How do select the right controller?

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After the requirements for a new application are known and a prototype
shows the minimum requirements,
1) how to select the right=smallest=cheapest controller?
2) Are there any vendor independent tables available?

Many thanks!
Werner

Re: How do select the right controller?
You should first consider which factors will make your product successful.
Smallest/fastest/cheapest may not even be relevant, depending on your design,
marketing and production requirements.

Consider the big picture first...

-Andrew M


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Re: How do select the right controller?
Hi Andrew,
you're right, a mutual effort of all resources within a company is
needed to develop, produce and sell the right product.
To create an business case you have to know your options and even its
just a relatively small component of it, it would be nice to know which
controllers would fit your requirements.
Changes to a new platform/architecture is always costly and risky, but
in some cases also a good opportunity to get an better product at the end.
I was just hoping, that for small companies that expect to produce
relatively small series of products there are some vendor independent
lists available. (Bigger companies will know where to look, I suppose).

Many thanks!
Werner

Andrew M schrieb:
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Re: How do select the right controller?

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If your expected sales volume is small then the processor price is
almost an irrelavence.  The trick here is to use a processor that saves
you the most software effort, has all the hardware periferals you need
and runs at least twice as fast as you think you will need. Start by
identifying all the "problem" areas that the processor will have to do,
ie. does it have to do anything really fast, does it need a large
memory, does it need to run at very low power levels, and so forth.


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