https://community.nxp.com/t5/PowerQUICC-Processors/what-s-problem-about-fs26-debug-pin-connect-VBOS-directly/m-p/2366727#M5000 debug pin connect VBOS directly will cause fs26 enter OTP mode permanently , can't exit debug by sending spi exit-debug command, correct ? where can find this proof in fs26 date sheet?<BR /> Mon, 18 May 2026 07:39:26 GMT yang_yang3920 2026-05-18T07:39:26Z https://community.nxp.com/t5/PowerQUICC-Processors/what-s-problem-about-fs26-debug-pin-connect-VBOS-directly/m-p/2366707#M4998 <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="yang_yang3920_0-1779088512112.png" style="width: 400px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/385705i5EFAB6C06855875B/image-size/medium?v=v2&amp;px=400" role="button" title="yang_yang3920_0-1779088512112.png" alt="yang_yang3920_0-1779088512112.png" /></span></P><P>&nbsp;</P> Mon, 18 May 2026 07:16:37 GMT https://community.nxp.com/t5/PowerQUICC-Processors/what-s-problem-about-fs26-debug-pin-connect-VBOS-directly/m-p/2366707#M4998 yang_yang3920 2026-05-18T07:16:37Z https://community.nxp.com/t5/PowerQUICC-Processors/what-s-problem-about-fs26-debug-pin-connect-VBOS-directly/m-p/2366720#M4999 <DIV>it’s risky and often wrong to tie the FS26 DEBUG pin directly to VBOS, because the DEBUG pin is not a power input—it is a logic/debug interface pin with strict voltage and driving requirements.</DIV> <DIV>&nbsp;</DIV> <DIV> <DIV>DEBUG pin must be driven by a controlled logic level (VDIG domain), never directly tied to VBOS.</DIV> </DIV> Mon, 18 May 2026 07:27:27 GMT https://community.nxp.com/t5/PowerQUICC-Processors/what-s-problem-about-fs26-debug-pin-connect-VBOS-directly/m-p/2366720#M4999 yipingwang 2026-05-18T07:27:27Z https://community.nxp.com/t5/PowerQUICC-Processors/what-s-problem-about-fs26-debug-pin-connect-VBOS-directly/m-p/2366727#M5000 debug pin connect VBOS directly will cause fs26 enter OTP mode permanently , can't exit debug by sending spi exit-debug command, correct ? where can find this proof in fs26 date sheet?<BR /> Mon, 18 May 2026 07:39:26 GMT https://community.nxp.com/t5/PowerQUICC-Processors/what-s-problem-about-fs26-debug-pin-connect-VBOS-directly/m-p/2366727#M5000 yang_yang3920 2026-05-18T07:39:26Z https://community.nxp.com/t5/PowerQUICC-Processors/what-s-problem-about-fs26-debug-pin-connect-VBOS-directly/m-p/2366735#M5001 <P>Please put fs26 related question in the following block.</P> <P><A href="https://community.nxp.com/t5/Power-Management/bd-p/Power-Management" target="_blank">https://community.nxp.com/t5/Power-Management/bd-p/Power-Management</A></P> Mon, 18 May 2026 07:53:01 GMT https://community.nxp.com/t5/PowerQUICC-Processors/what-s-problem-about-fs26-debug-pin-connect-VBOS-directly/m-p/2366735#M5001 yipingwang 2026-05-18T07:53:01Z