LMK00301: How do we deal with lmk00301 devices' X1 and X2 (pin16 and pin 17) without use? connecting to Grounding or not? (I didn't find such a description in the manual), if not grounding, what would be the impact？ thank you very much ！对lmk00301器件

How do we deal with lmk00301 devices' X1 and X2 (pin16 and pin 17) without use? connecting to Grounding or not? (I didn't find such a description in the manual), if not grounding, what would be the impact？ thank you very much ！对lmk00301器件的X1和X2（16、17）管教不用的情况下怎么处理？接地or不接?（我在手册中没有发现此类描述），如果不接地的话，会有什么影响，非常感谢