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jitter in SSP output data

mtraman
Associate II

‎2007-03-12 12:09 AM

Posted on March 12, 2007 at 08:09

jitter in SSP output data

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mtraman
Associate II

‎2011-05-17 12:39 AM

Posted on May 17, 2011 at 09:39

I have interfaced the codec WM8978 from Wolfson Microelectronics, to STR912FW44X6 microcontroller.

I need to send data through SSP1 to the codec every 20.833 microseconds. To do this i have initialized a timer to give an interrupt every 20.833usec.

But, the SSP data is not output, exactly every 20.833usec. It is output at 20.833 +/-0.5usec.

How to remove this jitter?

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