68020 vs 68EC020

From: Ryan Brooks <ryan_at_inc.net>
Date: Tue May 25 20:14:47 1999

Highspeed CMOS (just updated from the original NMOS version).

The more interesting HC part is the HC001, which has static bus sizing, and some
other hacker friendly features.

Ryan Brooks
ryan_at_inc.net


Paul Thompson wrote:

> OK, my curiousity is piqued.
>
> What is the HC in MC68HC000 chips? The one I have is on a DEC RF31
> disk drive controller.
>
> Paul
>
> On Tue, 25 May 1999, Pete Turnbull wrote:
>
> > On May 25, 21:47, Tony Duell wrote:
> > > Subject: Re: 68020 vs 68EC020
> > > >
> > > > An A1200 question: what's the difference between the 68020 and 68EC020?
> > >
> > > I believe the 'EC' version is for Embedded Control, and lacks some of the
> > > functions of the plain 68020 (probably MMU-related or something).
> >
> > I'm not sure of the other details, but "EC" = "Embedded Control", as you
> > say. According to my Motorola cribsheet, it's a 68020 with only 24-bit
> > addressing, without the dynamic bus sizing, ands restricted speed range.
> > It does have the co-pro interface, though, and probably most if not all of
> > the instruction set (the crib sheet doesn't get very detailed).
> >
> > --
> >
> > Pete Peter Turnbull
> > Dept. of Computer Science
> > University of York
> >
Received on Tue May 25 1999 - 20:14:47 BST