14 Jan
2014
14 Jan
'14
3:43 a.m.
On Jan 13, 2014, at 9:40 PM, Ethan Dicks wrote:
The SEC is essentially the EC with a core that can be run
static (i.e. you can stop the clock with no ill effect).
It's a drop-in replacement with improved power consumption,
so there's not a lot of reason to keep the other ones in
production at this point.
- Dave
On Mon, Jan 13, 2014 at 6:20 PM, Eric Smith
<spacewar at gmail.com> wrote:
It was also fairly popular in 68000-based arcade machines, at
least later ones.
On Jan 13, 2014 3:11 PM, "Ryan Brooks"
<ryan at hack.net> wrote:
Of all of those, I only know a little about the 68EC000 but never
worked with it. ISTR hearing it was popular in washing machine
controllers, but that could be a fuzzy memory. I believe the 68HC000 can dynamic size down to
8-bits...
Unfortunately the bus sizing feature is static, not dynamic, and is only on
available on the 68HC001, 68EC000, and 68SEC000, but not the far more
common 68HC000. The 68EC000 and 68SEC000 don't provide the /BGACK signal. On the other
hand, the 68SEC000 is apparently still in production, and the
other variants are not.
I haven't kept up with what's in production and what is not. There
are so many MC68K-family CPUs out there that any project I'd tackle
wouldn't make a dent in the supply.