The GT3200 provides the Physical Layer (PHY) interface between the USB cable and the peripheral side USB 2.0 Device Controller. The IC is available in two 64-pin packages.
SMSC's proprietary PHY technology results in low power dissipation, enabling high-speed peripherals to operate from power available by way of the USB cable. It supports 480 Mbps transfer rate, while remaining backward compatible with USB 1.1 legacy protocol at 12 Mbps. The GT3200 interfaces to the functional controller via the USB Transceiver Macrocell Interface (UTMI), an interface standard developed for USB 2.0.
In receive mode, the incoming signal is oversampled to recover the clock and data from the serial stream. The data is converted from serial to parallel format, decoded, and then