Manual increment of SEC register of DS-1307 RTC

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i have assignment submit on 27th december. problem ,

i have manually increment sec register of ds-1307 rtc ic. assume present condition 19(bcd). want increment 1 20. , write sec register. how it? 

please me :)

it isn't possible manipulate register manually; you'll have write code it,  or use debugger.


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