TUSB2036: TUSB2036 NOT WORKING

sagar sagare

Prodigy 70 points

Part Number: TUSB2036

TUSB2036 NOT WOKING SCHEMATIC1 _ nrde_comm_v1_FINAL.pdf

over 7 years ago

0 Jorge Llamas (SWAT) over 7 years ago

TI__Expert 7395 points

Hello Sagar,

After a quick look to your schematic, I noticed you are missing the trimming resistor on X2 terminal.
Check "Rd" at figure 5 in section 8.3.2 of the datasheet.

Regards,
Jorge

0 sagar sagare over 7 years ago in reply to Jorge Llamas (SWAT)

Prodigy 70 points

Sir i Rd resistor connected still no working, but i have on doubt that if i connected only one USB downward connected and remaining USB open is it matter

0 sagar sagare over 7 years ago in reply to sagar sagare

Prodigy 70 points

0 Jorge Llamas (SWAT) over 7 years ago in reply to sagar sagare

TI__Expert 7395 points

Hello Sagar,

Can you please provide a scope capture showing XTAL1, Vcc and RESET signals at power-up.

As specified on the datasheet, power-up must meet the following sequence:
"Generally, a reset with a pulse width between 100 μs and 1 ms is recommended after 3.3-V VCC reaches its 90%. Clock signal has to be active during the last 60 μs of the reset window"

Regards,
Jorge

0 Joel Jimenez0 over 7 years ago in reply to Jorge Llamas (SWAT)

TI__Mastermind 18655 points

Hello Sagar,
The TUSB2036 does not have internal pull ups in the OVRCUR terminals. PLease, connect OVRCUR pins to Vcc using 10kOhms resistors.
Regards

0 sagar sagare over 7 years ago in reply to Joel Jimenez0

Prodigy 70 points

Dear Joel Jimenez0:
Today i will do all necessary connection check" once any correction in my schematic" PDF let me know . i will give you update result on Friday

0 sagar sagare over 7 years ago in reply to sagar sagare

Prodigy 70 points

any detail report regarding same above please share

0 sagar sagare over 7 years ago in reply to sagar sagare

Prodigy 70 points

Dear sir

In USB HUB TUSB2036 Datasheet your are not mentioned about upward usb dateline imunity capacitor value so we selected wrong value and due to High ESR value is not working now USB working

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TUSB2036: TUSB2036 NOT WORKING