In SX Microcontrollers, SX/B Compiler and SX-Key Tool, CounterRotatingProps wrote:

Hi Peter, Hi Ken,

Thanks much for bringing me up to speed, so to speak :)  

pjv> I can have a go in a few days to see what the current performance is.

Great! And - if it's not too much to ask - it would be helpful to learn how you clock them, as I'd probably get the components and layout wrong the first go round! 
How do you actually test the performance; do you have a canned routine?

KG> What you can count on with the SX line is consistency in production, longevity in supply, and good support from Parallax with nice tools, compilers and tutorials

Yes!  In the last months, I have reviewed many flavors of MC's --- there are indeed well founded reasons why I keep coming back here, echoing what others have said in recent threads.

This is probably pushing the good support threshold: is there any possibility that the QA routines you all use to exercise the chips could be published? As the SX's are very reliable, releasing these test routines shouldn't have adverse consequences for Parallax, I think. Even if a few chips failed, they are so inexpensive, that the failure would be financially moot for the user. Yet the feedback you'd have could be valuable, if a batch turned out to have issues. Also, releasing the QA test bed code would have a some educational benefit for users.  We'd get to see code for basically ALL of the significant functions of the chip - assuming it's tested that way. Or, if it's only time/temp/voltage sensitive sections of the chip that really need to be checked, we'd see what area's to watch out for when we push the speed up. Then there's the human error factor:  If my code fails, and I'm convinced that the routines are flawless :-P - then it must be the 'darned' chip failing.  Roll in the QA test code for a quick, and likely humbling, reality check. 

* Thanks * again - especially for your time and attention, 

cheers,

Howard in Florida ~~
~~~ ... with my CPU up on blocks in case the water comes in ... ~~~

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