topic Re: USB CDC K60 virtual com problem in Kinetis Microcontrollers https://community.nxp.com/t5/Kinetis-Microcontrollers/USB-CDC-K60-virtual-com-problem/m-p/423495#M24322 <HTML><HEAD></HEAD><BODY><P>Thank Hao.</P><P></P><P>Im put the capacitor and work fine!!</P><P></P><P>Regards</P></BODY></HTML> Wed, 24 Jun 2015 02:45:24 GMT josei 2015-06-24T02:45:24Z USB CDC K60 virtual com problem https://community.nxp.com/t5/Kinetis-Microcontrollers/USB-CDC-K60-virtual-com-problem/m-p/423493#M24320 <HTML><HEAD></HEAD><BODY><P>I´m using USB CDC Vritural Com Example (MQX 4.1)&nbsp; on a own desing borad K60. The usb enumerate correctly on a desktop PC, send and recibe data. But when I&nbsp; connect a notebook the device not enumarate. </P><P></P><P>The usb schematics is: </P><P></P><P><span class="lia-inline-image-display-wrapper" image-alt="usbK60-EGSE-CU.PNG"><img src="https://community.nxp.com/t5/image/serverpage/image-id/56068i70A1EF9F7DD91ABE/image-size/large?v=v2&amp;px=999" role="button" title="usbK60-EGSE-CU.PNG" alt="usbK60-EGSE-CU.PNG" /></span></P><P></P><P>The K60 ucontroller is powered by an external regulator</P><P></P><P style="font-family: arial, helvetica, 'helvetica neue', verdana, sans-serif; color: #51626f;">My software configuration is like:</P><P></P><P style="font-family: arial, helvetica, 'helvetica neue', verdana, sans-serif; color: #51626f;">SO: W7 64bit</P><P style="font-family: arial, helvetica, 'helvetica neue', verdana, sans-serif; color: #51626f;">RTOS: MQX 4.1.1</P><P style="font-family: arial, helvetica, 'helvetica neue', verdana, sans-serif; color: #51626f;">HW:MK60DN512ZVLQ10 - 144LQFP</P><P style="font-family: arial, helvetica, 'helvetica neue', verdana, sans-serif; color: #51626f;">Tool: CW10.6</P><P style="font-family: arial, helvetica, 'helvetica neue', verdana, sans-serif; color: #51626f;"></P><P>To discard problems in the notebook drivers made a test with a frdmk64 and is listed correctly.</P><P></P><P>Someone can help me with this problem?</P></BODY></HTML> Tue, 23 Jun 2015 14:57:11 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/USB-CDC-K60-virtual-com-problem/m-p/423493#M24320 josei 2015-06-23T14:57:11Z Re: USB CDC K60 virtual com problem https://community.nxp.com/t5/Kinetis-Microcontrollers/USB-CDC-K60-virtual-com-problem/m-p/423494#M24321 <HTML><HEAD></HEAD><BODY><P>Hi Jose,</P><P></P><P>There is a major problem with your schematic. VOUT33 should be connected with 2.2uF. Otherwise there will not be stable 3.3V output on it. The internal USB transceiver relies on having 3.3V output on VOUT33 to operate correctly. Please try to add the cap.</P><P></P><P>Hao</P></BODY></HTML> Wed, 24 Jun 2015 02:32:13 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/USB-CDC-K60-virtual-com-problem/m-p/423494#M24321 cutworth 2015-06-24T02:32:13Z Re: USB CDC K60 virtual com problem https://community.nxp.com/t5/Kinetis-Microcontrollers/USB-CDC-K60-virtual-com-problem/m-p/423495#M24322 <HTML><HEAD></HEAD><BODY><P>Thank Hao.</P><P></P><P>Im put the capacitor and work fine!!</P><P></P><P>Regards</P></BODY></HTML> Wed, 24 Jun 2015 02:45:24 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/USB-CDC-K60-virtual-com-problem/m-p/423495#M24322 josei 2015-06-24T02:45:24Z