TC321x Secure Debug: how to re-enable SWS with the debug key (datasheet 18.4.2)?

TL_SUNPENG

<div class="quote"><blockquote><font size="2"><a href="https://forum.telink-semi.cn/forum.php?mod=redirect&goto=findpost&pid=102979&ptid=98922" target="_blank"><font color="#999999">Alex Kafando 发表于 2026-9-28 23:37</font></a></font>  Okay, here is my wirin ...</blockquote></div> The wiring is correct. Could you share your firmware so I can try to reproduce the issue on a development board? That way, the only difference left between our setups would be the DUT hardware. Besides that, does your firmware have any sleep in it? If yes, about how long after starting does it go to sleep? Provided that the SWS pin on the DUT is not shared with any other function and the chip has not entered sleep mode, you may use the programmer below to flash the custom firmware. After the update is finished, perform a power cycle and then click the "Re-enable" button. The procedure for updating the programmer is as follows: click **Help → Upgrade**; click **Load** and select the provided firmware image; then click **Upgrade** to begin the upgrade.   [ProrammerFW202609291043.7z](https://forum.telink-semi.cn/forum.php?mod=attachment&aid=MjQxNHxlYjdiMWVlZHwxNzkwNjUwMzIzfDY2fDA%3D) <i class="pstatus"> 本帖最后由 TL_SUNPENG 于 2026-9-29 10:55 编辑 </i><br /> <br />

Alex Kafando

Thank you. I will try the programmer firmware. Is it compatible with Programmer V1-V3 (pid\_8266)? According to our hardware config, PA3 is reserved for SWS on our board and not shared. Our firmware has a deep sleep state, but I have not measured the delay. The test code busy-waits 30 s after each power-up. Our product firmware is confidential, so I can send a minimal firmware that only writes the two eFuse values, if that helps. <i class="pstatus"> 本帖最后由 Alex Kafando 于 2026-9-29 15:50 编辑 </i><br /> <br />