Hardware Setup
www.ti.com
2
Hardware Setup
2.1
Headers
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 will be high. If a jumper shunt is placed over J22, the AUX_DET will
be low.
The J26 header is used to route 5 V from the IDE Power Connector (J5) to the Texas Instruments
TPS2560 USB power switch. This header should always have a Jumper Shunt populated. For more
information on the Texas Instruments TPS2560, please visit
www.ti.com
.
J40 header is used to select the 3.3-V power source for the TUSB73X0. By default, a Jumper Shunt
should be populated across pins 1 and 2 of J40. When in this position, the 3.3-V power from the PCI
Express slot is routed to the TUSB73X0. If the Jumper Shunt is moved to pins 2 and 3, then the 3.3-V
VAUX power from the PCI Express slot is routed to the TUSB73X0. The Jumper Shunt should only be
moved to positions 2 and 3 if wake testing is required. Otherwise the jumper should be left in the default
position of 1 and 2.
NOTE:
The 3.3-V VAUX power supply has a limited current capability. According to the PCI Express
Electromechanical Spec, the 3.3-V VAUX will have a maximum current of 375 mA. Because
of the limited current of 3.3-V VAUX, it is recommended to plug only 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 TUSB73X0 can be used.
2.2
VBUS
VBUS for all of the USB ports comes from the IDE Power Connector (J5).
2.3
PCI Express Slot Options
Because the TUSB73X0 EVM boards are PCI Express X1, they can be used in any PCI Express Slot
(X1, X4, X8, or X16) on a typical motherboard. The boards can be used in either a PCI Express Gen1
(2.5 Gbps) or Gen2 (5 Gbps) slot. Because of the speed of USB3 (5 Gbps), if used in a PCI Express
Gen1 slot, the performance of the TUSB7320 or TUSB7340 will be negatively impacted. For this reason, it
is recommended to always insert the EVM board into a PCI Express Gen2 slot.
8
EVM Board
SLLU146C – May 2011 – Revised May 2014
Submit Documentation Feedback
Copyright © 2011–2014, Texas Instruments Incorporated