An endpoint for control transfers specifies the maximum data payload size that the endpoint can accept from
or transmit to the bus. The allowable maximum control transfer data payload sizes for full-speed devices is
8, 16, 32, or 64 bytes; for high-speed devices, it is 64 bytes and for low-speed devices, it is 8 bytes. This
maximum applies to the data payloads of the Data packets following a Setup; i.e., the size specified is for
the data field of the packet as defined in Chapter 8, not including other information that is required by the
protocol. A Setup packet is always eight bytes. A control pipe (including the Default Control Pipe) always
uses its wMaxPacketSize value for data payloads.