TUSB2077A used as 7-port Hub

Sree C

Other Parts Discussed in Thread: TUSB2077A

Hi,

Attached is my schematic circuit. I just got the board and we don't have any External memory to configure this. We have not yet received main processor board to conenct with. When i powered this board with DC Jacck +5V i am seeing couple of LEDs glowing ( D9 & D1).

I am seeing voltage at the HUB input but not at the down stream port USB conenctors. So when there is no EEPROM how do we configure the HUB to get the down stream ports and i can see 5V on VBUS at down stream port conenctors?

Please let me know how o configure this?

Thanks

Srikanth7457.Schematic Prints.pdf

over 9 years ago

0 Joel Jimenez0 over 9 years ago

TI__Mastermind 18655 points

Hello Srikanth,
The hub seems to be set up correctly. It appears that the TUSB2077A is going into the suspend state since there is no bus activity on all its ports.
Regards,
Joel

0 Sree C over 9 years ago in reply to Joel Jimenez0

Prodigy 180 points

Hi Joel,

Thank You for your clarification. I have one more question on the same.

When can we see an activity on the bus? Do i need to send some data on the upstream port ? Or can i see the voltage on the down stream port if i hook up the upstream port to a PC?

Please clarify.

Thanks

Srikanth

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TUSB2077A used as 7-port Hub