You are here

Clocks, Timer, Tolerance and Accuracy Question | Cypress Semiconductor

Clocks, Timer, Tolerance and Accuracy Question

Summary: 2 Replies, Latest post by odissey1 on 18 Jan 2016 05:15 PM PST
Verified Answers: 2
Last post
Log in to post new comments.
Tom Riddlr's picture
10 posts

I have been using a timer to use as a global clock for one of my programs and there seems to be a slight inaccuracy (about 0.08% lag) on the clock so I adjusted the period to match.

Here is a picture of my timer setup: (also attached)

For both clocks I set tolerance to unchecked. Does this make the inaccuracy worse or better? Will there always be inherent inaccuracy of the cypress timer in the kit? Is there a way that this accuracy can be improved?

user_1377889's picture
9249 posts

The accuracy of the IMO can only be improved by using a crystal. IMO is +- 1%, releasing the clock accuracy only affects the timing checks, not the accuracy itself.



user_342122993's picture
527 posts

Tom, 0.08% accuracy is remarkably good. The on-board oscillator stability over time is just slightly better than 0.1%, attaching a frequency meter shows  perpetual frequency jitter around the forth digit, which means that there is nothing to improve without XO as was mentioned by Bob Marlowe. 

Log in to post new comments.