HC11 Transistor Architecture

Hai

Is there anybody give me guidance about RTL implementation of the complete
68HC11. I am involved in design of one such at transistor level and none of
the book or online reference talk about pure hardware implementation. All I
could see is how to program a HC11 but not how to build one. Any
information in this regard would help.
Thanks, Vijay

On 2005-11-02, harivj <harivj@rediffmail.com> wrote:

> Is there anybody give me guidance about RTL implementation of
> the complete 68HC11.

You want to build an HC11 using resistor-transistor logic?

I suppose it's possible -- you could build one from relays if
you had enough of them, but why on earth would one attempt such
a thing?

-- 
Grant Edwards                   grante             Yow!  I'm protected by
                                  at               a ROLL-ON I rented from
                               visi.com            AVIS...

Grant Edwards wrote:

> On 2005-11-02, harivj <harivj@rediffmail.com> wrote:
> 
>> Is there anybody give me guidance about RTL implementation of
>> the complete 68HC11.
> 
> You want to build an HC11 using resistor-transistor logic?
> 

I believe Vijay is referring to Register Transfer Level representation of 
the HC11. It's essentially a programmatic method of simulation.

-- Noel Henson
www.noels-lab.com       Chips, firmware and embedded solutions
www.vimoutliner.org     Work fast. Think well.

On 2005-11-02, Noel Henson <noel@noels-lab.com> wrote:

>>> Is there anybody give me guidance about RTL implementation of
>>> the complete 68HC11.
>> 
>> You want to build an HC11 using resistor-transistor logic?
>
> I believe Vijay is referring to Register Transfer Level
> representation of the HC11. It's essentially a programmatic
> method of simulation.


Ah. I thought it must be something other than
resistor-transistor logic, but all Google came up with was the
German TV netowrk.  I probably should have thrown in a few more
keywords.

Is RTL synthesizable, or is it just for simulation?

-- 
Grant Edwards                   grante             Yow!  I'm sitting on my
                                  at               SPEED QUEEN... To me,
                               visi.com            it's ENJOYABLE... I'm
                                                   WARM... I'm VIBRATORY...

Grant Edwards wrote:
> Is RTL synthesizable, or is it just for simulation?

RTL isn't a specific language, it's a level of abstraction.  I'm not
sure of a formal definition, but in general it involves defining
registers and the data paths and conbinatorial logic that links them.

RTL code would most commonly be written in Verilog or VHDL, though other
suitable languages exist.  Normally an RTL design should be
sythesizable; the non-synthesizable constructs in the HDLs generally
aren't appropriate for an RTL design.  An obvious example would be a
VHDL statement such as "wait 5 ns"; such a statement isn't consistent
with RTL.

Eric

On 2005-11-02, Eric Smith <eric@brouhaha.com> wrote:

>> Is RTL synthesizable, or is it just for simulation?
>
> RTL isn't a specific language, it's a level of abstraction.

Thanks.  Got it. I thought it was a specific language, but
couldn't find anything concrete about it.

-- 
Grant Edwards                   grante             Yow!  .. over in west
                                  at               Philadelphia a puppy is
                               visi.com            vomiting...

Grant:

Only the old duffers in the group would remember RTL.  (I be one).   Fairchild
was the supplier I remember best.  The venerable 723/923 flip flop and the 900
buffers.  The packages were great little blobs of epoxy similar to the
transistors of the day.  We, of course, felt empowered by such technology.

Blakely

Grant Edwards wrote:

> On 2005-11-02, Noel Henson <noel@noels-lab.com> wrote:
>
> >>> Is there anybody give me guidance about RTL implementation of
> >>> the complete 68HC11.
> >>
> >> You want to build an HC11 using resistor-transistor logic?
> >
> > I believe Vijay is referring to Register Transfer Level
> > representation of the HC11. It's essentially a programmatic
> > method of simulation.
>
> Ah. I thought it must be something other than
> resistor-transistor logic, but all Google came up with was the
> German TV netowrk.  I probably should have thrown in a few more
> keywords.
>
> Is RTL synthesizable, or is it just for simulation?
>
> --
> Grant Edwards                   grante             Yow!  I'm sitting on my
>                                   at               SPEED QUEEN... To me,
>                                visi.com            it's ENJOYABLE... I'm
>                                                    WARM... I'm VIBRATORY...

On 2005-11-02, Noone <Noone@wrenchman.com> wrote:

> Only the old duffers in the group would remember RTL.  (I be
> one).  Fairchild was the supplier I remember best.  The
> venerable 723/923 flip flop and the 900 buffers.  The packages
> were great little blobs of epoxy similar to the transistors of
> the day.  We, of course, felt empowered by such technology.

I must admit that I never actually used RTL (but it was still
covered briefly when I was in school).  One of the first places
I worked still had a few drawers of RTL parts for maintenance
purposes.

-- 
Grant Edwards                   grante             Yow!  Now KEN and BARBIE
                                  at               are PERMANENTLY ADDICTED to
                               visi.com            MIND-ALTERING DRUGS...

Noone wrote:
> Grant:
> 
> Only the old duffers in the group would remember RTL.  (I be one).   Fairchild
> was the supplier I remember best.  The venerable 723/923 flip flop and the 900
> buffers.  The packages were great little blobs of epoxy similar to the
> transistors of the day.  We, of course, felt empowered by such technology.


My first IC's - MC 700 series, NOR logic with severely limited
fan-in and fan-out. Year 1968 or 1969.

-- 

Tauno Voipio
tauno voipio (at) iki fi

Noone <Noone@wrenchman.com> writes:
> Grant Edwards wrote:
> > On 2005-11-02, Noel Henson <noel@noels-lab.com> wrote:
> >
> > >>> Is there anybody give me guidance about RTL implementation of
> > >>> the complete 68HC11.
> > >>
> > >> You want to build an HC11 using resistor-transistor logic?
> > >
> > > I believe Vijay is referring to Register Transfer Level
> > > representation of the HC11. It's essentially a programmatic
> > > method of simulation.
> >
> > Ah. I thought it must be something other than
> > resistor-transistor logic, but all Google came up with was the
> > German TV netowrk.  I probably should have thrown in a few more
> > keywords.
> >
> > Is RTL synthesizable, or is it just for simulation?
> 
> Only the old duffers in the group would remember RTL.
> (I be one).   Fairchild was the supplier I remember best.

Wasn't Fairchild the only supplier?

> The venerable 723/923 flip flop and the 900 buffers.  The
> packages were great little blobs of epoxy similar to the
> transistors of the day.

They were also great little hand warmers on cold days.

> We, of course, felt empowered by such technology.

It beat discrete components!