If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
在数据手册上有说明。 For input clockfrequencies between 20 and 30 MHz, a crystal with 60 ohm max ESR is recommended. Typical load capacitance values are 10-20 pF, where the load capacitance is the series combination of C1 and C2.
6.5 Crystal Oscillator or External Clock Input http://www.ti.com/lit/ds/symlink/omap-l138.pdf
