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UM0290 Datasheet(PDF) 73 Page - STMicroelectronics |
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UM0290 Datasheet(HTML) 73 Page - STMicroelectronics |
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73 / 76 page ![]() UM0290 USB voice demos 73/76 bInterfaceSubClass 0x02 Interface SubClass: AUDIO SUBCLASS AUDIOSTREAMING bInterfaceProtocol 0x00 Interface Protocol: AUDIO PROTOCOL UNDEFINED iInterface 0x00 Unused USB microphone standard AS interface descriptor - audio streaming operational (Interface 1, Alternate Setting 1) bLength 0x09 Size of this descriptor in bytes bDescriptortype 0x24 Descriptor type: AUDIO INTERFACE DESCRIPTOR TYPE bInterfaceNumber 0x01 Interface number: 1 bAlternateSetting 0x01 Alternate setting: 1 bNumEndpoints 0x01 One endpoint. bInterfaceClass 0x01 Interface Class: USB DEVICE CLASS AUDIO bInterfaceSubClass 0x02 Interface SubClass: AUDIO SUBCLASS AUDIOSTREAMING bInterfaceProtocol 0x00 Interface Protocol: AUDIO PROTOCOL UNDEFINED iInterface 0x00 Unused USB microphone class-specific AS general interface descriptor bLength 0x07 Size of this descriptor in bytes bDescriptortype 0x24 Descriptor type: AUDIO INTERFACE DESCRIPTOR TYPE bDescriptorSubtype 0x01 Descriptor Subtype: AUDIO STREAMING GENERAL bTerminalLink 0x02 Format Type: Type I bDelay 0x01 Interface delay: 0x01 wFormatTag 0x0002 AUDIO FORMAT PCM 8 USB microphone audio type I format interface descriptor bLength 0x0B Size of this descriptor in bytes bDescriptortype 0x24 Descriptor type: AUDIO INTERFACE DESCRIPTOR TYPE bDescriptorSubtype 0x03 Descriptor Subtype: AUDIO STREAMING FORMAT TYPE bFormatType 0x01 Format Type: Type I bNrChannels 0x01 Number of Channels: one channel Table 25. Interface descriptors (continued) Field Value Description |
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