TUSB2046 problem

Zoltan Erdei

Prodigy 50 points

Hi,

I have a problem with TUSB2046. The windows can't see the device, the device seems as unknown device. Error code#43.

Is there any idea, what is the problem with my design?

How can I attach my schematics here?

Thanks,

Zoltan

over 12 years ago

0 Zoltan Erdei over 12 years ago

Prodigy 50 points

I am using 6MHz ceramic resonator instead of quartz crystal. It can cause problem?

0 Zoltan Erdei over 12 years ago in reply to Zoltan Erdei

Prodigy 50 points

Please somebody help me! This problem is an urgent issue!

In my design overcur pins are floating. Not connected, because this is a simple design, power supervising is not neccessary.

May I left overcur pins floating?

0 Elias Villegas M. over 12 years ago in reply to Zoltan Erdei

TI__Guru* 76130 points

Hello Zoltan,

There could be a couple of reasons, you can upload your schematic on the File tab at the top of this page, also, you can email them to elias.villegas@ti.com

The /OVRCUR terminals cannot be unconnected, you have to connect them to 3.3V through a 10K resistors.

Regards.

0 Zoltan Erdei over 12 years ago in reply to Elias Villegas M.

Prodigy 50 points

The original problem solved: TSTMODE was unconnected. I have grounded it, now the TUSB appears as generic USB HUB.

Next problem: I can't see any device through this one.

On downstream ports I have 2-3 devices, but I can't see them from my computer (upstream).

Any advice?

I will upload my schematic soon.

0 Zoltan Erdei over 12 years ago in reply to Zoltan Erdei

Prodigy 50 points

Regarding pullup resistors:

may I connect these overcur pins directly to 3.3V?

I can't connect resistor there, because no way to do that (the board is produced, now I have to figure out some feasible rework).

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TUSB2046 problem