topic Re: USB Vregin input - MK64 in Kinetis Microcontrollers https://community.nxp.com/t5/Kinetis-Microcontrollers/USB-Vregin-input-MK64/m-p/638972#M38609 <HTML><HEAD></HEAD><BODY><P>Ok.</P><P>Thank you very much!</P><P>I've posted another question regarding un used I/O's and output state at reset.</P><P>Can you amswer that also?</P></BODY></HTML> Tue, 24 Jan 2017 12:17:25 GMT roymessinger 2017-01-24T12:17:25Z USB Vregin input - MK64 https://community.nxp.com/t5/Kinetis-Microcontrollers/USB-Vregin-input-MK64/m-p/638970#M38607 <HTML><HEAD></HEAD><BODY><P>I'm designing a board based on the MK64 (the FRDM K64 is my reference design). I do not use the USB features of the MK64. I am using the UART capabilities (using USB dongle to RS485 cable from a far host PC to my controller board, then to UART inputs on the MK64 via a MAX3362 RS 485 Transceiver).</P><P>In such case, do I need to connect a voltage to that pin?</P><P>Leave it float?</P><P>Thanks!</P></BODY></HTML> Mon, 23 Jan 2017 16:33:46 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/USB-Vregin-input-MK64/m-p/638970#M38607 roymessinger 2017-01-23T16:33:46Z Re: USB Vregin input - MK64 https://community.nxp.com/t5/Kinetis-Microcontrollers/USB-Vregin-input-MK64/m-p/638971#M38608 <HTML><HEAD></HEAD><BODY><P>Hi Roy,</P><P>Connect VREGIN and VOUT33 together and tie to ground through a 10kΩ resistor.</P><P><span class="lia-inline-image-display-wrapper" image-alt="Unused analog interfaces.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/12541iE9CC3B95CCBE05E2/image-size/large?v=v2&amp;px=999" role="button" title="Unused analog interfaces.png" alt="Unused analog interfaces.png" /></span></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> Tue, 24 Jan 2017 01:55:29 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/USB-Vregin-input-MK64/m-p/638971#M38608 Robin_Shen 2017-01-24T01:55:29Z Re: USB Vregin input - MK64 https://community.nxp.com/t5/Kinetis-Microcontrollers/USB-Vregin-input-MK64/m-p/638972#M38609 <HTML><HEAD></HEAD><BODY><P>Ok.</P><P>Thank you very much!</P><P>I've posted another question regarding un used I/O's and output state at reset.</P><P>Can you amswer that also?</P></BODY></HTML> Tue, 24 Jan 2017 12:17:25 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/USB-Vregin-input-MK64/m-p/638972#M38609 roymessinger 2017-01-24T12:17:25Z