| The usbdescriptors_ files contain raw USB descriptors from the Google |
| USB-C to 3.5mm adapter, with different loads connected to the 3.5mm |
| jack. |
| |
| usbdescriptors_nothing.bin: |
| - The descriptors when the jack is disconnected. |
| |
| usbdescriptors_headphones.bin: |
| - The descriptors when the jack is connected to 32-ohm headphones, |
| no microphone. |
| The relevant output terminal is: |
| bDescriptorSubtype 3 (OUTPUT_TERMINAL) |
| bTerminalID 15 |
| wTerminalType 0x0302 Headphones |
| |
| usbdescriptors_lineout.bin: |
| - The descriptors when the jack is connected to a PC line-in jack. |
| The relevant output terminal is: |
| bDescriptorSubtype 3 (OUTPUT_TERMINAL) |
| bTerminalID 15 |
| wTerminalType 0x0603 Line Connector |
| |
| usbdescriptors_headset.bin: |
| - The descriptors when a headset with microphone and low-impedance |
| headphones are connected. |
| The relevant input terminal is: |
| bDescriptorSubtype 2 (INPUT_TERMINAL) |
| bTerminalID 1 |
| wTerminalType 0x0201 Microphone |
| The relevant output terminal is: |
| bDescriptorSubtype 3 (OUTPUT_TERMINAL) |
| bTerminalID 15 |
| wTerminalType 0x0302 Headphones |
| |
| |
