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  <channel>
    <title>In Vehicle NetworkingのトピックRe: UJA1169 transfer from normal mode to standby mode automaticlly</title>
    <link>https://community.nxp.com/t5/In-Vehicle-Networking/UJA1169-transfer-from-normal-mode-to-standby-mode-automaticlly/m-p/2352012#M173</link>
    <description>&lt;P&gt;结合之前的分析来看应该不是没写进去，而是之后喂狗不及时，导致mode回到了standby，所以寄存器的值不正确。&lt;/P&gt;</description>
    <pubDate>Thu, 16 Apr 2026 06:55:09 GMT</pubDate>
    <dc:creator>zyt</dc:creator>
    <dc:date>2026-04-16T06:55:09Z</dc:date>
    <item>
      <title>UJA1169 transfer from normal mode to standby mode automaticlly</title>
      <link>https://community.nxp.com/t5/In-Vehicle-Networking/UJA1169-transfer-from-normal-mode-to-standby-mode-automaticlly/m-p/2351833#M161</link>
      <description>&lt;P&gt;After the&amp;nbsp;UJA1169 go into&amp;nbsp;normal mode some time (about 3 minutes)，it go into&amp;nbsp;standby mode automaticlly, I don't write&amp;nbsp;&lt;SPAN&gt;Mode control register (0x01)&amp;nbsp;, and also kick watchdog periodly. So why does that happen?&lt;/SPAN&gt;&lt;/P&gt;</description>
      <pubDate>Thu, 16 Apr 2026 01:38:17 GMT</pubDate>
      <guid>https://community.nxp.com/t5/In-Vehicle-Networking/UJA1169-transfer-from-normal-mode-to-standby-mode-automaticlly/m-p/2351833#M161</guid>
      <dc:creator>zyt</dc:creator>
      <dc:date>2026-04-16T01:38:17Z</dc:date>
    </item>
    <item>
      <title>Re: UJA1169 transfer from normal mode to standby mode automaticlly</title>
      <link>https://community.nxp.com/t5/In-Vehicle-Networking/UJA1169-transfer-from-normal-mode-to-standby-mode-automaticlly/m-p/2351865#M162</link>
      <description>&lt;P&gt;您使用的是UJA1169 还是UJA1169A?&lt;/P&gt;</description>
      <pubDate>Thu, 16 Apr 2026 02:13:14 GMT</pubDate>
      <guid>https://community.nxp.com/t5/In-Vehicle-Networking/UJA1169-transfer-from-normal-mode-to-standby-mode-automaticlly/m-p/2351865#M162</guid>
      <dc:creator>guoweisun</dc:creator>
      <dc:date>2026-04-16T02:13:14Z</dc:date>
    </item>
    <item>
      <title>Re: UJA1169 transfer from normal mode to standby mode automaticlly</title>
      <link>https://community.nxp.com/t5/In-Vehicle-Networking/UJA1169-transfer-from-normal-mode-to-standby-mode-automaticlly/m-p/2351867#M163</link>
      <description>&lt;P&gt;&lt;SPAN&gt;是UJA1169A&lt;/SPAN&gt;&lt;/P&gt;</description>
      <pubDate>Thu, 16 Apr 2026 02:15:31 GMT</pubDate>
      <guid>https://community.nxp.com/t5/In-Vehicle-Networking/UJA1169-transfer-from-normal-mode-to-standby-mode-automaticlly/m-p/2351867#M163</guid>
      <dc:creator>zyt</dc:creator>
      <dc:date>2026-04-16T02:15:31Z</dc:date>
    </item>
    <item>
      <title>Re: UJA1169 transfer from normal mode to standby mode automaticlly</title>
      <link>https://community.nxp.com/t5/In-Vehicle-Networking/UJA1169-transfer-from-normal-mode-to-standby-mode-automaticlly/m-p/2351869#M164</link>
      <description>&lt;DIV&gt;
&lt;H3&gt;一旦进入 Standby，立刻读 &lt;STRONG&gt;0x03 Main status&lt;/STRONG&gt; 的 RSS&lt;/H3&gt;
&lt;P&gt;读 &lt;STRONG&gt;0x03&lt;/STRONG&gt;，看 RSS 是哪个码：&lt;/P&gt;
