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TUSB3410 датащи(PDF) 79 Page - Texas Instruments |
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TUSB3410 датащи(HTML) 79 Page - Texas Instruments |
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79 / 92 page ![]() 11–9 Table 11–6. USB Descriptors Header (Continued) OFFSET TYPE SIZE VALUE DESCRIPTION 40 bAlternateSetting 1 0x00 Value used to select alternate setting for the interface identified in the prior field 41 bNumEndpoints 1 0x01 Number of endpoints used by this interface (excluding endpoint zero). If this value is zero, this interface only uses the default control pipe. 42 bInterfaceClass 1 0xFF The interface class is vendor specific. 43 bInterfaceSubClass 1 0x00 44 bInterfaceProtocol 1 0x00 45 iInterface 1 0x00 Index of string descriptor describing this interface 46 bLength 1 0x07 Size of this descriptor in bytes 47 bDescriptorType 1 0x05 ENDPOINT descriptor type 48 bEndpointAddress 1 0x01 Bit 3 …0: The endpoint number Bit 7: Direction 0 = OUT endpoint 1 = IN endpoint 49 bmAttributes 1 0x02 Bit 1 …0: Transfer Type 10 = Bulk 11 = Interrupt 50 wMaxPacketSize 2 0x0040 Maximum packet size this endpoint is capable of sending or receiving when this configuration is selected. 52 bInterval 1 0x00 Interval for polling endpoint for data transfers. Expressed in milliseconds. 53 Data Type 1 0x05 USB String descriptor 54 Data Size (low byte) 1 0x1A 26(0x1A) = 4 + 6 + 6 + 10 55 Data Size (high byte) 1 0x00 56 Check Sum 1 0x50 Checksum of data below 57 bLength 1 0x04 Size of string 0 descriptor in bytes 58 bDescriptorType 1 0x03 STRING descriptor type 59 wLANGID[0] 2 0x0409 English 61 bLength 1 0x06 Size of string 1 descriptor in bytes 62 bDescriptorType 1 0x03 STRING descriptor type 63 bString 2 ‘T’,0x00 UNICODE, ‘T’ is the first byte. 65 2 ‘I’,0x00 TI = 0x54, 0x49 67 bLength 1 0x06 Size of string 2 descriptor in bytes 68 bDescriptorType 1 0x03 STRING descriptor type 69 bString 2 ‘u’,0x00 UNICODE, ‘u’ is the first byte. 71 2 ‘C’,0x00 ‘uC’ = 0x75, 0x43 73 bLength 1 0x0A Size of string 3 descriptor in bytes 74 bDescriptorType 1 0x03 STRING descriptor type 75 bString 2 ‘3’,0x00 UNICODE, ‘T’ is the first byte. 77 2 ‘4’,0x00 ‘3410’ = 0x33, 0x34, 0x31, 0x30 79 2 ‘1’,0x00 81 2 ‘0’,0x00 83 Data Type 1 0x00 End of header |
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