LPCXpresso IDEのトピックlow-speed USB https://community.nxp.com/t5/LPCXpresso-IDE/low-speed-USB/m-p/597061#M32124 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by hens on Wed Apr 03 13:34:02 MST 2013</STRONG><BR /><SPAN>I moved the 1.5K pullup from usb_d+ to usb_d- in order to select 1.5Mbs, low-speed mode.&nbsp; I also modified USBCLKDIV from 1 to 8, to generate 6MHz clock instead of 48MHz.&nbsp; Low-speed USB device is not recognized.</SPAN><BR /><BR /><SPAN>Is there something else that I need to change?</SPAN><BR /><BR /><SPAN>The reason that I want low-speed is that I suspect I might have a signal fidelity issue on my USB path which is causing the problem reported in my previous thread, "LPC11U24 ISP via USB" (a thread without answers).&nbsp; Aaaargggghhhh!</SPAN></BODY></HTML> Wed, 15 Jun 2016 23:02:44 GMT lpcware 2016-06-15T23:02:44Z low-speed USB https://community.nxp.com/t5/LPCXpresso-IDE/low-speed-USB/m-p/597061#M32124 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by hens on Wed Apr 03 13:34:02 MST 2013</STRONG><BR /><SPAN>I moved the 1.5K pullup from usb_d+ to usb_d- in order to select 1.5Mbs, low-speed mode.&nbsp; I also modified USBCLKDIV from 1 to 8, to generate 6MHz clock instead of 48MHz.&nbsp; Low-speed USB device is not recognized.</SPAN><BR /><BR /><SPAN>Is there something else that I need to change?</SPAN><BR /><BR /><SPAN>The reason that I want low-speed is that I suspect I might have a signal fidelity issue on my USB path which is causing the problem reported in my previous thread, "LPC11U24 ISP via USB" (a thread without answers).&nbsp; Aaaargggghhhh!</SPAN></BODY></HTML> Wed, 15 Jun 2016 23:02:44 GMT https://community.nxp.com/t5/LPCXpresso-IDE/low-speed-USB/m-p/597061#M32124 lpcware 2016-06-15T23:02:44Z Re: low-speed USB https://community.nxp.com/t5/LPCXpresso-IDE/low-speed-USB/m-p/597062#M32125 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by Tsuneo on Wed Apr 03 16:01:55 MST 2013</STRONG><BR /><SPAN>The USB device controller on LPC11Uxx doesn't support low-speed. Just full-speed.</SPAN><BR /><BR /><SPAN>Tsuneo</SPAN></BODY></HTML> Wed, 15 Jun 2016 23:02:45 GMT https://community.nxp.com/t5/LPCXpresso-IDE/low-speed-USB/m-p/597062#M32125 lpcware 2016-06-15T23:02:45Z Re: low-speed USB https://community.nxp.com/t5/LPCXpresso-IDE/low-speed-USB/m-p/597063#M32126 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by hens on Wed Apr 03 16:48:26 MST 2013</STRONG><BR /><SPAN>Thanks Tsuneo.</SPAN><BR /><SPAN>I have reverted back to full-speed settings and will continue debug of the real problem in </SPAN><A href="http://">http://knowledgebase.nxp.com/showthread.php?t=4363</A><SPAN> .</SPAN></BODY></HTML> Wed, 15 Jun 2016 23:02:45 GMT https://community.nxp.com/t5/LPCXpresso-IDE/low-speed-USB/m-p/597063#M32126 lpcware 2016-06-15T23:02:45Z