Kinetis MicrocontrollersのトピックSWD Debug and Sharing GPIO on a K22 https://community.nxp.com/t5/Kinetis-Microcontrollers/SWD-Debug-and-Sharing-GPIO-on-a-K22/m-p/248593#M6835 <HTML><HEAD></HEAD><BODY><P>Hi Everyone, new to this forum and no doubt will have an array of technical questions after switching from PIC to Kinetis hardware development...</P><P></P><P>Anyway...</P><P></P><P>Going to be using a Kinetis K22 80pin package, and soucring the reference manuals, I will be using SWD for debug/programming.</P><P></P><P>What should I connect my GROUNDDetect Line to? Is it used on SWD?</P><P></P><P>Also, the 3v3... is that a 'sense' for the programmer or a power to my MCU? I will be powering the MCU locally, as there are several other 3V3 devices on the board sharing that net.</P><P></P><P>Thanks!</P><P>Matt</P></BODY></HTML> Fri, 06 Dec 2013 16:50:52 GMT matthewthorne 2013-12-06T16:50:52Z SWD Debug and Sharing GPIO on a K22 https://community.nxp.com/t5/Kinetis-Microcontrollers/SWD-Debug-and-Sharing-GPIO-on-a-K22/m-p/248593#M6835 <HTML><HEAD></HEAD><BODY><P>Hi Everyone, new to this forum and no doubt will have an array of technical questions after switching from PIC to Kinetis hardware development...</P><P></P><P>Anyway...</P><P></P><P>Going to be using a Kinetis K22 80pin package, and soucring the reference manuals, I will be using SWD for debug/programming.</P><P></P><P>What should I connect my GROUNDDetect Line to? Is it used on SWD?</P><P></P><P>Also, the 3v3... is that a 'sense' for the programmer or a power to my MCU? I will be powering the MCU locally, as there are several other 3V3 devices on the board sharing that net.</P><P></P><P>Thanks!</P><P>Matt</P></BODY></HTML> Fri, 06 Dec 2013 16:50:52 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/SWD-Debug-and-Sharing-GPIO-on-a-K22/m-p/248593#M6835 matthewthorne 2013-12-06T16:50:52Z Re: SWD Debug and Sharing GPIO on a K22 https://community.nxp.com/t5/Kinetis-Microcontrollers/SWD-Debug-and-Sharing-GPIO-on-a-K22/m-p/248594#M6836 <HTML><HEAD></HEAD><BODY><P>Hi Matt,</P><P></P><P>Please refer <A href="http://cache.freescale.com/files/32bit/doc/quick_ref_guide/KQRUG.pdf">Kinetis Peripheral Module Quick Reference</A> page35 about K22 SWD debugger interface (Figure 2-8).</P><P>The pin9 PTA4/EZP_CS_b&nbsp; can be left floating (this pin with internal pull-up).</P><P>Wish it helps.</P><P></P><P>B.R.</P><P>Ma Hui</P></BODY></HTML> Mon, 09 Dec 2013 07:40:06 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/SWD-Debug-and-Sharing-GPIO-on-a-K22/m-p/248594#M6836 Hui_Ma 2013-12-09T07:40:06Z