USBD ROM Stack  1.0
ROM based USB device stack
Customizing USBD ROM Core Layer

This sections details the steps for advance users who want to change the default behavior of USBD ROM Core Layer by implementing custom overrides. This section assumes that the user understands all concepts defined in Chapter 9 USB Device Framework of USB 2.0 specification (available at Also understands the USB enumeration process and the sequence in which the USB standard request are sent by host to the device.