USB MassStorage CBI
Universal Serial Bus Mass Storage Class
This specification addresses the Control/Bulk/Interrupt (CBI) architecture, in which the Control, Bulk
In/Out and Interrupt endpoints are used for communication between the host and device. That is, the
Control endpoint is used to transport command blocks to the device via a class-specific request, as well as
to transport standard USB requests. The Bulk In and Bulk Out endpoints are used to transport data between
the host and the
device. The Interrupt endpoint is used to signal command completion.
This specification assumes the host complies with the USB v1.0 and v1.1 specifications. Nothing in this
specification, in its original intent, contradicts the USB v1.0 and v1.1 specifications.