The CT25100 is a Full-Speed USB controller, which enumerates as Billboard Device. It integrates all necessary infrastructures, including the CT20101, SOF-Calibrated 48MHz USB Clock, which doesn’t need any external component, thus offering a cost-effective solution. CT25100 supports bus-powered mode and enables efficient system power management with suspend and remote wake-up signals.
CT25100 handles requests from the USB host reading the required information from a virtual address space which maps to a combination of ROM and RAM. The ROM contains Billboard specific “boilerplate” data mostly specified in the USB Device Class Definition for Billboard Devices specification; the latter contains product specific data and dynamic information.
