Cypress Perform

Home > Support & Community
support.cypress.com     Bookmark and Share
Support & Community

Knowledge Base Article



Binding Composite Devices to CyUSB.sys - KBA84118

Last Updated: 04/15/2013
Version: **
Question: Can CyUSB.sys handle composite devices?

Answer: No. CyUSB.sys is a generic USB device driver that assumes a device has only one interface. However, composite devices are bound to windows composite driver (usbccgp.sys) by default. This exposes each interface as if it were a separate USB device. Each of these interfaces can be bound to CyUSB.sys (one instance of CyUSB.sys per interface). The composite device part of the overhead is handled by usbccgp.sys.

Related Categories: USB Controllers
Sunset Owner: KXP; Secondary Owner: MSMS; Sunset Date: 09/05/13
Spec No: 001-84118; Sunset Owner: KXP; Secondary Owner: MSMS; Sunset Date: 09/05/13