&lt;span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="guoweisun_0-1776305898914.png" style="width: 400px;"&gt;&lt;img src="https://community.nxp.com/t5/image/serverpage/image-id/382527i0EA692CD50F275EF/image-size/medium?v=v2&amp;amp;px=400" role="button" title="guoweisun_0-1776305898914.png" alt="guoweisun_0-1776305898914.png" /&gt;&lt;/span&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;/DIV&gt;</description>
      <pubDate>Thu, 16 Apr 2026 02:18:34 GMT</pubDate>
      <guid>https://community.nxp.com/t5/In-Vehicle-Networking/UJA1169-transfer-from-normal-mode-to-standby-mode-automaticlly/m-p/2351869#M164</guid>
      <dc:creator>guoweisun</dc:creator>
      <dc:date>2026-04-16T02:18:34Z</dc:date>
    </item>
    <item>
      <title>Re: UJA1169 transfer from normal mode to standby mode automaticlly</title>
      <link>https://community.nxp.com/t5/In-Vehicle-Networking/UJA1169-transfer-from-normal-mode-to-standby-mode-automaticlly/m-p/2351879#M165</link>
      <description>&lt;P&gt;我这边可能没法第一时间读出，只能是发现之后再去读一下。&lt;/P&gt;&lt;P&gt;这次读出来是0xf，对应起来是watchdog overflow。&lt;/P&gt;&lt;P&gt;但实际喂狗动作一直是在执行的，而且发生这种状况时，是启动后分钟级别的时间，而watchdog是毫秒级别的。&lt;/P&gt;&lt;P&gt;那么这可能是什么原因？&lt;/P&gt;</description>
      <pubDate>Thu, 16 Apr 2026 02:36:21 GMT</pubDate>
      <guid>https://community.nxp.com/t5/In-Vehicle-Networking/UJA1169-transfer-from-normal-mode-to-standby-mode-automaticlly/m-p/2351879#M165</guid>
      <dc:creator>zyt</dc:creator>
      <dc:date>2026-04-16T02:36:21Z</dc:date>
    </item>
    <item>
      <title>Re: UJA1169 transfer from normal mode to standby mode automaticlly</title>
      <link>https://community.nxp.com/t5/In-Vehicle-Networking/UJA1169-transfer-from-normal-mode-to-standby-mode-automaticlly/m-p/2351893#M166</link>
      <description>&lt;DIV&gt;
&lt;UL&gt;
&lt;LI&gt;你现在读到的 &lt;STRONG&gt;0x00（Watchdog control）寄存器值是多少&lt;/STRONG&gt;？（我主要看 WMC 和 NWP）&lt;/LI&gt;
&lt;LI&gt;你喂狗的方式是：&lt;STRONG&gt;每次都写固定值到 0x00&lt;/STRONG&gt;，还是写入会随时间变化（例如改 NWP、改 WMC）？&lt;/LI&gt;
&lt;/UL&gt;
&lt;/DIV&gt;</description>
      <pubDate>Thu, 16 Apr 2026 03:07:51 GMT</pubDate>
      <guid>https://community.nxp.com/t5/In-Vehicle-Networking/UJA1169-transfer-from-normal-mode-to-standby-mode-automaticlly/m-p/2351893#M166</guid>
      <dc:creator>guoweisun</dc:creator>
      <dc:date>2026-04-16T03:07:51Z</dc:date>
    </item>
    <item>
      <title>Re: UJA1169 transfer from normal mode to standby mode automaticlly</title>
      <link>https://community.nxp.com/t5/In-Vehicle-Networking/UJA1169-transfer-from-normal-mode-to-standby-mode-automaticlly/m-p/2351899#M167</link>
      <description>&lt;P&gt;0x00在初始化时会设置为0x2b，然后进入normal mode。&lt;/P&gt;&lt;P&gt;喂狗就是将0x00读出来再写进去。&lt;/P&gt;&lt;P&gt;&lt;span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="zyt_0-1776309877911.png" style="width: 400px;"&gt;&lt;img src="https://community.nxp.com/t5/image/serverpage/image-id/382530iAAB3FDEDC6669D2A/image-size/medium?v=v2&amp;amp;px=400" role="button" title="zyt_0-1776309877911.png" alt="zyt_0-1776309877911.png" /&gt;&lt;/span&gt;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;现在进入standby后，0x00变成了0x44，这应该是默认值。&lt;/P&gt;</description>
      <pubDate>Thu, 16 Apr 2026 03:26:48 GMT</pubDate>
      <guid>https://community.nxp.com/t5/In-Vehicle-Networking/UJA1169-transfer-from-normal-mode-to-standby-mode-automaticlly/m-p/2351899#M167</guid>
