Motorola USB08 - page 203

Universal USB Device Driver (USBIO)
Programming Interface
USB08 Evaluation Board Designer Reference Manual
MOTOROLA Universal USB Device Driver (USBIO) 203
Interval
Specifies the interval, in milliseconds, for polling the endpoint for data
as reported in the corresponding endpoint descriptor. The value is
meaningful for interrupt endpoints only. Refer to the Universal Serial
Bus Specification 1.1, Chapter 9 for more information.
InterfaceNumber
Specifies the index of the interface the pipe belongs to. The value
corresponds to the field InterfaceNumber of an
USBIO_INTERFACE_CONFIGURATION_INFO (page 200)
structure.
reserved1
Reserved field set to zero.
reserved2
Reserved field, set to zero.
reserved3
Reserved field, set to zero.
Comments This structure is an output of
IOCTL_USBIO_GET_CONFIGURATION_INFO (page 166) operations.
Only active pipes from the current configuration are returned.