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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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TUSB3410 bảng dữ liệu(PDF) 78 Page - Texas Instruments |
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TUSB3410 bảng dữ liệu(HTML) 78 Page - Texas Instruments |
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78 / 92 page  11–8 11.6.2 USB Descriptor Header Table 11–6 contains the USB device, configuration, and string descriptors for the bootcode. The last byte is zero to indicate the end of header. Table 11–6. USB Descriptors Header OFFSET TYPE SIZE VALUE DESCRIPTION 0 Signature0 1 0x10 FUNCTION_PID_L 1 Signature1 1 0x34 FUNCTION_PID_H 2 Data Type 1 0x03 USB device descriptor 3 Data Size (low byte) 1 0x12 The device descriptor is 18 bytes. 4 Data Size (high byte) 1 0x00 5 Check Sum 1 0xCC Checksum of data below 6 bLength 1 0x12 Size of device descriptor in bytes 7 bDescriptorType 1 0x01 Device descriptor type 8 bcdUSB 2 0x0110 USB spec 1.1 10 bDeviceClass 1 0xFF Device class is vendor-specific 11 bDeviceSubClass 1 0x00 We have no subclasses. 12 bDeviceProtocol 1 0x00 We use no protocols 13 bMaxPacketSize0 1 0x08 Maximum packet size for endpoint zero 14 idVendor 2 0x0451 USB–assigned vendor ID = TI 16 idProduct 2 0x3410 TI part number = TUSB3410 18 bcdDevice 2 0x0100 Device release number = 1.0 20 iManufacturer 1 0x01 Index of string descriptor describing manufacturer 21 iProducct 1 0x02 Index of string descriptor describing product 22 iSerialNumber 1 0x03 Index of string descriptor describing device’s serial number 23 bNumConfigurations 1 0x01 Number of possible configurations: 24 Data Type 1 0x04 USB configuration descriptor 25 Data Size (low byte) 1 0x19 25 bytes 26 Data Size (high byte) 1 0x00 27 Check Sum 1 0xC6 Checksum of data below 28 bLength 1 0x09 Size of this descriptor in bytes 29 bDescriptorType 1 0x02 CONFIGURATION Descriptor type 30 wTotalLength 2 25(0x19) = 9 + 9 + 7 Total length of data returned for this configuration. Includes the combined length of all descriptors (configuration, interface, endpoint, and class- or vendor-specific) returned for this configuration. 32 bNumInterfaces 1 0x01 Number of interfaces supported by this configuration 33 bConfigurationValue 1 0x01 Value to use as an argument to the SetConfiguration() request to select this configuration 34 iConfiguration 1 0x00 Index of string descriptor describing this configuration. 35 bmAttributes 1 0xE0 Configuration characteristics D7: Reserved (set to one) D6: Self–powered D5: Remote Wakeup is supported D4–0: Reserved (reset to zero) 36 bMaxPower 1 0x64 This device consumes 100 mA. 37 bLength 1 0x09 Size of this descriptor in bytes 38 bDescriptorType 1 0x04 INTERFACE descriptor type 39 bInterfaceNumber 1 0x00 Number of interface. Zero-based value identifying the index in the array of concurrent interfaces supported by this configuration. |
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