      <dc:creator>zyt</dc:creator>
      <dc:date>2026-04-16T03:26:48Z</dc:date>
    </item>
    <item>
      <title>Re: UJA1169 transfer from normal mode to standby mode automaticlly</title>
      <link>https://community.nxp.com/t5/In-Vehicle-Networking/UJA1169-transfer-from-normal-mode-to-standby-mode-automaticlly/m-p/2351914#M168</link>
      <description>&lt;DIV&gt;尝试下把 NWP 改成 1024ms 或 4096ms看看问题还存在吗？&lt;/DIV&gt;</description>
      <pubDate>Thu, 16 Apr 2026 03:48:59 GMT</pubDate>
      <guid>https://community.nxp.com/t5/In-Vehicle-Networking/UJA1169-transfer-from-normal-mode-to-standby-mode-automaticlly/m-p/2351914#M168</guid>
      <dc:creator>guoweisun</dc:creator>
      <dc:date>2026-04-16T03:48:59Z</dc:date>
    </item>
    <item>
      <title>Re: UJA1169 transfer from normal mode to standby mode automaticlly</title>
      <link>https://community.nxp.com/t5/In-Vehicle-Networking/UJA1169-transfer-from-normal-mode-to-standby-mode-automaticlly/m-p/2351951#M169</link>
      <description>&lt;P&gt;改成&lt;SPAN&gt;1024ms之后，目前大概一个小时，依然还是normal mode。&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;但1024ms有点太长了，我觉得即使继续测试下去没问题也不太适合作为解决办法，还有什么其它方案吗？&lt;/SPAN&gt;&lt;/P&gt;</description>
      <pubDate>Thu, 16 Apr 2026 05:27:36 GMT</pubDate>
      <guid>https://community.nxp.com/t5/In-Vehicle-Networking/UJA1169-transfer-from-normal-mode-to-standby-mode-automaticlly/m-p/2351951#M169</guid>
      <dc:creator>zyt</dc:creator>
      <dc:date>2026-04-16T05:27:36Z</dc:date>
    </item>
    <item>
      <title>Re: UJA1169 transfer from normal mode to standby mode automaticlly</title>
      <link>https://community.nxp.com/t5/In-Vehicle-Networking/UJA1169-transfer-from-normal-mode-to-standby-mode-automaticlly/m-p/2351969#M170</link>
      <description>&lt;DIV&gt;
&lt;UL&gt;
&lt;LI&gt;尝试下 在 MCU 启动流程中，一旦 &lt;STRONG&gt;SPI 可用&lt;/STRONG&gt;（驱动初始化完成、CS/时钟稳定），立刻做一次 &lt;STRONG&gt;watchdog trigger write&lt;/STRONG&gt;（写 Watchdog control register）。datasheet 明确：有效写 Watchdog control register 是 trigger 事件。&lt;/LI&gt;
&lt;LI&gt;&lt;span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="guoweisun_0-1776319369729.png" style="width: 400px;"&gt;&lt;img src="https://community.nxp.com/t5/image/serverpage/image-id/382556iECB173379291F269/image-size/medium?v=v2&amp;amp;px=400" role="button" title="guoweisun_0-1776319369729.png" alt="guoweisun_0-1776319369729.png" /&gt;&lt;/span&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;/LI&gt;
&lt;LI&gt;不要等 OS 启动、应用任务起来、通信栈 ready 才第一次喂狗——这些都不确定，这个有可能是你“3分钟后出错的原因&lt;/LI&gt;
&lt;/UL&gt;
&lt;/DIV&gt;</description>
      <pubDate>Thu, 16 Apr 2026 06:03:20 GMT</pubDate>
      <guid>https://community.nxp.com/t5/In-Vehicle-Networking/UJA1169-transfer-from-normal-mode-to-standby-mode-automaticlly/m-p/2351969#M170</guid>
      <dc:creator>guoweisun</dc:creator>
      <dc:date>2026-04-16T06:03:20Z</dc:date>
    </item>
    <item>
      <title>Re: UJA1169 transfer from normal mode to standby mode automaticlly</title>
      <link>https://community.nxp.com/t5/In-Vehicle-Networking/UJA1169-transfer-from-normal-mode-to-standby-mode-automaticlly/m-p/2351985#M171</link>
