topic Re: PCF2129 RTC with OM13092 in LPC Microcontrollers https://community.nxp.com/t5/LPC-Microcontrollers/PCF2129-RTC-with-OM13092/m-p/888668#M35609 <HTML><HEAD></HEAD><BODY><P>Thank you, this solved my problem.</P></BODY></HTML> Wed, 20 Feb 2019 06:25:44 GMT fatihozen 2019-02-20T06:25:44Z PCF2129 RTC with OM13092 https://community.nxp.com/t5/LPC-Microcontrollers/PCF2129-RTC-with-OM13092/m-p/888666#M35607 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P></P><P>I&nbsp;have PCF2129T and OM13092 Dev. Board ( LPC54608 ).&nbsp; 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 ?</P><P></P><P>no battery:<BR /><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_2.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/71503iBB8532CB5C444963/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_2.png" alt="pastedImage_2.png" /></span></P><P></P><P>with battery(similar result):<BR /><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_3.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/71418iD7F6BB2511E0F2D1/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_3.png" alt="pastedImage_3.png" /></span></P><P></P><P><BR />connection is like :<BR /><BR /></P><P><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_4.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/71378i872B0D4AAE2ED0A1/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_4.png" alt="pastedImage_4.png" /></span></P></BODY></HTML> Thu, 07 Feb 2019 12:04:36 GMT https://community.nxp.com/t5/LPC-Microcontrollers/PCF2129-RTC-with-OM13092/m-p/888666#M35607 fatihozen 2019-02-07T12:04:36Z Re: PCF2129 RTC with OM13092 https://community.nxp.com/t5/LPC-Microcontrollers/PCF2129-RTC-with-OM13092/m-p/888667#M35608 <HTML><HEAD></HEAD><BODY><P>Hi, Fatih,</P><P>I suppose that the second/minute/hour/month/year registers lose their value after you power off both the power supply from VDD pin and battery power supply&nbsp; from Vbat pin, you have to write the initial value to the second/minute/hour/month/year registers after you power on again.</P><P>This is LPC micro controller forum, for PCF2129 question, it appear you can post a ticket to the link:</P><P><A href="https://community.nxp.com/community/other">https://community.nxp.com/community/other</A>&nbsp;</P><P></P><P>Hope it can help you</P><P>BR</P><P>Xiangjun Rong</P></BODY></HTML> Wed, 13 Feb 2019 07:10:17 GMT https://community.nxp.com/t5/LPC-Microcontrollers/PCF2129-RTC-with-OM13092/m-p/888667#M35608 xiangjun_rong 2019-02-13T07:10:17Z Re: PCF2129 RTC with OM13092 https://community.nxp.com/t5/LPC-Microcontrollers/PCF2129-RTC-with-OM13092/m-p/888668#M35609 <HTML><HEAD></HEAD><BODY><P>Thank you, this solved my problem.</P></BODY></HTML> Wed, 20 Feb 2019 06:25:44 GMT https://community.nxp.com/t5/LPC-Microcontrollers/PCF2129-RTC-with-OM13092/m-p/888668#M35609 fatihozen 2019-02-20T06:25:44Z