1 Features
• USB 3.0-Compliant xHCI host controller
– PCIe x1 Gen2 interface
– Four downstream ports
• Two or four downstream ports
• Each downstream port
– May be independently enabled or disabled
– Has adjustments for transmit swing, deemphasis,
and equalization settings
– May be marked as removable or nonremovable
– Has independent power control and overcurrent
detection
• Requires no external flash for default configuration
– Optional serial EEPROM for custom
configuration
• Internal spread spectrum generation
– Low-cost crystal or oscillator support
• Best-in-class adaptive receiver equalizer design

2 Applications
• Rack server, microserver, and tower server
• High performance computing
• Storage area network (SAN) and host bus adapter
(HBA) card
• Desktop PC or motherboard

3 Description
The TUSB7320 supports up to two downstream ports.
The TUSB7340 is a USB 3.0-compliant xHCI host
controller that supports up to four downstream ports.
Both parts are available in a pin-compatible 100-pin
RKM package. For the remainder of this document,
the name TUSB73x0 is used to reference both the
TUSB7320 and the TUSB7340.
The TUSB73x0 interfaces to the host system through
a PCIe x1 Gen 2 interface and provides SuperSpeed,
high-speed, full-speed, or low-speed connections on
the downstream USB ports.