We are reviewing the info and we will reply soon.
Q1. External EEPROM is only optional, the TUSB7320 can work without eeprom, the unused port can be left unconnected, also it can be disabled by software using the PORT2_DIS bit on the USB Control Register at offset E0h.
Q2. If V_AUX is not present in the system, then terminal AUX_DET should be connected to ground.
Q3. You can go to the Board Design Guidelines for reference. (http://www.ti.com/lit/ug/sllu149a/sllu149a.pdf)
Q4. The driver is supported by the Linux community, see the attached document for contact information.
the Linux Community is who support the driver for the xHCI and we have tested with our host with no issues.
The unused super speed terminals must be left floating.
USB 3.0 allow the SS signals to be swapped, so probably it was done for routing purposes on the EVM, customer may or mat not swat the SS signals.
Q1. Correct, /OVERCUR# terminals are 3.3V I/O, table 11.4
Q2. In general for power filtering, yes, it is better to place a 0.1uF along with a 0.01uF.
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