, Fred! :)

    Yogesh should go to and learn some
    basics there. That ought to keep him busy for awhile.
  6. Bradley1234

    Bradley1234 Guest

    Answer: it can be. Some microprocessors are made with discrete components,
    but most today are integrated circuits, meaning the components have been
    built onto one circuit

    Microprocessor means: micro programmed processor such that instructions are
    processed by referencing internal memory locations and there is a processor
    within a processor.

    Most commercial microprocessors are general purpose, meaning the instruction
    set gives developers methods to move/control data, but some uPs are specific
    and have a limited/specific instruction set
  8. TCS

    TCS Guest

    No it doesn't. It means micro-sized processor. What you're describing also
    includes the vax-11/780 whose processor board was hardly a microprocessor.

    A microprocessor is nearly always a single chip processor; first one was the
    4004; following were the 8080, 6800, 1802, etc. I don't bit slice processors
    could be considered a microprocessor.
  9. TCS

    TCS Guest

    and by the way, most 8 bit microprocessors weren't microprogrammed. Their
    instructions units were hard wired.
  10. Bradley1234

    Bradley1234 Guest

    Yes, the 11/780 cpu was a microprocessor. Who on earth came up with micro
    sized processor? Why not micro stereotypical processor?

    no, the first commercially sold IC microprocessor was the 4004, but there
    was one built for a dumb terminal that predates it. Bit slice are
    microprocessors, why wouldnt they be?
  11. Bradley1234

    Bradley1234 Guest

    You will want to revise the last sentence.

    The instruction units were hard wired with... microprogramming. The
    instruction is fetched and what happens? it references a memory inside the
    cpu, a processor within a processor running micro code
  12. Jamie

    Jamie Guest

    oh have a heart! :/
  13. Nope. No microprogramming. The logic was hard wired. No control-
    store, no microprogramming. Not all processors are microcoded.
  14. What color is the sky on your planet?
    Simple answer; Because they're not single-chip.

    Microprocessor == single chip processor.
  15. TCS

    TCS Guest

    No they weren't. They were hardwired via logic.
  16. TCS

    TCS Guest

    BULLSHIT. The 11/780 was a minicomputer.
  17. Bradley1234

    Bradley1234 Guest

    This is simply not accurate. Microprocessors typically operate with
    instruction and data fetch modes. When an instruction fetch takes place,
    the op code causes a branch to an internal memory of the internal cpu state
    machine, running on an internal clock. This sets off a process where the
    data portion of the instruction or subsequent fetches or registers are used
    to manipulate data, or they set some status within the cpu state machine

    There is no simple hardwired logic, there is a stored program, a
    "microprogram" within the cpu that will "crack" the instruction like a
    walnut and see whats inside and eat it if its fresh.

    Microinstructions can be 100 bits wide, or for an 8-bit? I dont recall maybe
    something like 43 bits wide, it depends.

    When there is a micro engine, using micro instructions, stored in microcode
    memory, its a micro processor. There is a clock, internal microcode address
    generator, next address logic, mux. Can you name any 8 bit cpu that uses
    only hard wired logic??
  18. Bradley1234

    Bradley1234 Guest

  19. TCS

    TCS Guest

    Which is irrelevent to wether or not a processor is microcoded.

    again, irrelevent.

    Or it can be done with combinational logic.

    or not at all.

    Some microprocessors have a microcoded instruction decoder. So do some
  20. TCS

    TCS Guest

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