What is the relationship between dTD and dQH in IMX.RT USBOTG?

[TheSix]

What is the relationship between dTD and dQH? How do endpoints receive and send data through dTD and dQH?

[gusarambula · Accepted solution]

Hello TheSix,

I would recommend looking at the USB standard documentation, as these are questions related to the USB Endpoint definitions.

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.

dQH stands for Device Endpoint Queue Head, and describe where the transfers are managed.

Both are closely related but again, the best place to review this relationship is the USB documentation.

Regards,
Gustavo

[TheSix]

Thanks you , Gustavo.