Re: Do you see any future to the 8-bit MCU's?
- From: Tim Wescott <tim@xxxxxxxxxxxxxxxx>
- Date: Thu, 21 Jul 2011 13:14:12 -0500
On Thu, 21 Jul 2011 11:06:23 -0700, linnix wrote:
On Jul 21, 9:46 am, Tauno Voipio <tauno.voi...@xxxxxxxxxxxxxxxxxx>
On 21.7.11 6:30 , Antoni Lacasta i Sullà wrote:
During the latest months I have been receiving offers for 32-bit
MCU's, mostly based on ARM-Cortex CPU's, at prices I'm currently
paying for 8-bit devices, or even cheaper! This has brought me to
benchmark them with the MCU independent part of my C++ code and
surprisingly the results are quite similar.
Same price, same flash consumption ... what do yo think? Is this the
end of the 8-bit's? I guess it is.
I just redesigned an old card using a 8051, an A/D converter, a static
RAM (2 kilobytes) and some glue logic. The new card was done with a
Stellaris Cortex, LM3S818. All the IC:s on the new card costed together
less than the A/D converter chip on the old design.
When our current AVR -based designs need to be replaced, the Stellaris
chips are the potential replacements.
The Stellaris chips run fast with minimal electricity, but there is the
price of a quite complicated set-up of the master and peripheral clocks
and port pins.
Except for the price of the tools. AVR and PIC tools are still much
cheaper. We expect to spend around $1k for the new tools;
unfortunately, the cheap/low cost version won't cut it.
I'm using the gnu-arm tool chain, built from source*. It works fine.
How much does CodeSourcery want for the 'real' tools?
* I'm not saying it was _free_, but I built the tool chain when I was
between contracts, so it was relatively cheap.