      <description>&lt;P&gt;这就涉及到另外一个问题，就是这里提出的：&lt;/P&gt;&lt;P&gt;&lt;A href="https://community.nxp.com/t5/S32K/UJA1169-can-not-write-Mode-control-register-0x01-with-S32k312/m-p/2350811#M57959" target="_blank"&gt;UJA1169 can not write Mode control register (0x01) with S32k312&lt;/A&gt;&lt;/P&gt;&lt;P&gt;在初始化的时候，读写&lt;SPAN&gt;Lock control register (Address: 0x0A)是正常的，写入值和读值一样。&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;但是写入watchdog register/Mode control register，发现读出的值依然是默认值，而不是写入值。这样SBC无法进入normal mode。&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;我是在之后又执行了一次同样的动作才能正常写入，进入normal mode，从而进行到现在的状态。&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;喂狗也是一样的现象，最开始喂的时候，值是没变的。&lt;/SPAN&gt;&lt;/P&gt;</description>
      <pubDate>Thu, 16 Apr 2026 06:28:17 GMT</pubDate>
      <guid>https://community.nxp.com/t5/In-Vehicle-Networking/UJA1169-transfer-from-normal-mode-to-standby-mode-automaticlly/m-p/2351985#M171</guid>
      <dc:creator>zyt</dc:creator>
      <dc:date>2026-04-16T06:28:17Z</dc:date>
    </item>
    <item>
      <title>Re: UJA1169 transfer from normal mode to standby mode automaticlly</title>
      <link>https://community.nxp.com/t5/In-Vehicle-Networking/UJA1169-transfer-from-normal-mode-to-standby-mode-automaticlly/m-p/2351993#M172</link>
      <description>&lt;P&gt;所以第一次写不进去&lt;SPAN&gt;watchdog register/Mode control register的问题一直存在?&lt;/SPAN&gt;&lt;/P&gt;</description>
      <pubDate>Thu, 16 Apr 2026 06:36:41 GMT</pubDate>
      <guid>https://community.nxp.com/t5/In-Vehicle-Networking/UJA1169-transfer-from-normal-mode-to-standby-mode-automaticlly/m-p/2351993#M172</guid>
      <dc:creator>guoweisun</dc:creator>
      <dc:date>2026-04-16T06:36:41Z</dc:date>
    </item>
    <item>
      <title>Re: UJA1169 transfer from normal mode to standby mode automaticlly</title>
      <link>https://community.nxp.com/t5/In-Vehicle-Networking/UJA1169-transfer-from-normal-mode-to-standby-mode-automaticlly/m-p/2352012#M173</link>
      <description>&lt;P&gt;结合之前的分析来看应该不是没写进去，而是之后喂狗不及时，导致mode回到了standby，所以寄存器的值不正确。&lt;/P&gt;</description>
      <pubDate>Thu, 16 Apr 2026 06:55:09 GMT</pubDate>
      <guid>https://community.nxp.com/t5/In-Vehicle-Networking/UJA1169-transfer-from-normal-mode-to-standby-mode-automaticlly/m-p/2352012#M173</guid>
      <dc:creator>zyt</dc:creator>
      <dc:date>2026-04-16T06:55:09Z</dc:date>
    </item>
    <item>
      <title>Re: UJA1169 transfer from normal mode to standby mode automaticlly</title>
      <link>https://community.nxp.com/t5/In-Vehicle-Networking/UJA1169-transfer-from-normal-mode-to-standby-mode-automaticlly/m-p/2352019#M174</link>
      <description>&lt;P&gt;&lt;A href="https://community.nxp.com/t5/S32K/UJA1169-can-not-write-Mode-control-register-0x01-with-S32k312/m-p/2350811#M57959" target="_blank"&gt;UJA1169 can not write Mode control register (0x01) with S32k312&lt;/A&gt;&lt;/P&gt;
&lt;P&gt;所以还是这个topic的issue没解决导致的。&lt;/P&gt;
&lt;P&gt;你再催一下这个topic的回复。&lt;/P&gt;</description>
      <pubDate>Thu, 16 Apr 2026 06:58:39 GMT</pubDate>
      <guid>https://community.nxp.com/t5/In-Vehicle-Networking/UJA1169-transfer-from-normal-mode-to-standby-mode-automaticlly/m-p/2352019#M174</guid>
      <dc:creator>guoweisun</dc:creator>
      <dc:date>2026-04-16T06:58:39Z</dc:date>
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