topic Re: LPC4367 USB Data Pulldowns in LPC Microcontrollers https://community.nxp.com/t5/LPC-Microcontrollers/LPC4367-USB-Data-Pulldowns/m-p/762661#M30706 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>LPC4367 both USB modules provide internal 15Kohm pull-down resistor to USBx_DP and USBx_DM pins.</P><P>There doesn't need to use external 15Kohm pull down resistor for USB host function.</P><P>Wish it helps.</P><P><BR />Have a great day,<BR />Mike</P><P></P><P>-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Tue, 12 Jun 2018 07:57:59 GMT Hui_Ma 2018-06-12T07:57:59Z LPC4367 USB Data Pulldowns https://community.nxp.com/t5/LPC-Microcontrollers/LPC4367-USB-Data-Pulldowns/m-p/762660#M30705 <HTML><HEAD></HEAD><BODY><P>Are 15kOhm nominal pulldown resistors required on the USB0 DP and DM lines&nbsp;of an LPC4367JET256, or&nbsp;are&nbsp;they included on-die? The reference manual specifically mentions that series termination resistors should not be included, but makes no mention of the pulldowns required by the USB spec.</P><P></P><P>The <A href="http://www.keil.com/mcb4300/mcb4300v1-3-schematics.pdf">Kiel MCB4300</A>&nbsp;eval kit does <STRONG>not</STRONG> include them, but the <A href="https://www.element14.com/community/servlet/JiveServlet/download/62631-1-106454/LPC4357-EVB_SCH.pdf">LPC4357-EVB</A> eval kit available at element14 <STRONG>does</STRONG> (as well as 47pF capacitors on the data lines).</P></BODY></HTML> Thu, 07 Jun 2018 21:55:51 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPC4367-USB-Data-Pulldowns/m-p/762660#M30705 maxschweiner-et 2018-06-07T21:55:51Z Re: LPC4367 USB Data Pulldowns https://community.nxp.com/t5/LPC-Microcontrollers/LPC4367-USB-Data-Pulldowns/m-p/762661#M30706 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>LPC4367 both USB modules provide internal 15Kohm pull-down resistor to USBx_DP and USBx_DM pins.</P><P>There doesn't need to use external 15Kohm pull down resistor for USB host function.</P><P>Wish it helps.</P><P><BR />Have a great day,<BR />Mike</P><P></P><P>-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Tue, 12 Jun 2018 07:57:59 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPC4367-USB-Data-Pulldowns/m-p/762661#M30706 Hui_Ma 2018-06-12T07:57:59Z