https://community.nxp.com/t5/i-MX-RT-Crossover-MCUs/What-is-the-relationship-between-dTD-and-dQH-in-IMX-RT-USBOTG/m-p/1920029#M31368 <P>What is the relationship between dTD and dQH? How do endpoints receive and send data through dTD and dQH?</P> Tue, 30 Jul 2024 05:50:28 GMT TheSix 2024-07-30T05:50:28Z https://community.nxp.com/t5/i-MX-RT-Crossover-MCUs/What-is-the-relationship-between-dTD-and-dQH-in-IMX-RT-USBOTG/m-p/1920029#M31368 <P>What is the relationship between dTD and dQH? How do endpoints receive and send data through dTD and dQH?</P> Tue, 30 Jul 2024 05:50:28 GMT https://community.nxp.com/t5/i-MX-RT-Crossover-MCUs/What-is-the-relationship-between-dTD-and-dQH-in-IMX-RT-USBOTG/m-p/1920029#M31368 TheSix 2024-07-30T05:50:28Z https://community.nxp.com/t5/i-MX-RT-Crossover-MCUs/What-is-the-relationship-between-dTD-and-dQH-in-IMX-RT-USBOTG/m-p/1927772#M31480 <P>Hello TheSix,</P> <P>I would recommend looking at the USB standard documentation, as these are questions related to the USB Endpoint definitions.</P> <P>dTB stands for Device Endpoint Transfer Descriptor, which contains information such as the quantity of data to be transmitted and the location of this data.</P> <P>dQH stands for Device Endpoint Queue Head, and describe where the transfers are managed.</P> <P>Both are closely related but again, the best place to review this relationship is the USB documentation.</P> <P>Regards,<BR />Gustavo</P> Wed, 07 Aug 2024 22:59:35 GMT https://community.nxp.com/t5/i-MX-RT-Crossover-MCUs/What-is-the-relationship-between-dTD-and-dQH-in-IMX-RT-USBOTG/m-p/1927772#M31480 gusarambula 2024-08-07T22:59:35Z https://community.nxp.com/t5/i-MX-RT-Crossover-MCUs/What-is-the-relationship-between-dTD-and-dQH-in-IMX-RT-USBOTG/m-p/1927939#M31485 Thanks you , Gustavo. Thu, 08 Aug 2024 05:47:20 GMT https://community.nxp.com/t5/i-MX-RT-Crossover-MCUs/What-is-the-relationship-between-dTD-and-dQH-in-IMX-RT-USBOTG/m-p/1927939#M31485 TheSix 2024-08-08T05:47:20Z