USS-312

Advance www.DataSheet4U.com Data Sheet, Rev. 5 March 2000 USS-312 Two-Port PCI-to-USB OpenHCI Host Controller Features s Description Lucent Technologies Microelectronics Group’s USS312 provides a single-chip PCI-to-Universal Serial Bus (USB) solution. The USS-312 interfaces directly to any 32-bit 33 MHz PCI bus and is ideal for either onboard applications or add-in card applications. It can easily be configured to communicate in either a 3 V PCI environment or 5 V PCI environment simply by selecting the appropriate communications voltage level on the VIO input pin. The USS-312 provides two downstream USB ports for connectivity with any USB compliant device or hub. Full-speed or low-speed peripherals are supported along with all of the USB transfer types: control, interrupt, bulk, or isochronous. The USS312’s OpenHCI compliance offers significant USB performance benefits and reduced CPU overhead compared to other host controllers. The USS-312 is fully compatible with the Microsoft Windows Standard OpenHCD Drivers. The USS-312 is a 3.3 V device fabricated in 0.35 µm technology. Integrated dual-speed USB transceivers enable a single-chip PCI-to-USB solution. The USS-312 supports the legacy peripherals feature, as defined in the OpenHCI Specification Release 1.0a. An advanced power management capabilities interface compliant with PCI Bus Power Management Interface Specification Revision 1.1 is present to offer a variety of power-savings modes to the host system. 32-bit, 33 MH...