Kinetis Microcontrollers中的主题 Re: Problem connection with ethernet port use 3.3V external power supply https://community.nxp.com/t5/Kinetis-Microcontrollers/Problem-connection-with-ethernet-port-use-3-3V-external-power/m-p/626331#M37569 <HTML><HEAD></HEAD><BODY><P>Hi</P><P></P><P>We prefer to add the voltage at J24 or&nbsp;<SPAN>pin 16 (J3) 5_9V</SPAN> with FRDM-K64F U17 NCP1117ST33T3G regulator, which provides the K64 3.3V voltage.</P><P>While, from the NCP1117ST33T3G regulator datasheet, the VIN voltage should be in range of [4.75V to 10V].</P><P><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_1.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/12819i00E52B1CA8CC9993/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_1.png" alt="pastedImage_1.png" /></span></P><P>Wish it helps.</P><P></P><P>Have a great day,<BR />Ma Hui<BR />-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Sun, 22 Jan 2017 05:51:36 GMT Hui_Ma 2017-01-22T05:51:36Z Problem connection with ethernet port use 3.3V external power supply https://community.nxp.com/t5/Kinetis-Microcontrollers/Problem-connection-with-ethernet-port-use-3-3V-external-power/m-p/626328#M37566 <HTML><HEAD></HEAD><BODY><P>Hi.<BR />I need help with the following problem.<BR />I am using an FRDM-K64F powered with an external 3.3V source.<BR />When connecting ethernet port to pc, sometimes does not connect pc with K64F. After restarting the external source several times connect.<BR />I can not find the reason. Can it be bad configuration of the ethernet port of the K64F? Problem in the transient current of the external source?<BR />Thank you. Greetings.<BR />Juan.</P></BODY></HTML> Thu, 19 Jan 2017 00:19:20 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/Problem-connection-with-ethernet-port-use-3-3V-external-power/m-p/626328#M37566 juanolivero 2017-01-19T00:19:20Z Re: Problem connection with ethernet port use 3.3V external power supply https://community.nxp.com/t5/Kinetis-Microcontrollers/Problem-connection-with-ethernet-port-use-3-3V-external-power/m-p/626329#M37567 <HTML><HEAD></HEAD><BODY><P>Hi</P><P></P><P>If customer using J24 provided power to FRDM-K64F board? Please check the power source driver capability.</P><P><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_1.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/11614iB258A6065F5E024F/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_1.png" alt="pastedImage_1.png" /></span></P><P><BR />Thank you for the attention.</P><P></P><P>Have a great day,<BR />Ma Hui<BR />-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Thu, 19 Jan 2017 05:44:18 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/Problem-connection-with-ethernet-port-use-3-3V-external-power/m-p/626329#M37567 Hui_Ma 2017-01-19T05:44:18Z Re: Problem connection with ethernet port use 3.3V external power supply https://community.nxp.com/t5/Kinetis-Microcontrollers/Problem-connection-with-ethernet-port-use-3-3V-external-power/m-p/626330#M37568 <HTML><HEAD></HEAD><BODY><P>Hola Hui_Ma</P><P></P><P style="color: #666666; font-size: 14px; margin: 0px 0px 1.7rem; padding: 0px;">I designed the hardware around the FRDM-K64F. But this is simple, it consists of a power source of 3.3v @ 100mA. In addition to analog / digital inputs / outputs.&nbsp;<SPAN> I energized the K64F through the pins 4 and 6 of the J3 (P3V3). Is this advisable? Or it is best to do it through the pin 16 (J3) 5_9V or J24 connector?</SPAN></P><P style="color: #666666; font-size: 14px; margin: 0px 0px 1.7rem; padding: 0px;">The problem is after the K64 is running in continuous mode. If there is a power outage when resetting in the short time (10 sec), it does not connect the K64's ethernet port to the network.</P></BODY></HTML> Thu, 19 Jan 2017 14:17:08 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/Problem-connection-with-ethernet-port-use-3-3V-external-power/m-p/626330#M37568 juanolivero 2017-01-19T14:17:08Z Re: Problem connection with ethernet port use 3.3V external power supply https://community.nxp.com/t5/Kinetis-Microcontrollers/Problem-connection-with-ethernet-port-use-3-3V-external-power/m-p/626331#M37569 <HTML><HEAD></HEAD><BODY><P>Hi</P><P></P><P>We prefer to add the voltage at J24 or&nbsp;<SPAN>pin 16 (J3) 5_9V</SPAN> with FRDM-K64F U17 NCP1117ST33T3G regulator, which provides the K64 3.3V voltage.</P><P>While, from the NCP1117ST33T3G regulator datasheet, the VIN voltage should be in range of [4.75V to 10V].</P><P><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_1.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/12819i00E52B1CA8CC9993/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_1.png" alt="pastedImage_1.png" /></span></P><P>Wish it helps.</P><P></P><P>Have a great day,<BR />Ma Hui<BR />-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Sun, 22 Jan 2017 05:51:36 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/Problem-connection-with-ethernet-port-use-3-3V-external-power/m-p/626331#M37569 Hui_Ma 2017-01-22T05:51:36Z