![](https://images2018.cnblogs.com/blog/1363834/201807/1363834-20180711102420771-1213630472.png)
PLLCLK~72M
HSE ~~~8M
HSI ~~~8M
SYSCLK~72M
usb是48MHz
![](https://images2018.cnblogs.com/blog/1363834/201807/1363834-20180712110457691-446059460.png)
![](https://images2018.cnblogs.com/blog/1363834/201807/1363834-20180712110754684-785371881.png)
![](https://images2018.cnblogs.com/blog/1363834/201807/1363834-20180712135714589-1295494598.png)
![](https://images2018.cnblogs.com/blog/1363834/201807/1363834-20180712140214034-850851156.png)
posted @
2018-07-11 15:36
踏实,勿忘初心
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