topic Re: K64F - Divergent information in Kinetis Microcontrollers https://community.nxp.com/t5/Kinetis-Microcontrollers/K64F-Divergent-information/m-p/603155#M35470 <HTML><HEAD></HEAD><BODY><P>Hi CLAUDIO LUIZ KUNDE,</P><P>&nbsp;&nbsp; Thank you for your post.</P><P>&nbsp;&nbsp; Actually, in normal usage, both of the recommendation is ok.</P><P>&nbsp;&nbsp; But if you need to get certification in EMI/EMC tests, we suggest you refer to the datasheet:</P><P><STRONG>Connect VREGIN and VOUT33 together and tie to ground through a 10 kΩ resistor. Do not tie directly to ground, as this causes a latch-up risk.</STRONG></P><P>&nbsp; About the divergent problem, I will report it to the document department.</P><P></P><P>Thank you again!</P><P></P><P><BR />Have a great day,<BR />Kerry</P><P></P><P>-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Wed, 12 Apr 2017 10:15:21 GMT kerryzhou 2017-04-12T10:15:21Z K64F - Divergent information https://community.nxp.com/t5/Kinetis-Microcontrollers/K64F-Divergent-information/m-p/603154#M35469 <HTML><HEAD></HEAD><BODY><P>Hello guys,</P><P></P><P>The datasheet and reference manual has divergent information about USB regulator when you don't want to use it.</P><P></P><P>The datasheet says to tie VREGIN and VOUT33 to GND using a 10K resistor.</P><P></P><P>The reference manual says to remain these pins floating. (see the picture)</P><P></P><P>My board need to get certification in EMI/EMC tests.</P><P></P><P>Which information should I follow?</P><P></P><P>Thank you!</P></BODY></HTML> Tue, 11 Apr 2017 17:09:26 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/K64F-Divergent-information/m-p/603154#M35469 clkunde 2017-04-11T17:09:26Z Re: K64F - Divergent information https://community.nxp.com/t5/Kinetis-Microcontrollers/K64F-Divergent-information/m-p/603155#M35470 <HTML><HEAD></HEAD><BODY><P>Hi CLAUDIO LUIZ KUNDE,</P><P>&nbsp;&nbsp; Thank you for your post.</P><P>&nbsp;&nbsp; Actually, in normal usage, both of the recommendation is ok.</P><P>&nbsp;&nbsp; But if you need to get certification in EMI/EMC tests, we suggest you refer to the datasheet:</P><P><STRONG>Connect VREGIN and VOUT33 together and tie to ground through a 10 kΩ resistor. Do not tie directly to ground, as this causes a latch-up risk.</STRONG></P><P>&nbsp; About the divergent problem, I will report it to the document department.</P><P></P><P>Thank you again!</P><P></P><P><BR />Have a great day,<BR />Kerry</P><P></P><P>-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Wed, 12 Apr 2017 10:15:21 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/K64F-Divergent-information/m-p/603155#M35470 kerryzhou 2017-04-12T10:15:21Z