sleep mode, the system and the real- time clock to generate the system clock clock generation method

摘要

The real-time clock and the system clock generation method for generating a power-saving mode when the system clock starts. The real-time clock (Real Time Clock: RTC) is entering sleep when the rain -bit and dispense controlled storage registers and enters sleep from the control register bit is applied, the system uses the RTC clock generation power-saving system clock divider ratio according to the clock (v) a generation . As a result , that the operating frequency of the clock by using the RTC to always operate when the power saving mode , by generating a system clock , a power save control makes effective the additional power consumption for the generation of the system clock is possible .