---
title: Additional Specifications
framework: kernel
role: collectionGroup
role_heading: API Collection
path: kernel/hardware_families/usb/additional_specifications
---

# Additional Specifications

Structures related to hubs, devices, and endpoints.

## Topics

### Device Requests

- [IOUSBDevReqOOL](kernel/iousbdevreqool.md)
- [IOUSBDevReqOOLTO](kernel/iousbdevreqoolto.md)
- [IOUSBDevRequest](kernel/iousbdevrequest.md)
- [IOUSBDevRequestTO](kernel/iousbdevrequestto.md)
- [IOUSBDeviceRequest](kernel/iousbdevicerequest.md)
- [IOUSBDeviceRequestPtr](kernel/iousbdevicerequestptr.md)
- [IOUSBDeviceRequestSetSELData](kernel/iousbdevicerequestsetseldata.md)

### Hub Port Status Requests

- [IOUSB30HubPortStatusExt](kernel/iousb30hubportstatusext.md)
- [IOUSBHubPortStatus](kernel/iousbhubportstatus.md)
- [IOUSBHubStatusPtr](kernel/iousbhubstatusptr.md)
- [IOUSBHubStatus](kernel/iousbhubstatus.md)

### Communication Requests

- [IOUSBFindInterfaceRequest](kernel/iousbfindinterfacerequest.md)
- [IOUSBBulkPipeReq](kernel/iousbbulkpipereq.md)
- [IOUSBFindEndpointRequest](kernel/iousbfindendpointrequest.md)

### USB Types

- [tIOUSB20BusCurrent](kernel/tiousb20buscurrent.md)
- [tIOUSB30BusCurrent](kernel/tiousb30buscurrent.md)
- [tIOUSB30DeviceNotificationType](kernel/tiousb30devicenotificationtype.md)
- [tIOUSB30HubExtStatus](kernel/tiousb30hubextstatus.md)
- [tIOUSB30HubPortStatusCode](kernel/tiousb30hubportstatuscode.md)
- [tIOUSB30LinkStateTimeout](kernel/tiousb30linkstatetimeout.md)
- [tIOUSB30ResetTimeout](kernel/tiousb30resettimeout.md)
- [tIOUSB30TimingParameters](kernel/tiousb30timingparameters.md)
- [tIOUSBBusVoltage](kernel/tiousbbusvoltage.md)
- [tIOUSBDeviceCapabilityType](kernel/tiousbdevicecapabilitytype.md)
- [tIOUSBDeviceRequest](kernel/tiousbdevicerequest.md)
- [tIOUSBDeviceRequestDirectionValue](kernel/tiousbdevicerequestdirectionvalue.md)
- [tIOUSBDeviceRequestRecipientValue](kernel/tiousbdevicerequestrecipientvalue.md)
- [tIOUSBDeviceRequestTypeValue](kernel/tiousbdevicerequesttypevalue.md)
- [tIOUSBEndpointDirection](kernel/tiousbendpointdirection.md)
- [tIOUSBEndpointSynchronizationType](kernel/tiousbendpointsynchronizationtype.md)
- [tIOUSBEndpointType](kernel/tiousbendpointtype.md)
- [tIOUSBEndpointUsageType](kernel/tiousbendpointusagetype.md)
- [tIOUSBHostConnectionSpeed](kernel/tiousbhostconnectionspeed.md)
- [tIOUSBHostPortStatus](kernel/tiousbhostportstatus.md)
- [tIOUSBHostPortType](kernel/tiousbhostporttype.md)
- [tIOUSBLanguageID](kernel/tiousblanguageid.md)
- [tInternalUSBHostConnectionSpeed](kernel/tinternalusbhostconnectionspeed.md)
- [tUSBHostConnectionSpeed](kernel/tusbhostconnectionspeed.md)
- [tUSBHostDeviceAddress](kernel/tusbhostdeviceaddress.md)
- [tUSBHostPortStatus](kernel/tusbhostportstatus.md)
- [tUSBHostPortType](kernel/tusbhostporttype.md)
- [IOUSBGetFrameStruct](kernel/iousbgetframestruct.md)
- [IOUSBHostIOSourceClientRecord](kernel/iousbhostiosourceclientrecord.md)
- [IOUSBIsocFrame](kernel/iousbisocframe.md)
- [IOUSBIsocStruct](kernel/iousbisocstruct.md)
- [IOUSBLowLatencyIsocFrame](kernel/iousblowlatencyisocframe.md)
- [IOUSBLowLatencyIsocStruct](kernel/iousblowlatencyisocstruct.md)
- [IOUSBKeyboardData](kernel/iousbkeyboarddata.md)
- [IOUSBKeyboardDataPtr](kernel/iousbkeyboarddataptr.md)
- [IOUSBMouseData](kernel/iousbmousedata.md)
- [IOUSBMouseDataPtr](kernel/iousbmousedataptr.md)
- [IOUSBMatch](kernel/iousbmatch.md)
- [USBClassSpecificDesc](kernel/usbclassspecificdesc.md)
- [USBDeviceAddress](kernel/usbdeviceaddress.md)
- [USBDeviceInformationBits](kernel/usbdeviceinformationbits.md)
- [USBHubClassRequest](kernel/usbhubclassrequest.md)
- [USBLowLatencyBufferType](kernel/usblowlatencybuffertype.md)
- [USBNotificationTypes](kernel/usbnotificationtypes.md)
- [USBPhysicalAddress32](kernel/usbphysicaladdress32.md)
- [USBPowerRequestTypes](kernel/usbpowerrequesttypes.md)
- [USBReEnumerateOptions](kernel/usbreenumerateoptions.md)
- [USBStatus](kernel/usbstatus.md)
- [USBStatusPtr](kernel/usbstatusptr.md)

## See Also

### USB Specifications

- [IOUSBIsochronousFrame](kernel/iousbisochronousframe.md)
- [USB Device Descriptors](kernel/hardware_families/usb/usb_device_descriptors.md)