68020 vs 68EC020

From: Paul Thompson <thompson_at_athenet.net>
Date: Tue May 25 19:42:26 1999

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 - 19:42:26 BST