topic LPC11U68 JTAG conenction in LPC Microcontrollers https://community.nxp.com/t5/LPC-Microcontrollers/LPC11U68-JTAG-conenction/m-p/918210#M36639 <HTML><HEAD></HEAD><BODY><P>Hi. I've been given a LPC11U68 based design to create a JTAG test for. I cannot get it to be recognised by an XJTAG probe. I have noticed the designer has connected the JTAG TMS signal to the SWDIO pin as the user guide states</P><P></P><P>SWDIO — Serial Wire Debug I/O. SWDIO is enabled by default on this pin. In boundary scan mode: TMS (Test<BR />Mode Select).</P><P></P><P>And yet there is a dedicated TMS pin</P><P></P><P>TMS — Test Mode Select for JTAG interface. In boundary scan mode only.</P><P></P><P>Could this be the problem? What is different about the TMS function of these pins?</P><P></P><P>Geoff</P></BODY></HTML> Tue, 13 Aug 2019 17:05:31 GMT geoff_collins 2019-08-13T17:05:31Z LPC11U68 JTAG conenction https://community.nxp.com/t5/LPC-Microcontrollers/LPC11U68-JTAG-conenction/m-p/918210#M36639 <HTML><HEAD></HEAD><BODY><P>Hi. I've been given a LPC11U68 based design to create a JTAG test for. I cannot get it to be recognised by an XJTAG probe. I have noticed the designer has connected the JTAG TMS signal to the SWDIO pin as the user guide states</P><P></P><P>SWDIO — Serial Wire Debug I/O. SWDIO is enabled by default on this pin. In boundary scan mode: TMS (Test<BR />Mode Select).</P><P></P><P>And yet there is a dedicated TMS pin</P><P></P><P>TMS — Test Mode Select for JTAG interface. In boundary scan mode only.</P><P></P><P>Could this be the problem? What is different about the TMS function of these pins?</P><P></P><P>Geoff</P></BODY></HTML> Tue, 13 Aug 2019 17:05:31 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPC11U68-JTAG-conenction/m-p/918210#M36639 geoff_collins 2019-08-13T17:05:31Z Re: LPC11U68 JTAG conenction https://community.nxp.com/t5/LPC-Microcontrollers/LPC11U68-JTAG-conenction/m-p/918211#M36640 <HTML><HEAD></HEAD><BODY><P>Hi,&nbsp;</P><P></P><P>Please check the following link:&nbsp;</P><P><A href="https://community.nxp.com/thread/388998">https://community.nxp.com/thread/388998</A>&nbsp;</P><P></P><P>I hope this helps, have a nice day!</P><P>Regards&nbsp;</P><P>Soledad</P></BODY></HTML> Tue, 13 Aug 2019 18:23:19 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPC11U68-JTAG-conenction/m-p/918211#M36640 soledad 2019-08-13T18:23:19Z