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How can I set timer to decrementing mode???

 
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stoyanoff



Joined: 20 Jul 2011
Posts: 375

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How can I set timer to decrementing mode???
PostPosted: Wed Feb 15, 2012 4:43 am     Reply with quote
Usually the timers in PIC microcontroller are in incrementing mode (they add 1 to the actual value). I need to make timer counting in opposite direction.
Could it be done and how???
Thanks!
Ttelmah



Joined: 11 Mar 2010
Posts: 19538

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PostPosted: Wed Feb 15, 2012 5:12 am     Reply with quote
No.
They are up counters.
Generally, no counter like this would be an up/down unit. Costs a lot more gates to implement than a simple up counter, and given that you can always ones complement the result in software, not worth the chip real-estate.

Best Wishes
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