The manual states that at 4Mhz the resolution is 10us. At 20Mhz it is at 2us. How fast do I need the clock to have a resolution of 1us?
Thanks.
PULSIN Resolution
The manual states that at 4Mhz the resolution is 10us. At 20Mhz it is at 2us. How fast do I need the clock to have a resolution of 1us?
Thanks.
|
40Mhz .
|
Silly question but how is that calculated?
|
Actually that is NOT a silly question. I'm kinda carious myself.Originally Posted by CocaColaKid
|
My first thought would be in the time it takes to do the routine...
For example...The routine takes a certain amount of "Time" in us to execute. Thus your Pulsin resolution will take a certain amount of time to run through its routine before it can receive accurately the next pulse. If the routine takes 1000 us to read a pulse, then the maximum frequency it can read would be 1 pulse every 1 MS. which is 1000 hz. If you double the clock speed, your Pulse statement can read twice as fast, thus be able to read a pulse every 500 us... giving a 2000 hz speed max.
Dwayne
Last edited by Dwayne; - 17th November 2005 at 19:54.
Ability to Fly:
Hurling yourself towards the ground, and missing.
Engineers that Contribute to flying:
Both optimists and pessimists contribute to the society. The optimist invents the aeroplane, the pessimist the parachute
Pilots that are Flying:
Those who know their limitations, and respect the green side of the grass...
|
cotang, What statement in the book are you speaking of? If it is something like Pulsin, Rctime the resolution is based on the oscillator frequency and not the instructions being executed.
Dave Purola,
N8NTA
Members who have read this thread : 0You do not have permission to view the list of names.
Posting Permissions
Bookmarks