i.MX Processorsのトピックimx35 usb embedded TT limitations? https://community.nxp.com/t5/i-MX-Processors/imx35-usb-embedded-TT-limitations/m-p/211895#M12910 <HTML><HEAD></HEAD><BODY><P>Hi - I posted a question on the imx35 goup a 10 days ago, but it doesn't look like anyone reads that, so would like to re-ask it here:</P><P><A href="http://imxcommunity.org/group/imx35xandimx35pdk/forum/topics/imx35-embedded-tt-limitations">http://imxcommunity.org/group/imx35xandimx35pdk/forum/topics/imx35-embedded-tt-limitations</A></P><P>The question is whether limitations of the embedded TT vs a real usb's TT are documented.&nbsp; Since posting the original question I've confirmed that I can't share iso in and out transfers in the same 1ms frame even if I reduce the number of ehci splits each requires.&nbsp; This means the hardware does not appear to support async usb dacs using its own TT.&nbsp; I'd like to know if this is a silicon limitation, or if there are any tuning parameters which may help resolve.</P><P>Thanks,</P><P>Adrian</P></BODY></HTML> Fri, 17 Feb 2012 10:33:26 GMT Triode 2012-02-17T10:33:26Z imx35 usb embedded TT limitations? https://community.nxp.com/t5/i-MX-Processors/imx35-usb-embedded-TT-limitations/m-p/211895#M12910 <HTML><HEAD></HEAD><BODY><P>Hi - I posted a question on the imx35 goup a 10 days ago, but it doesn't look like anyone reads that, so would like to re-ask it here:</P><P><A href="http://imxcommunity.org/group/imx35xandimx35pdk/forum/topics/imx35-embedded-tt-limitations">http://imxcommunity.org/group/imx35xandimx35pdk/forum/topics/imx35-embedded-tt-limitations</A></P><P>The question is whether limitations of the embedded TT vs a real usb's TT are documented.&nbsp; Since posting the original question I've confirmed that I can't share iso in and out transfers in the same 1ms frame even if I reduce the number of ehci splits each requires.&nbsp; This means the hardware does not appear to support async usb dacs using its own TT.&nbsp; I'd like to know if this is a silicon limitation, or if there are any tuning parameters which may help resolve.</P><P>Thanks,</P><P>Adrian</P></BODY></HTML> Fri, 17 Feb 2012 10:33:26 GMT https://community.nxp.com/t5/i-MX-Processors/imx35-usb-embedded-TT-limitations/m-p/211895#M12910 Triode 2012-02-17T10:33:26Z