The TUSB1310A device is one port, 5.0-Gbps USB 3.0 physical layer transceiver that operates off of one reference clock, which is provided by either a crystal or an external reference clock. The reference clock frequencies are selectable from 20, 25, 30, and 40 MHz. The TUSB1310A device provides the clock to the USB controller. The use of one reference clock allows the TUSB1310A device to provide a cost-effective USB 3.0 solution with few external components and a low implementation cost.
The USB controller interfaces to the TUSB1310A device through a PIPE (SuperSpeed) and a ULPI (USB 2.0) interface. The 16-bit PIPE operates off of a 250-MHz interface clock. The ULPI supports 8-bit operations with a 60-MHz interface clock.
USB 3.0 reduces active and idle power consumption with improved power-management features. The low-power states of the TUSB1310A device are controlled by the USB controller through the PIPE interface.
SuperSpeed USB uses existing USB software infrastructure by keeping the existing software interfaces and software drivers intact. In addition, SuperSpeed USB retains backward compatibility with USB 2.0 based products by using the same form-factor Type-A connector and cables. Existing USB 2.0 devices work with new USB 3.0 hosts and new USB 3.0 devices with work with legacy USB 2.0 hosts.