不同的负载电容对晶振的影响

10ppm 10/1000000
24MHz 10ppm = 24MHz /- 240Hz

37.4MHz 12pF 37.39802MHz
37.4MHz 22pF 37.39712MHz
37.4MHz 6pF 37.39949MHz 37.39955MHz

24.0MHz 12pF 23.99962MHz 23.99974MHz
24.0MHz 6pF 24.00032MHz
24.0MHz 10pF 23.99987MHz

调整 37.4MHz 晶振后 AP6335 WiFi 传输速率从 11.5MB/s 提升到了 14.4MB/s