https://community.nxp.com/t5/Other-NXP-Products/PCA2131-Read-time-error/m-p/1981973#M26075 <P>原理图能看下吗？<BR /><BR /></P> Fri, 25 Oct 2024 10:49:17 GMT guoweisun 2024-10-25T10:49:17Z https://community.nxp.com/t5/Other-NXP-Products/PCA2131-Read-time-error/m-p/1972186#M25897 <P><FONT>#PCA2131# After writing registers ctrl2, ctrl3 and ctrl4, read the date and time register immediately and get the wrong value. But after a certain delay, the value is correct. The Datasheet doesn't cover that.</FONT></P> Fri, 11 Oct 2024 12:40:45 GMT https://community.nxp.com/t5/Other-NXP-Products/PCA2131-Read-time-error/m-p/1972186#M25897 yifei_cheng 2024-10-11T12:40:45Z https://community.nxp.com/t5/Other-NXP-Products/PCA2131-Read-time-error/m-p/1972553#M25902 <P>这个RTC寄存器的的读写要在上电以后等500ms以后再去操作，不然通信还没有建立。</P> Sat, 12 Oct 2024 05:44:17 GMT https://community.nxp.com/t5/Other-NXP-Products/PCA2131-Read-time-error/m-p/1972553#M25902 guoweisun 2024-10-12T05:44:17Z https://community.nxp.com/t5/Other-NXP-Products/PCA2131-Read-time-error/m-p/1972620#M25905 <P>好的，感谢您的解答。此外，我有一些问题请教您：</P><P>1.SPI通信时读取时间偶尔成功，偶尔读取到错误的无效的时间数据，是什么原因呢？</P><P>2.在SPI读取数据时，SDI线上的数据在发送完指令以及地址后必须继续发送0直到读取数据完成吗？</P> Sat, 12 Oct 2024 08:34:34 GMT https://community.nxp.com/t5/Other-NXP-Products/PCA2131-Read-time-error/m-p/1972620#M25905 yifei_cheng 2024-10-12T08:34:34Z https://community.nxp.com/t5/Other-NXP-Products/PCA2131-Read-time-error/m-p/1972856#M25912 <P>1：查看原理图是被否正确，考虑下面的稳定以后再操作寄存器：</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="guoweisun_0-1728869946656.png" style="width: 400px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/304423i4DD972AF4346F4CB/image-size/medium?v=v2&amp;px=400" role="button" title="guoweisun_0-1728869946656.png" alt="guoweisun_0-1728869946656.png" /></span></P> <P>2：按照DS上的读写详细操作执行：</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="guoweisun_1-1728870074178.png" style="width: 400px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/304424i944F8B58AB5EB901/image-size/medium?v=v2&amp;px=400" role="button" title="guoweisun_1-1728870074178.png" alt="guoweisun_1-1728870074178.png" /></span></P> <P>&nbsp;</P> Mon, 14 Oct 2024 01:41:20 GMT https://community.nxp.com/t5/Other-NXP-Products/PCA2131-Read-time-error/m-p/1972856#M25912 guoweisun 2024-10-14T01:41:20Z https://community.nxp.com/t5/Other-NXP-Products/PCA2131-Read-time-error/m-p/1981940#M26072 您好！调试PCA2131时遇到一个问题，用1ms的速度获取日期，会使VCU无法通过KEYON下电，但10ms读取一次时间，是不会有问题的；PCA2131芯片的VDD供电是通过SBC供的常电，VCU 通过KEYON下电，VDD一直是有电的。 Fri, 25 Oct 2024 09:48:51 GMT https://community.nxp.com/t5/Other-NXP-Products/PCA2131-Read-time-error/m-p/1981940#M26072 清清 2024-10-25T09:48:51Z https://community.nxp.com/t5/Other-NXP-Products/PCA2131-Read-time-error/m-p/1981973#M26075 <P>原理图能看下吗？<BR /><BR /></P> Fri, 25 Oct 2024 10:49:17 GMT https://community.nxp.com/t5/Other-NXP-Products/PCA2131-Read-time-error/m-p/1981973#M26075 guoweisun 2024-10-25T10:49:17Z https://community.nxp.com/t5/Other-NXP-Products/PCA2131-Read-time-error/m-p/1981979#M26076 <P>原理图的VDD是常电</P> Fri, 25 Oct 2024 10:58:38 GMT https://community.nxp.com/t5/Other-NXP-Products/PCA2131-Read-time-error/m-p/1981979#M26076 清清 2024-10-25T10:58:38Z https://community.nxp.com/t5/Other-NXP-Products/PCA2131-Read-time-error/m-p/1981981#M26077 <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="_0-1729854058232.png" style="width: 299px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/306991i05F84AD70F7F6126/image-dimensions/299x275?v=v2" width="299" height="275" role="button" title="_0-1729854058232.png" alt="_0-1729854058232.png" /></span></P> Fri, 25 Oct 2024 11:02:34 GMT https://community.nxp.com/t5/Other-NXP-Products/PCA2131-Read-time-error/m-p/1981981#M26077 清清 2024-10-25T11:02:34Z https://community.nxp.com/t5/Other-NXP-Products/PCA2131-Read-time-error/m-p/1982435#M26089 <P>我仔细看了这个case之前已经被关掉了，这里您如果是想重新打开的话建议再开一个帖子或者直接提交一个ticket：</P> <P><A href="https://support.nxp.com/s/?language=en_US" target="_blank">Home</A></P> Sun, 27 Oct 2024 00:39:21 GMT https://community.nxp.com/t5/Other-NXP-Products/PCA2131-Read-time-error/m-p/1982435#M26089 guoweisun 2024-10-27T00:39:21Z