It is recommended that the user select the internal RC oscillator clock as the preset system clock source, even with an external crystal clock, thus ensuring system stability. The user can switch the system clock source from the external crystal clock to the external crystal clock after the external crystal clock is activated. If there is a power saving requirement, the internal RC oscillator clock can be disabled after switching the system clock source.建议用户选择内部RC振荡器时钟作为预设的系统时钟源，即使使用外部晶体时钟，也能保证系统的稳定性。 用户可以在外部晶体时钟被激活后，将系统时钟源从外部晶体时钟切换到外部晶体时钟。 如有节电要求，切换系统时钟源后可禁用内部RC振荡器时钟。
It is recommended that the user select the internal RC oscillator clock as the preset system clock source, even with an external crystal clock, thus ensuring system stability. The user can switch the system clock source from the external crystal clock to the external crystal clock after the external crystal clock is activated. If there is a power saving requirement, the internal RC oscillator clock can be disabled after switching the system clock source.建议用户选择内部RC振荡器时钟作为预设的系统时钟源，即使使用外部晶体时钟，也能保证系统的稳定性。 用户可以在外部晶体时钟被激活后，将系统时钟源从外部晶体时钟切换到外部晶体时钟。 如有节电要求，切换系统时钟源后可禁用内部RC振荡器时钟。
建议用户选择内部RC振荡器时钟作为预设的系统时钟源，即使使用外部晶体时钟，也能保证系统的稳定性。 用户可以在外部晶体时钟被激活后，将系统时钟源从外部晶体时钟切换到外部晶体时钟。 如有节电要求，切换系统时钟源后可禁用内部RC振荡器时钟。 
举报
