1# UsbConfigDescriptor 2<!--Kit: Driver Development Kit--> 3<!--Subsystem: Driver--> 4<!--Owner: @lixinsheng2--> 5<!--Designer: @w00373942--> 6<!--Tester: @dong-dongzhen--> 7<!--Adviser: @w_Machine_cc--> 8 9## Overview 10 11Defines standard configuration descriptors, which correspond to **Standard Configuration Descriptor** in the USB protocol. 12 13**Since**: 10 14 15**Related module**: [UsbDDK](capi-usbddk.md) 16 17**Header file:** [usb_ddk_types.h](capi-usb-ddk-types-h.md) 18 19## Summary 20 21### Member Variables 22 23| Name| Description| 24| -- | -- | 25| uint8_t bLength | Size of the descriptor, in bytes.| 26| uint8_t bDescriptorType | Descriptor type.| 27| uint16_t wTotalLength | Total length of the configuration descriptor, including the configuration, interface, endpoint, and class- or vendor-specific descriptors.| 28| uint8_t bNumInterfaces | Number of interfaces supported by the configuration.| 29| uint8_t bConfigurationValue | Configuration index, which is used to select the configuration.| 30| uint8_t iConfiguration | Index of the string descriptor that describes the configuration.| 31| uint8_t bmAttributes | Configuration attributes, including the power mode and remote wakeup.| 32| uint8_t bMaxPower | Maximum power consumption of the bus-powered USB device, in 2 mA.| 33