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SysCtlClockSet设置问题



采用系统库函数SysCtlClockSet(SYSCTL_SYSDIV_4 | SYSCTL_USE_PLL | SYSCTL_XTAL_16MHZ |  SYSCTL_OSC_MAIN);配置系统时钟,此函数调用时间大约为250ms左右,但要求系统总上电时间不超过100ms,有没有什么方法能缩短配置时间呢?