Strictly necessary cookies are on by default and cannot be turned off. Functional, Performance and Tracking/targeting/sharing cookies can be turned on below based on your preferences (this banner will remain available for you to accept cookies). You may change your cookie settings by deleting cookies from your browser. Then this banner will appear again. You can learn more details about cookies HERE.
Strictly necessary (always on)
Functional, Performance and Tracking/targeting/sharing (default off)
Question: Explain the count value present in EPXFIFOBCH, EPXFIFOBCL registers.
The EPXFIFOBCH, EPXFIFOBCL registers keeps count of the number of bytes in the concerned endpoint received from the peripheral side. So, this register will not reflect bytes sourced by the 8051 CPU or bytes received from the host. The count only reflects the number of bytes in the endpoint as a consequence of that endpoint being under the control of the peripheral domain.