https://community.nxp.com/t5/S32K/S32K142-disable-debug/m-p/2195009#M53940 <P>你好，我将FSEC中的SEC置为11：</P><P><SPAN>/* Flash Configuration */</SPAN><BR /><SPAN>.section .FlashConfig, "a"</SPAN><BR /><SPAN>.long 0xFFFFFFFF /* 8 bytes backdoor comparison key */</SPAN><BR /><SPAN>.long 0xFFFFFFFF /* */</SPAN><BR /><SPAN>.long 0xFFFFFFFF /* 4 bytes program flash protection bytes */</SPAN><BR /><SPAN>.long 0xFFFF7FFF /* FDPROT:FEPROT:FOPT:FSEC(0xFE = unsecured) */</SPAN></P><P><SPAN>使用J-Flash，选择S32K142（allow security），将程序烧录至芯片后，可以再次与芯片连接和烧录程序（一开始无法连接，尝试2至3次后可以正常连接），但无法debug和读取flash内容，请问这是否为成功失能调试端口？</SPAN></P> Wed, 29 Oct 2025 09:28:42 GMT minsky 2025-10-29T09:28:42Z https://community.nxp.com/t5/S32K/S32K142-disable-debug/m-p/2195009#M53940 <P>你好，我将FSEC中的SEC置为11：</P><P><SPAN>/* Flash Configuration */</SPAN><BR /><SPAN>.section .FlashConfig, "a"</SPAN><BR /><SPAN>.long 0xFFFFFFFF /* 8 bytes backdoor comparison key */</SPAN><BR /><SPAN>.long 0xFFFFFFFF /* */</SPAN><BR /><SPAN>.long 0xFFFFFFFF /* 4 bytes program flash protection bytes */</SPAN><BR /><SPAN>.long 0xFFFF7FFF /* FDPROT:FEPROT:FOPT:FSEC(0xFE = unsecured) */</SPAN></P><P><SPAN>使用J-Flash，选择S32K142（allow security），将程序烧录至芯片后，可以再次与芯片连接和烧录程序（一开始无法连接，尝试2至3次后可以正常连接），但无法debug和读取flash内容，请问这是否为成功失能调试端口？</SPAN></P> Wed, 29 Oct 2025 09:28:42 GMT https://community.nxp.com/t5/S32K/S32K142-disable-debug/m-p/2195009#M53940 minsky 2025-10-29T09:28:42Z https://community.nxp.com/t5/S32K/S32K142-disable-debug/m-p/2196024#M54004 <P>Hi&nbsp;<a href="https://community.nxp.com/t5/user/viewprofilepage/user-id/254381">@minsky</a>,</P> <P>Yes, once secured, JTAG&nbsp;cannot read flash or halt/inspect the core. Changes to the flash configuration will take effect at the next reset:</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Snag_56e136.png" style="width: 400px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/363306i9C10AB12B964F68E/image-size/medium?v=v2&amp;px=400" role="button" title="Snag_56e136.png" alt="Snag_56e136.png" /></span></P> <P>Also, when allow security is selected, J-Flash reads MDM-AP register, and if security is set to 1, it tries a mass erase in order to unsecure the chip and connect.</P> <P>Best regards,<BR />Julián</P> Thu, 30 Oct 2025 17:34:37 GMT https://community.nxp.com/t5/S32K/S32K142-disable-debug/m-p/2196024#M54004 Julián_AragónM 2025-10-30T17:34:37Z