topic [K20D50M]: Is USB Device D+ High in VLPS Mode? in Kinetis Microcontrollers https://community.nxp.com/t5/Kinetis-Microcontrollers/K20D50M-Is-USB-Device-D-High-in-VLPS-Mode/m-p/503827#M31626 <HTML><HEAD></HEAD><BODY><P>Hi-</P><P></P><P>I have a question regarding D+ status when K20D50 is in VLPS low power mode:</P><P>is it still high when K20 enters stop mode?</P><P></P><P>Thanks!</P><P></P><P></P><P>Hui</P></BODY></HTML> Wed, 20 Jan 2016 06:10:22 GMT huishao2 2016-01-20T06:10:22Z [K20D50M]: Is USB Device D+ High in VLPS Mode? https://community.nxp.com/t5/Kinetis-Microcontrollers/K20D50M-Is-USB-Device-D-High-in-VLPS-Mode/m-p/503827#M31626 <HTML><HEAD></HEAD><BODY><P>Hi-</P><P></P><P>I have a question regarding D+ status when K20D50 is in VLPS low power mode:</P><P>is it still high when K20 enters stop mode?</P><P></P><P>Thanks!</P><P></P><P></P><P>Hui</P></BODY></HTML> Wed, 20 Jan 2016 06:10:22 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/K20D50M-Is-USB-Device-D-High-in-VLPS-Mode/m-p/503827#M31626 huishao2 2016-01-20T06:10:22Z Re: [K20D50M]: Is USB Device D+ High in VLPS Mode? https://community.nxp.com/t5/Kinetis-Microcontrollers/K20D50M-Is-USB-Device-D-High-in-VLPS-Mode/m-p/503828#M31627 <HTML><HEAD></HEAD><BODY><P>Hi Hui,</P><P>According to the reference manual, when the USBOTG module enter the low-power mode, its status will move to the Suspend mode.</P><P>While in the Suspend state, a device must continue to provide power to its D+ ( full/high-speed ) or D- ( low-speed ) pull up resistor to maintain an idle so that the upstream hub can maintain the correct connectivity status for the device.</P><P>Hope it helps.<BR />Have a great day,<BR />Ping</P><P></P><P>-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Thu, 21 Jan 2016 02:50:40 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/K20D50M-Is-USB-Device-D-High-in-VLPS-Mode/m-p/503828#M31627 jeremyzhou 2016-01-21T02:50:40Z