26 Mar
2010
26 Mar
'10
12:49 a.m.
On Tue, 23 Mar 2010 19:27:18 +0000 (GMT)
ard at p850ug1.demon.co.uk (Tony Duell) wrote:
Yes, that is exactely
the problem. With a single chip solution I can
start to address the real problem right away. I don't need to care
about peripheral problems like wiring up a CPU, RAM, ROM, IO, ... first.
If you design a large quantity product, a single chip solution will
reduce cost by a gread amount.
It needs to be debugged. At
least when it is build by me. Belive me. ;-)
A highly optimized
combustion process not only saves fuel but also
reduces toxic emissions. It can reduce wear on the engine. An anti-lock
brake system and air-bags enhance safety, they can even save your live.
--
tsch??,
Jochen
Homepage: http://www.unixag-kl.fh-kl.de/~jkunz/
For an awful lot of applications you don't need
more power than an old 8
bit processor IMHO. Think of the large number of small PICs, 8051s, etc
thatare are in use.
Sure. That's the reason why 8 bit controllers are still in
large
quantity production and new models come to the market.
The point is: 30 years back there was no 32 bit 50 MHz controller
available, that cost only as much as a high end 8 bitter. So you where
limited when you actually needed that compute power.
get away with
a small 8 bit controller you want a high integrated
single chip solution. At least I do. A single Atmel AVR with ISP
programmer is so much more comfortable to use, cheaper and faster to
deploy then a whole board filled with CPU, RAM, ROM, IO, ... A single
chip solution will work out of the box. A discrete CPU, RAM, ROM,
No it doesn;t,
you have to write the firmware :-). Amd that is the problem. IO, ...
solution needs lots of debuging in itself before I can start to
address the real problem.
Eh? A simple microcprocessor + ROM + RAM + a couple of
I/O chips will
work first time. It doesn't need to be debugged. Seriously, there are places where they are the right
thing to use. And
there are places where they are not. However, all to often so-called
designmrs want to solcve every problem with a mircocontroller...
Designers talk the
language they are familar with. Today most disigners
are more familar with C then with BC548. ;-)
sophisticated
mechatronical system. Not to talk about anti-lock brake
system... This is somthing I definitely want as it saves my money and
enhances safety. But you can't do this with a 8085.
The total cost of a car is
not primarily the cost of the fuel IMHO.
Considerign the fuel economy from electronic engine management doesn't
seem to be that great (based on the cars I've worked on -- I don't
drive), and considerign they are much more expensive for me to repair, I
am not at all convinced it will save me money in the end.