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Real Time Clocks Slide 4
In the diagram on this slide, the microcontroller is still the heart of the system, but is supported by a separate RTC. A stand-alone RTC can achieve higher accuracy and/or lower power consumption than an integrated RTC. Usually an integrated RTC will not have temperature compensation while some stand-alone RTCs have temperature compensation in order to achieve high accuracy. Due to the use of an optimal process for RTC construction, current consumption can be very low.
PTM Published on: 2011-11-02