USB 2.0 Transceiver Macrocell Interface (UTMI) › It does not evaluate the functionality of the USB companion controllers. The EHCI compliance testing program measures an EHCI controller implementation for conformance to the EHCI specification and evaluates the functionality of the EHCI controller function of a USB 2.0 host controller. These specifications address the need for portable devices to communicate with each other and with USB peripherals when a PC is not available.Įnhanced Host Controller Interface (EHCI) Compliance Testing Program › On-the-go Supplement to the USB 2.0 Specification › USB 2.0 Specification › (download from the USB-IF website): Technical details necessary to understand USB 2.0 requirements and to design USB 2.0-compatible products.
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