topic JTAG Signals on K66F in Kinetis Microcontrollers https://community.nxp.com/t5/Kinetis-Microcontrollers/JTAG-Signals-on-K66F/m-p/728360#M44544 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>I am using K66F for our controller and have the following questions:</P><P>PTA0~~PTA4 is used as JTAG to program MCU by PE tool and it works fine in our controller.</P><P></P><P>Can I re-use these signals for other purpose, like UART0 or FTM, and etc? It can be re-configured after programming?</P><P></P><P>Thanks,</P><P></P><P>Christie</P></BODY></HTML> Wed, 07 Feb 2018 21:09:10 GMT a8Chcx 2018-02-07T21:09:10Z JTAG Signals on K66F https://community.nxp.com/t5/Kinetis-Microcontrollers/JTAG-Signals-on-K66F/m-p/728360#M44544 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>I am using K66F for our controller and have the following questions:</P><P>PTA0~~PTA4 is used as JTAG to program MCU by PE tool and it works fine in our controller.</P><P></P><P>Can I re-use these signals for other purpose, like UART0 or FTM, and etc? It can be re-configured after programming?</P><P></P><P>Thanks,</P><P></P><P>Christie</P></BODY></HTML> Wed, 07 Feb 2018 21:09:10 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/JTAG-Signals-on-K66F/m-p/728360#M44544 a8Chcx 2018-02-07T21:09:10Z Re: JTAG Signals on K66F https://community.nxp.com/t5/Kinetis-Microcontrollers/JTAG-Signals-on-K66F/m-p/728361#M44545 <HTML><HEAD></HEAD><BODY><P>Yes. But not recommend.<BR />You may meet some problem next time you want to flash it. See:<A href="https://mcuoneclipse.com/2013/06/16/bricking-and-recovering-frdm-kl25z-boards-reset-swd-clock-and-low-power/">Bricking and Recovering FRDM-KL25Z Boards: Reset, SWD Clock and Low Power</A></P><P></P><P>If you want to disable the EzPort and NMI function on PTA0~PTA4, please read "Table 7-3. Flash Option Register Bit Definitions" in <A href="https://www.nxp.com/docs/en/reference-manual/K66P144M180SF5RMV2.pdf">K66P144M180SF5RMV2</A>.</P><P><span class="lia-inline-image-display-wrapper" image-alt="Table 7-3. Flash Option Register Bit Definitions.PNG"><img src="https://community.nxp.com/t5/image/serverpage/image-id/7008i07B488B25087C6F2/image-size/large?v=v2&amp;px=999" role="button" title="Table 7-3. Flash Option Register Bit Definitions.PNG" alt="Table 7-3. Flash Option Register Bit Definitions.PNG" /></span></P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>Best Regards,</P><P>Robin</P><P style="min- padding: 0px;">&nbsp;</P><P>-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Sun, 11 Feb 2018 08:54:55 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/JTAG-Signals-on-K66F/m-p/728361#M44545 Robin_Shen 2018-02-11T08:54:55Z