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2812时钟与串口波特率

外部晶振30M,内部5倍频,总共150M

串口波特率用921600,但总误码,不太准,不是标准的921600.  把外部晶振换成29.4912M就可以了。

另:如果倍频后>150M, 会出现什么情况?