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UM0290 датащи(PDF) 67 Page - STMicroelectronics |
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UM0290 датащи(HTML) 67 Page - STMicroelectronics |
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67 / 76 page ![]() UM0290 USB voice demos 67/76 Table 21. Interface descriptors Field Value Description USB speaker standard interface AC descriptor (Interface 0, Alternate Setting 0) bLength 0x09 Size of this descriptor in bytes bDescriptortype 0x04 Descriptor type: Interface descriptor bInterfaceNumber 0x00 Interface number bAlternateSetting 0x00 Alternate setting number bNumEndpoints 0x00 Number of used endpoints: 0 (only endpoint 0 is used for this interface) bInterfaceClass 0x01 Interface class: USB DEVICE CLASS AUDIO bInterfaceSubClass 0x01 Interface sub class: AUDIO SUBCLASS AUDIOCONTROL bInterfaceProtocol 0x00 Interface protocol: AUDIO PROTOCOL UNDEFINED iInterface 0x00 Index of the interface String descriptor USB speaker class-specific AC interface descriptor bLength 0x09 Size of this descriptor in bytes bDescriptortype 0x24 Descriptor type: AUDIO INTERFACE DESCRIPTOR TYPE bDescriptorSubtype 0x01 Descriptor Subtype: AUDIO CONTROL HEADER bcdADC 0x0100 bcdADC :1.00 wTotalLength 0x0027 Total Length: 39 bInCollection 0x01 Number of streaming interfaces : 1 baInterfaceNr 0x01 baInterfaceNr: 1 USB speaker input terminal descriptor bLength 0x0C Size of this descriptor in bytes: 12 bDescriptortype 0x24 Descriptor type: AUDIO INTERFACE DESCRIPTOR TYPE bDescriptorSubtype 0x02 DescriptorSubtype: AUDIO CONTROL INPUT TERMINAL bTerminalID 0x01 Terminal ID: 1 wTerminalType 0x0101 Terminal Type: AUDIO TERMINAL USB STREAMING bAssocTerminal 0x00 No association bNrChannels 0x01 One channel wChannelConfig 0x0000 Channel Configuration: MONO |
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