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PCF2129 RTC with OM13092

Question asked by Fatih ozen on Feb 7, 2019
Latest reply on Feb 19, 2019 by Fatih ozen



I have PCF2129T and OM13092 Dev. Board ( LPC54608 ).  I wanna have updated time in my projects and testing this RTC. I chose I2C for communication and added a battery to RTC. But when I cut the power from board and then repower it, RTC datas gone away. It shows strange datas. I changed battery once and still same result. Project in attachment. It seems battery is not working. Battery voltage is 2,941 V now. Any suggestion ?


no battery:


with battery(similar result):


connection is like :