<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; charset=us-ascii"> <META content="MSHTML 6.00.2800.1400" name=GENERATOR></HEAD> <BODY> <DIV><SPAN class=856450503-09032004><FONT face=Arial color=#0000ff size=2>According to the USB spec., you are not supposed to source any current when Vusb is not present.  You need to gate your connection between the 3.3 V (J3 - 5) and R10 with Vusb.</FONT></SPAN></DIV> <DIV><SPAN class=856450503-09032004><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </DIV> <DIV><SPAN class=856450503-09032004><FONT face=Arial color=#0000ff size=2>Marc Reinig</FONT></SPAN></DIV> <DIV><SPAN class=856450503-09032004><FONT face=Arial color=#0000ff size=2>System Solutions</FONT></SPAN></DIV> <DIV><SPAN class=856450503-09032004><FONT face=Arial color=#0000ff size=2></FONT></SPAN> </DIV> <BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid"> <DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma size=2>-----Original Message-----<BR><B>From:</B> usb-bounces@opencores.org [mailto:usb-bounces@opencores.org]<B>On Behalf Of </B>Mohammad AK<BR><B>Sent:</B> Monday, March 08, 2004 10:34 AM<BR><B>To:</B> usb@opencores.org<BR><B>Subject:</B> [usb] USB1.1 transceiver<BR><BR></FONT></DIV> <DIV>hi everybody</DIV> <DIV>I would appreciate, any comments on the attached schematic. </DIV> <DIV>thanks </DIV> <DIV>AbuKhater</DIV> <P> <HR SIZE=1> Do you Yahoo!?<BR>Yahoo! Search - <A href="http://search.yahoo.com/?fr=ad-mailsig-home">Find what youre looking for faster.</A></BLOCKQUOTE></BODY></HTML>