TUSB2036: Device Descriptor Request Failed or disconnected (Win 10)

Dong-Hyun Kim

Prodigy 10 points

Part Number: TUSB2036

I want to make a built-in usb hub.

On-chip arduino is connected to ports 1 and 2, and a permanently coupled USBtoTTL device is connected to port 3.

However, when connected to a computer, the connections of all components of ports 1 to 3 are unstable.

In particular, the Device Descriptor Request Failed error appears or is not completely visible.

I am making it after carefully reading all the requirements in the data sheet.

over 3 years ago

0 JMMN over 3 years ago

TI__Guru 60870 points

Can you confirm if the hub loads successfully each time?

If only the downstream devices are having trouble loading consistently, check that enough VBUS is supplied to the downstream ports.

Regards,

JMMN

0 Dong-Hyun Kim over 3 years ago in reply to JMMN

Prodigy 10 points

I'm testing with two pcb samples, one of which loads every time and one doesn't.

I don't have an oscilloscope, so I can't confirm it exactly, but as a result of measuring with a multimeter, VBUS is all 5V (Arduino operating voltage).

0 JMMN over 3 years ago in reply to Dong-Hyun Kim

TI__Guru 60870 points

If one sample is consistently working and the other is not, that indicates an probably assembly issue not a design issue.

Regards,

JMMN

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TUSB2036: Device Descriptor Request Failed or disconnected (Win 10)