SLLU146D May   2011  – June 2025 TUSB7340

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
  7. 2Hardware
    1. 2.1 EVM Board
      1. 2.1.1 TUSB7340 DEMO Boards
    2. 2.2 Hardware Setup
      1. 2.2.1 Power
      2. 2.2.2 VBUS
      3. 2.2.3 PCI Express Slot Options
    3. 2.3 Bringup
    4. 2.4 WAKE Testing Setup
  8. 3Hardware Design Files
    1. 3.1 Schematics
      1. 3.1.1 TUSB7340 DEMO EVM REVC Schematics
    2. 3.2 PCB Layouts
      1. 3.2.1 TUSB7340 PCB Layouts
    3. 3.3 Bill of Materials (BOM)
      1. 3.3.1 TUSB7340 DEMO REVC BOM
  9. 4Additional Information
    1. 4.1 Trademarks
  10. 5Revision History

2.2.1 Power

The EVM boards are populated with three headers: J22, J26, and J40.

J22 header is used to change the state of AUX_DET signal to the TUSB73XX. By default, this header is not shorted and therefore AUX_DET is high. If a jumper shunt is placed over J22, the AUX_DET is low.

The J26 header is used to route 5V from the IDE Power Connector (J5) to the Texas Instruments TPS2560 USB power switch. This header is designed to always have a Jumper Shunt populated. For more information on the Texas Instruments TPS2560, go to www.ti.com.

J40 header is used to select the 3.3V power source for the TUSB7340. By default, a Jumper Shunt is populated across pins 1 and 2 of J40. When in this position, the 3.3V power from the PCI Express slot is routed to the TUSB7340. If the Jumper Shunt is moved to pins 2 and 3, then the 3.3V VAUX power from the PCI Express slot is routed to the TUSB7340. Only move the Jumper Shunt to positions 2 and 3 if wake testing is required. Otherwise, leave the jumper in the default position of 1 and 2.

Note:

The 3.3V VAUX power supply has a limited current capability. According to the PCI Express Electromechanical Spec, the 3.3V VAUX has a maximum current of 375mA. Due to the limited current of 3.3V VAUX, TI recommends to only plug one device into the TUSB73X0. If the Jumper Shunt is left on pins 1 and 2 of J40, this current limitation does not exist and therefore all ports of the TUSB7340 can be used.