LPC Microcontrollers中的主题 Re: LPC540: SWD and JTAG https://community.nxp.com/t5/LPC-Microcontrollers/LPC540-SWD-and-JTAG/m-p/1036741#M40366 <HTML><HEAD></HEAD><BODY><P>Hey Jun,</P><P>Thank you. I read that article before. Very useful. Just wanted to make sure I am not making a mistake. I can only find information regarding pull-up/pull-down resistors for SWD in the LPC54x datasheet, not JTAG.</P><P>Thanks,</P><P>Jana</P></BODY></HTML> Wed, 18 Mar 2020 15:01:21 GMT jana_beck 2020-03-18T15:01:21Z LPC540: SWD and JTAG https://community.nxp.com/t5/LPC-Microcontrollers/LPC540-SWD-and-JTAG/m-p/1036739#M40364 <HTML><HEAD></HEAD><BODY><P>Hi!<BR />I am currently on a project where we want to program via SWD, but also have the possibility to use JTAG for boundary scan if needed later on.</P><P>Some pins are used twice (eg. SWD: SWDIO, JTAG: TMS) and connect to different pins of the MCU (LPC540J16JBD100E).</P><P></P><P>- is this a problem, when I am using SWD, but also have a signal on JTAG pins (eg. PIO0_4 (TMS))</P><P>- do I need external resistors? For SWD I do not, but there is no information regarding JTAG in the datasheet.</P><P></P><P>Thanks!</P></BODY></HTML> Mon, 16 Mar 2020 18:08:06 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPC540-SWD-and-JTAG/m-p/1036739#M40364 jana_beck 2020-03-16T18:08:06Z Re: LPC540: SWD and JTAG https://community.nxp.com/t5/LPC-Microcontrollers/LPC540-SWD-and-JTAG/m-p/1036740#M40365 <HTML><HEAD></HEAD><BODY><P>Hi Jana,</P><P>Please refer this article for SWD and JTAG design.</P><P><A href="https://community.nxp.com/thread/388998">https://community.nxp.com/thread/388998</A>&nbsp;</P><P></P><P>Have a nice day,</P><P>Jun Zhang</P></BODY></HTML> Wed, 18 Mar 2020 08:31:49 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPC540-SWD-and-JTAG/m-p/1036740#M40365 ZhangJennie 2020-03-18T08:31:49Z Re: LPC540: SWD and JTAG https://community.nxp.com/t5/LPC-Microcontrollers/LPC540-SWD-and-JTAG/m-p/1036741#M40366 <HTML><HEAD></HEAD><BODY><P>Hey Jun,</P><P>Thank you. I read that article before. Very useful. Just wanted to make sure I am not making a mistake. I can only find information regarding pull-up/pull-down resistors for SWD in the LPC54x datasheet, not JTAG.</P><P>Thanks,</P><P>Jana</P></BODY></HTML> Wed, 18 Mar 2020 15:01:21 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPC540-SWD-and-JTAG/m-p/1036741#M40366 jana_beck 2020-03-18T15:01:21Z Re: LPC540: SWD and JTAG https://community.nxp.com/t5/LPC-Microcontrollers/LPC540-SWD-and-JTAG/m-p/1036742#M40367 <HTML><HEAD></HEAD><BODY><P>Good to know. Just refer that article. We already have customer refer it without issue.</P></BODY></HTML> Thu, 19 Mar 2020 07:18:34 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPC540-SWD-and-JTAG/m-p/1036742#M40367 ZhangJennie 2020-03-19T07:18:34Z