|
Message
From: sunnycool20@h...
Date: Mon, 15 Sep 2003 16:50:02 +0200
Subject: Re: [openrisc] Microprocessor or Microcontroller
please if you can help me in my assignment.i wanna know what are the
differences between a micro controller and a micro processor. i will be
very thank ful. i have to submit my assignment on wednesday.
thanks alot in advance
bye
----- Original Message -----
From: "Jim Dempsey" <dempsey@n... >
To: <openrisc@o... >
Date: Fri, 9 Nov 2001 11:52:58 -0600
Subject: Re: [openrisc] Microprocessor or Microcontroller
>
>
> I've written a few operating systems for the PDP-8 minicomputer.
> One can think of that as one of the grandfathers of RISC
> processors.
> These operating systems were multi-user with real-time
> functionality
> having user/kernel modes, networking, multiprocessors and such.
> Although the PDP-8 series of computers were an assemblage of
> IC's (usually 7400 series) Intercill and Harris produced this
> processor
> as a single chip microprocessor.
>
> If you lined up all the microprocessors, microcontrollers,
> microsequencers
> state machines from end to end there would be no fine lines
> dividing them.
>
> If I were to state which is what I would tend to say something like
>
> A (micro)state machine is a component of a microsequencer
> A microsequencer is a component of a microprocessor
> A microprocessor is a component of a microcontroller
>
> Where "micro" implies an embodiement partly or in whole as an
> integrated
> circuit (e.g. silicon). You can have state machines, sequencers,
> processors
> and controllers using mechanical parts e.g. contacts in washing
> machine
> timing motor or paper music rolls and vacuum lines for a player
> piano.
>
> Because members of this forum are generally programming PLD's all
> of
> these terms are abstractions. A librarian might want to classify
> them for
> ease of reference. For this I would classify the Microcontroller as
>
> That which is applied to a particular purpose.
> e.g. the logic inside a Microwave Oven.
>
> The Microprocessor being but one of components of the
> Microcontroller.
>
> Off the subject
>
> I haven't done a hardware project yet and am looking at the
> Altera Excalibur (Nios) Development system. I am on a shoe-string
> budget. Has anyone have anything good or bad to say about this
> system?
>
> Also, what else might I need to setup a low budget development shop
> to breadboard a project. I've looked at many prototyping systems
> and boards. The Altera Excalibur (Nios) Development System has
> the configuration needed for development excepting for some
> connectors.
> I was thinking about using the PMC connectors to go to a Mezzanine
> breadboard daughter card. The daughter card would not be a PCI
> type device. The PMC connectors has oodles of I/O pin connections
> and seem better to use than the other square peg headers on the
> board.
> Does anyone make a PMC breadboard daughter card for the connector
> layout as found on this proto-typing card?
>
> Thanks in advance
>
> Jim Dempsey
>
>
>
> ----- Original Message -----
> From: "Sam Gladstone" <samg@t... >
> To: <openrisc@o... >
> Sent: Thursday, November 08, 2001 8:07 PM
> Subject: [openrisc] Microprocessor or Microcontroller
>
>
> > Does anyone here have a idea on the classification of
> microprocessor vs.
> > microcontroller?
> > I wonder if at some point it might be prudent to separate the
> projects
> into
> > microcontrollers and
> > microprocessors? I consider microprocessors to be very
> general purpose
> with
> > advanced memory address handling, user/kernel mode and other
> high level
> > features useful for running
> > advanced operating systems. Microcontrollers, for the most
> part do not
> need
> > these features.
> > A microwave SOC does not need thread control or a user/kernel
> mode. I
> think
> > that this is
> > an important distinction because it guides the design goals
> and feature
> list
> > for a processor.
> >
> > I welcome comments and people's experience.
> >
> > Regards,
> > Sam Gladstone
> >
> >
> >
> >
>
|
 |
Browse
