https://community.nxp.com/t5/i-MX-RT-Crossover-MCUs/RT1052%E7%9A%84POR%E5%BC%95%E8%84%9A%E7%9A%84RESET%E9%97%AE%E9%A2%98/m-p/2326040#M36281 <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="POR原理图.png" style="width: 984px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/378307i16B9D69B861C9F14/image-size/large?v=v2&amp;px=999" role="button" title="POR原理图.png" alt="POR原理图.png" /></span></P> Wed, 04 Mar 2026 07:54:55 GMT FromCH0 2026-03-04T07:54:55Z https://community.nxp.com/t5/i-MX-RT-Crossover-MCUs/RT1052%E7%9A%84POR%E5%BC%95%E8%84%9A%E7%9A%84RESET%E9%97%AE%E9%A2%98/m-p/2326034#M36279 <P>尊敬的NXP:</P><P>&nbsp; &nbsp; &nbsp; RT1052是款性价比很高的主控。很高兴有机会用它来开发产品！</P><P>&nbsp; &nbsp; &nbsp; 想请教您们复位方面的问题。贵公司RT1052开发板是通过UM803RS来实现对电压监视和复位的。如果用纽扣电池对VDD_SNVY_IN引脚供电，以实现最低的要求的RTC等运行（日期计算功能）。UM803RS需要接VDD_SNVY_IN引脚供电吗？下图中，POR除了初期下拉之后，后续一直是高电平：<span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="上电下电时序.png" style="width: 760px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/378305iD1B7F014EF3314F0/image-size/large?v=v2&amp;px=999" role="button" title="上电下电时序.png" alt="上电下电时序.png" /></span></P><P>如果UM803RS不接VDD_SNVY_IN引脚供电，RESET引脚输出状态未知，是否会影响RTC的正常运行？我上网查了些资料，说UM803RS要接VDD_SNVY_IN引脚供电，而且，RESET引脚需要用VDD_SNVY_IN上拉。</P> Wed, 04 Mar 2026 07:49:08 GMT https://community.nxp.com/t5/i-MX-RT-Crossover-MCUs/RT1052%E7%9A%84POR%E5%BC%95%E8%84%9A%E7%9A%84RESET%E9%97%AE%E9%A2%98/m-p/2326034#M36279 FromCH0 2026-03-04T07:49:08Z https://community.nxp.com/t5/i-MX-RT-Crossover-MCUs/RT1052%E7%9A%84POR%E5%BC%95%E8%84%9A%E7%9A%84RESET%E9%97%AE%E9%A2%98/m-p/2326037#M36280 <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="POR原理图.png" style="width: 0px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/378306iEBFF3C4E3029087D/image-size/small?v=v2&amp;px=200" width="0" height="0" role="button" title="POR原理图.png" alt="POR原理图.png" /></span></P><P>这是NXP的RT1052开发板的原理图（POR相关部分）。</P> Wed, 04 Mar 2026 07:52:37 GMT https://community.nxp.com/t5/i-MX-RT-Crossover-MCUs/RT1052%E7%9A%84POR%E5%BC%95%E8%84%9A%E7%9A%84RESET%E9%97%AE%E9%A2%98/m-p/2326037#M36280 FromCH0 2026-03-04T07:52:37Z https://community.nxp.com/t5/i-MX-RT-Crossover-MCUs/RT1052%E7%9A%84POR%E5%BC%95%E8%84%9A%E7%9A%84RESET%E9%97%AE%E9%A2%98/m-p/2326040#M36281 <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="POR原理图.png" style="width: 984px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/378307i16B9D69B861C9F14/image-size/large?v=v2&amp;px=999" role="button" title="POR原理图.png" alt="POR原理图.png" /></span></P> Wed, 04 Mar 2026 07:54:55 GMT https://community.nxp.com/t5/i-MX-RT-Crossover-MCUs/RT1052%E7%9A%84POR%E5%BC%95%E8%84%9A%E7%9A%84RESET%E9%97%AE%E9%A2%98/m-p/2326040#M36281 FromCH0 2026-03-04T07:54:55Z https://community.nxp.com/t5/i-MX-RT-Crossover-MCUs/RT1052%E7%9A%84POR%E5%BC%95%E8%84%9A%E7%9A%84RESET%E9%97%AE%E9%A2%98/m-p/2326701#M36292 <P>Hi&nbsp;<a href="https://community.nxp.com/t5/user/viewprofilepage/user-id/191688">@FromCH0</a>&nbsp;,</P> <P>&nbsp;</P> <P><SPAN data-teams="true">复位芯片不需要接VDD_SNVY_IN引脚供电，只有Por_B需要上拉到VDD_SNVY_IN，而且那个上拉电阻可以不贴的，芯片内部有上拉的。详见附件。</SPAN></P> <P>&nbsp;</P> <P>Have a great day,<BR />Kan</P> <P><BR />-------------------------------------------------------------------------------<BR />Note:<BR />- If this post answers your question, please click the "Mark Correct" button. Thank you!<BR />- We are following threads for 7 weeks after the last post, later replies are ignored<BR />Please open a new thread and refer to the closed one, if you have a related question at a later point in time.<BR />-------------------------------------------------------------------------------</P> Thu, 05 Mar 2026 03:15:27 GMT https://community.nxp.com/t5/i-MX-RT-Crossover-MCUs/RT1052%E7%9A%84POR%E5%BC%95%E8%84%9A%E7%9A%84RESET%E9%97%AE%E9%A2%98/m-p/2326701#M36292 Kan_Li 2026-03-05T03:15:27Z https://community.nxp.com/t5/i-MX-RT-Crossover-MCUs/RT1052%E7%9A%84POR%E5%BC%95%E8%84%9A%E7%9A%84RESET%E9%97%AE%E9%A2%98/m-p/2326707#M36293 <P>谢了</P> Thu, 05 Mar 2026 03:38:12 GMT https://community.nxp.com/t5/i-MX-RT-Crossover-MCUs/RT1052%E7%9A%84POR%E5%BC%95%E8%84%9A%E7%9A%84RESET%E9%97%AE%E9%A2%98/m-p/2326707#M36293 FromCH0 2026-03-05T03:38:12Z