I have gone thru the dathasheet of OMAP4. but i did not get in info of RTC in the datasheet. to have RTC in our system do we have to use external RTC chip or OMAP4 have the internal RTC.
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The OMAP4 itself does not have an RTC. However, for OMAP4 designs, the RTC is present in the companion power IC (TWL6030/TWL6032).