USB HOST DRIVER V03 Freescale Semiconductor / Motorola, USB HOST DRIVER V03 Datasheet - Page 34
USB HOST DRIVER V03
Manufacturer Part Number
USB HOST DRIVER V03
Description
USB Host Driver v03
Manufacturer
Freescale Semiconductor / Motorola
Datasheet
1.USB_HOST_DRIVER_V03.pdf
(160 pages)
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inquires of other descriptors for this configuration). For any other descriptor type this
member must be equal to the size of the corresponding
structure (see
lpOutBuffer
description).
lpOutBuffer
Comments:
For all descriptors except the string descriptor no action on the bus occurs. They are
cached after the Device object is created. The request for Device, configuration and string
descriptors can be performed on an unconfigured Device in order to retrieve information
for further configurations and alternate interface setting selection.
To be able to request interface or endpoint descriptors, the Device must be configured
and the current configuration index must be specified in the
member of
ConfigIndex
structure, otherwise the request returns an error. When the
USB_DESC_REQUEST
configuration descriptor and other descriptors for that configuration are acquired in a
single request, the size of the output buffer should be a multiple of the packet size of the
default pipe.
For
structure members refer to the
structure
USB_DESC_REQUEST
USB_DESC_REQUEST
description.
M
3-12
Programming Interface.
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
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