Subject:
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Re: micrcontroller speeds
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Sun, 28 Jun 1998 15:34:56 GMT
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Original-From:
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Thomas Hauri <har@twi^Spamless^.ch>
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Viewed:
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1145 times
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Hi
Replacing the 16MHz version with the 20 Mhz CPU would affect only the
timer speed of the internal timers.
We are using the MC and MD versoon of the 196.
Connected to those timers are about the following :
-PWM 1 & 2
-Wavegenerator (if it has one)
- timer unit (capture and compare unit)
- counters
- serial interface (UARTS)
Maybe there is more, but at this time a can't think of any.
What your main problem will be if using motion control is that your pwm
will run at a 25% higher speed and the time critical stuff relaying on
the timer structure. Further any real tme interrupts will run 25%
faster. Speed measurement using the timers will go wrong by 25%.
You may have to change all the above to be sure your system doesn't do
strange things.
Hope this helps a little.
BYE Tom
brian-c@technologist.com schrieb:
> This question has nothing to do with the Handy Board
> although it is a general question which I need some
> help with.
>
> Previous students at the school I attend left behind
> a robot which they worked on. The microcontroller was
> Intel's 80C196. The microcontroller is shot however,
> so we need to get a replacement. It is offered in both
> 16 and 20 MHz versions. The original used in the robot
> was the 16 MHz version, however we can only find the
> 20 MHz version now.
>
> If I was to replace the 16 MHz controller with a
> 20 MHz version would it affect any of the programming?
> What would some effects be if any?
>
> Maybe direct help some of you big microcontroller
> gurus would be best. (Fred, Randy,... hint,hint) :)
>
> Thanks in advance,
> _________________________________________________
> ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
> Brian Carvalho [ brian-c@ieee.org ]
> DeVRY Institute
> New Jersey
> _________________________________________________
> ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
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Message is in Reply To:
 | | micrcontroller speeds
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| This question has nothing to do with the Handy Board although it is a general question which I need some help with. Previous students at the school I attend left behind a robot which they worked on. The microcontroller was Intel's 80C196. The (...) (26 years ago, 27-Jun-98, to lugnet.robotics.handyboard)
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