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USB3803 Datasheet(PDF) 55 Page - Microchip Technology |
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USB3803 Datasheet(HTML) 55 Page - Microchip Technology |
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55 / 99 page  2014-2015 Microchip Technology Inc. DS00001691B-page 55 USB3803 7.3.10 ENDPOINT DESCRIPTOR (MULTI-TT) The following table provides endpoint descriptor values for Multi-TT operation. 7.4 Hub Attached as a High-Speed Device (Customer-Configured for Single-TT Support Only) The following tables provide descriptor information for Customer-Configured Single-TT-Only Hubs attached for use with High-Speed devices. 7.4.1 STANDARD DEVICE DESCRIPTOR The following table provides device descriptor values for High-Speed operation. Note: This is only available if Multi-TT is reported in the Other-Speed Configuration Descriptor. TABLE 7-14: ENDPOINT DESCRIPTOR (FOR STATUS CHANGE ENDPOINT, MULTI-TT) Offset Field Size Value Description 0 Length 1 07h Size of this Descriptor. 1 DescriptorType 1 05h Endpoint Descriptor Type. 2 EndpointAddress 1 81h The address of the endpoint on the USB device. 3 Attributes 1 03h Describes the endpoint’s attributes (interrupt only, no synchronization, data endpoint). 4 MaxPacketSize 2 0001h Maximum packet size for this endpoint. 6 Interval 1 0Ch Interval for polling endpoint for data transfers (Maximum Possible). TABLE 7-15: DEVICE DESCRIPTOR Offset Field Size Value Description 0 Length 1 12h Size of this Descriptor. 1 DescriptorType 1 01h Device Descriptor Type. 2 USB 2 0200h USB Specification Release Number. 4 DeviceClass 1 09h Class code assigned by USB-IF for Hubs. 5 DeviceSubClass 1 00h Class code assigned by USB-IF for Hubs. 6 DeviceProtocol 1 01h Protocol Code. 7 MaxPacketSize0 1 40h 64-byte packet size. 8 Vendor 2 user/ default Vendor ID; Customer value defined in ROM or serial port load. 10 Product 2 user/ default Product ID; Customer value defined in ROM or serial port load. 12 Device 2 user/ default Device ID; Customer value defined in ROM or serial port load |
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