Generating accurate High Frequency Clock for PSoC 3 | Cypress Semiconductor
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Generating accurate High Frequency Clock for PSoC 3
How can I generate most accurate clock at high frequencies in PSoC 3?
To get the most accurate clock at higher frequencies, one should use IMO at 3MHz as it is most accurate at this frequency (1% error). Then PLL should be used to increase the frequency to a desired higher value to get maximum accuracy of clock at higher frequencies.
The use of IMO at higher frequencies reduces the accuracy of IMO (7% error at 62.6 MHz). Therefore, lower frequency IMO and PLL combination is best suited for accurate high frequency generation.