TUSB4020BI-Q1: The hub shows up on the host, but there are errors

Richard Bardin

Part Number: TUSB4020BI-Q1

This is a new chip for me; the hub shows up on the host, both Windows and Linux, but windows indicated driver issues and Linux says "can't open device"... Anyone encounter this before?

over 2 years ago

0 Richard Bardin over 2 years ago

Prodigy 10 points

In addition the VID is correct, but the PID is showing up as 0x80FF instead of 0x8025 that the datasheet seems to indicate.

0 David (ASIC) Liu over 2 years ago in reply to Richard Bardin

TI__Guru**** 177301 points

Hi,

Can you share your schematic?

Thanks

David

0 Richard Bardin over 2 years ago in reply to David (ASIC) Liu

Prodigy 10 points

pretty much followed the dev board...

0 Richard Bardin over 2 years ago in reply to Richard Bardin

Prodigy 10 points

Supposedly there is a utility for setting the PID, but I have yet to get a copy...

0 David (ASIC) Liu over 2 years ago in reply to Richard Bardin

TI__Guru**** 177301 points

Hi,

Can you please accept my friendship request? I can send you the EEPROM programming tool that you can use to program the EEPROM through the hub.

Thanks

David

+1 David (ASIC) Liu over 2 years ago in reply to David (ASIC) Liu

TI__Guru**** 177301 points

Hi,

Do you have a unprogrammed EEPROM connected to the hub? If this is the case, can you remove the EEPROM and see if the hub can be recognized by the Win or Linux with its default TI VID and PID.

Thanks

David

0 Richard Bardin over 2 years ago in reply to David (ASIC) Liu

Prodigy 10 points

Apparently the pull-ups on the I2C/SMBus were preventing default configuration from loading

0 David (ASIC) Liu over 2 years ago in reply to Richard Bardin

TI__Guru**** 177301 points

Hi,

Awesome, thanks for the update and I am glad you are able to solve this issue.

David

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TUSB4020BI-Q1: The hub shows up on the host, but there are errors