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USB20H04-JD Datasheet(PDF) 30 Page - SMSC Corporation |
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USB20H04-JD Datasheet(HTML) 30 Page - SMSC Corporation |
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30 / 35 page  4-Port USB 2.0 Hub Controller Datasheet Revision 1.63 (03-30-07) Page 30 SMSC USB20H04 DATASHEET OFFSET FULL SPEED HIGH SPEED FIELD NAME DESCRIPTION 4 01h 01h** bNumInterfaces Number of interfaces supported by this configuration 5 01h 01h bConfigurationValue Value to use to select configuration. 6 00h 00h iConfiguration Index of string descriptor describing this configuration (string not supported) 7 user/ signal (Bitmap) user/ signal (Bitmap) bmAttibutes Same as Configuration Descriptor 8 user (mA) user (mA) bMaxPower Same as Configuration Descriptor * Same as Configuration Descriptor ** 02h for multiple-TT Table 9.5 - Standard Interface Descriptor OFFSET FULL SPEED HIGH SPEED FIELD NAME DESCRIPTION 0 09h 09h bLength Size of this descriptor in bytes 1 04h 04h bDescriptorType INTERFACE Descriptor Type 2 00h 00h bInterfaceNumber Number of this interface 3 00h 00h bAlternateSetting Value used to select this alternate setting for the interface 4 01h 01h bNumEndpoints Number of endpoints used by this interface (not including endpoint 0) 5 09h 09h bInterfaceClass Class code assigned by USB for Hubs 6 00h 00h bInterfaceSubClass Subclass code assigned by USB 7 00h 01h* bInterfaceProtcol Protocol code assigned by USB 8 00h 00h bInterface Index of string descriptor describing this configuration (string not supported) * 02h for multiple-TT Table 9.6 - Standard Endpoint Descriptor OFFSET FULL SPEED HIGH SPEED FIELD NAME DESCRIPTION 0 07h 07h bLength Size of this descriptor in bytes 1 05h 05h bDescriptorType ENDPOINT Descriptor Type 2 81h 81h bEndpointAddress The address of the endpoint on the USB device. 3 03h 03h bmAttributes Describes the endpoint's attributes (interrupt only, no synchronization, data endpoint). 4,5 0001h 0001h wMaxPacketSize Maximum packet size for this endpoint 6 FFh 0Ch bInterval Interval for polling endpoint for data transfers. |
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