https://community.nxp.com/t5/S12-MagniV-Microcontrollers/USB-Thumb-drive-Pull-up-resistors/m-p/347499#M10547 <HTML><HEAD></HEAD><BODY><P>Hi, when I read the USB Thumb Drive schematic, I found there is no pull-up resistors on D+ or D- (DMH, DMF, DPH, DPF pins). The overview says it is USB2.0 high speed and full speed Compliance (refer to <A _jive_internal="true" href="https://community.nxp.com/external-link.jspa?url=http%3A%2F%2Fwww.freescale.com%2Fwebapp%2Fsps%2Fsite%2Fprod_summary.jsp%3Fcode%3DRDHCS12UF32TD" rel="nofollow" target="_blank">USB Thumb Drive Reference Design|Freescale</A>).</P><P>But if I plug it into computer, will it be recognized as high speed or full speed&nbsp; and how?</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>Thank you in advance.</P><P>Shiwei</P></BODY></HTML> Fri, 08 Aug 2014 23:02:42 GMT shiweiluan 2014-08-08T23:02:42Z https://community.nxp.com/t5/S12-MagniV-Microcontrollers/USB-Thumb-drive-Pull-up-resistors/m-p/347499#M10547 <HTML><HEAD></HEAD><BODY><P>Hi, when I read the USB Thumb Drive schematic, I found there is no pull-up resistors on D+ or D- (DMH, DMF, DPH, DPF pins). The overview says it is USB2.0 high speed and full speed Compliance (refer to <A _jive_internal="true" href="https://community.nxp.com/external-link.jspa?url=http%3A%2F%2Fwww.freescale.com%2Fwebapp%2Fsps%2Fsite%2Fprod_summary.jsp%3Fcode%3DRDHCS12UF32TD" rel="nofollow" target="_blank">USB Thumb Drive Reference Design|Freescale</A>).</P><P>But if I plug it into computer, will it be recognized as high speed or full speed&nbsp; and how?</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>Thank you in advance.</P><P>Shiwei</P></BODY></HTML> Fri, 08 Aug 2014 23:02:42 GMT https://community.nxp.com/t5/S12-MagniV-Microcontrollers/USB-Thumb-drive-Pull-up-resistors/m-p/347499#M10547 shiweiluan 2014-08-08T23:02:42Z https://community.nxp.com/t5/S12-MagniV-Microcontrollers/USB-Thumb-drive-Pull-up-resistors/m-p/347500#M10548 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P></P><P>as far as i know, it depends on the host i.e. a PC in this case.</P><P></P><H1 style="font-size: 32px; color: #000000; font-family: HPSimplified, 'HPSimplified latin', Arial, sans-serif; font-style: normal; text-align: start; text-indent: 0px;"><SPAN style="font-size: 10pt;">Difference Between USB 2.0 Full Speed and USB 2.0 High Speed Devices:</SPAN></H1><P><SPAN style="font-size: 10pt;">- USB 2.0 full speed is transferring data at the same speed as USB 1.1 full speed (12Mbps), but uses protocols that allow for faster devices to be connected to the same hub or system on newer (now older) model computers in the market. <BR /></SPAN><SPAN style="font-size: 10pt;">- USB 2.0 high speed is transferring data at (480Mbps).<BR /></SPAN><BR /><SPAN style="font-size: 10pt;">Regards,</SPAN></P><P><SPAN style="font-size: 10pt;">iggi<BR /><BR /><BR /></SPAN></P></BODY></HTML> Wed, 03 Sep 2014 14:26:04 GMT https://community.nxp.com/t5/S12-MagniV-Microcontrollers/USB-Thumb-drive-Pull-up-resistors/m-p/347500#M10548 iggi 2014-09-03T14:26:04Z