TUSB3410: TUSB3410 , computer display " USB Device Not Recognized "

Robert Hsieh

Prodigy 85 points

Part Number: TUSB3410

hi ,

I use the TUSB3410 to transfer UART & USB console .

The schematic is as following.

When I plug in a USB console device to TUSB3410 , the computer display " USB Device Not Recognized" .

So I measured the voltage level :

VCC#3 : 3.3V

VDD18 : ~0.9V

I think VDD18 voltage level is abnormal . and then I check the value of R1266 and R1262.

R1266 and R1262 resistor value is correct , as the schematic appear.

Why is the VDD18 voltage only 0.9V ? Is the TUSB3410 damaged?

Besides.. I did an experiment to prove whether the TUSB3410 is good or damage.

I remove the R1266 and R1262 and R1269 , and then pull down with VREGEN pin.

at this time, measured VDD18 again. After reworking , the VDD18 voltage level is about 1.78V.

But I still can't get the USB device....

over 5 years ago

0 Gerasimos Madalvanos over 5 years ago

TI__Mastermind 29046 points

Hello Robert,

Do you have the drivers installed for the TUSB3410? The link for the driver is copied below for your convenience. Also do you pulse WAKEUP_N low? You need to either pulse WAKEUP_N low for 3ms, or apply a low to high transition on RI_N/CP pin (pin 16). It doesn't appear you are waking up the device, and this may be the cause of your issue.

http://www.ti.com/lit/zip/SLLC428?jktype=tools_software

Best,
Gerasimos

0 Robert Hsieh over 5 years ago in reply to Gerasimos Madalvanos

Prodigy 85 points

hi ,

I have installed the driver for the TUSB3410 and I don't pulse WAKEUP_N low.

In fact this abnormal issue is one of the five.

The other four devices are working normally. (VDD18 = 1.8V).

0 Robert Hsieh over 5 years ago in reply to Gerasimos Madalvanos

Prodigy 85 points

hi Gerasimos,

I try to pulse WAKEUP_N to low > 3ms. the issue still exists...

0 Gerasimos Madalvanos over 5 years ago in reply to Robert Hsieh

TI__Mastermind 29046 points

Robert,

Just to confirm, you have 4 other TUSB3410's working in an identical setup to the non-functioning TUSB3410? If that is the case, please accept my friend request and we can sort this out.

Best,
Gerasimos

0 Robert Hsieh over 5 years ago in reply to Gerasimos Madalvanos

Prodigy 85 points

hi Gerasioms,

yes, I have 5 TUSB3410 device.

Only 1 device display " USB Device Not Recognized".. the obvious difference is VDD18.

I have accepted the friend request , what is the next step?

0 Gerasimos Madalvanos over 5 years ago in reply to Robert Hsieh

TI__Mastermind 29046 points

Robert,

A few more steps before we can conclude a possible damaged part. Have you tried directly supplying 1.8V to the pin? Also have you made sure it is soldered down correctly? Also is there any obvious external damage to the part?

Best,
Gerasimos

0 Gerasimos Madalvanos over 5 years ago in reply to Gerasimos Madalvanos

TI__Mastermind 29046 points

Hello Robert,

Any update on the issue?

Best,
Gerasimos

0 Robert Hsieh over 5 years ago in reply to Gerasimos Madalvanos

Prodigy 85 points

hi Geasimos,

i didn't find any damage around the circuit of TUSB3410.

This issue is a single case... so next we plan to replace a new TUSB3410.

Interface

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TUSB3410: TUSB3410 , computer display " USB Device Not Recognized "