On Tue, 19 Feb 2019 01:00:21 +0000 (UTC) Greg Bentzinger via Emc-users <emc-users@lists.sourceforge.net> wrote:
> ( Greg ) > Every kid would love to ask for a pony, if they thought they could get it > they would ask for a unicorn. Reality however usually proves this to be > impractical to impossible. > Everything is changing today at a hyper accelerated pace. Back in the day > Motorola produced the 68000 CPU, it was used in all sorts of equipment from > Apple PC's to Okuma machine controls. I would guess that that CPU was still > being used to manufacture products 20 years after debut. Micro controllers with Cortex-M* CPU is very common today and I guess it might be for a very long time. > Today PC cpu and chip sets are what a 3-5 year life cycle before going OOP. > Same with many ARM CPU. Look at the Arduino and how many generations have > come down the road. Most new version have moved to 3.3V and are no longer > compatible with 5V shields. This have been the case with Cortex-M* almost all the time, 2.7-3.6 volt is common though NXP make one 5 volt variant. I use one with external core voltage which is lower than supply voltage and guess a lower voltage is used internally. To use 5 volt for external IO and a lower voltage internally I would guess is a very idea since inside circuit the paths are very short compared to outside but I lack knowledge/experience with construction of integrated circuits. I do not totally agree about life cycle, I have two computers in front of me which I used for quite many years despite buying the used and this never happended then I was younger. Clock frequency for laptops and ordinary stationary computers have not changed much at all the last ten years. As far as I understand Linux real time is going forward and this might make running real time on other much simpler hardware less interesting even though an ordinary computer use both quite a lot of space and power compared because they are cheap and readily available. Nicklas Karlsson _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
