---
title: IOUSBInterfaceDescriptor
framework: IOKit
role: pseudoSymbol
platforms: []
path: iokit/usb_h_user-space/iousbinterfacedescriptor
---

# IOUSBInterfaceDescriptor

## Declaration

```occ
struct IOUSBInterfaceDescriptor {
   UInt8 bLength;
   UInt8 bDescriptorType;
   UInt8 bInterfaceNumber;
   UInt8 bAlternateSetting;
   UInt8 bNumEndpoints;
   UInt8 bInterfaceClass;
   UInt8 bInterfaceSubClass;
   UInt8 bInterfaceProtocol;
   UInt8 iInterface;
};
```

## Overview

Descriptor for a USB Interface. See the USB Specification at [http://www.usb.org](../../link-1670329.md).

## See Also

### Related Documentation

- [IOUSBInterfaceDescriptor](../../kernel/iousbinterfacedescriptor.md)