Clocks and startup
System clock selection is performed on startup, however the internal RC 8 MHz oscillator is
selected as default CPU clock on reset. An external 4-16 MHz clock can be selected, in
which case it is monitored for failure. If failure is detected, the system automatically switches
back to the internal RC oscillator. A software interrupt is generated if enabled. Similarly, full
interrupt management of the PLL clock entry is available when necessary (for example with
failure of an indirectly used external oscillator)
时钟和启动
系统时钟选择在启动时执行,但内部RC 8 MHz振荡器是
复位时选择默认CPU时钟。可以选择外部4-16 MHz时钟
在哪种情况下,它会被监控失败。如果检测到故障,系统将自动切换
回到内部RC振荡器。如果启用,则会生成软件中断。同样,完整
必要时可以使用PLL时钟输入的中断管理(例如,使用
间接使用的外部振荡器故障)。