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tusb2046b windows say unknown device

tusb2046b windows say unknown device

This question is not answered
fox1
Posted by fox1
on Mar 30 2012 19:13 PM
Prodigy50 points

Hello,

I created the following circuit. But when I connect the circuit with a Windows 7 system oder Windows XP system, Windows say unknown device. I created the circuit like the self-powered hub, individual port power management in the datasheet Figure 11. What is wrong in the circuit. I ask for help, please.

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  • fox1
    Posted by fox1
    on Mar 31 2012 08:41 AM
    Prodigy50 points

    windows say error code 43

    This device has been stopped because it has reported problems.

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  • fox1
    Posted by fox1
    on Mar 31 2012 11:10 AM
    Prodigy50 points

    now the usb hub is detected, but not the usb device (usb flash)

    I change the RESET (pin 4) from gnd to a RC circuit. 3,3V to 2,2k to 0,1uF and Reset pin. like here

    also I've corrected my mistake. the 3,3V and 1,5k connected to D+ or DP0 and not to the DM0

    also I change the resistors on the connectors by DP0, DM0, DP1 and DM1 to 27R

    now only has to be the usb flash detected. the voltage on the USB flash (VBUS) is only 0,5V. maybe that's a clue. the led on the usb flash lights on short time.

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  • fox1
    Posted by fox1
    on Mar 31 2012 18:01 PM
    Prodigy50 points

    error solved. pull-up resistor on the OVRCUR have missed.

    why TI not write this in the datasheet from the tusb2046b and only in the datasheet from tps2044???

    that is here the big question!?!?!?!


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  • fox1
    Posted by fox1
    on Mar 31 2012 18:27 PM
    Prodigy50 points

    for comparison the figure from the tusb2046b datasheet


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  • ELIAS VILLEGAS
    Posted by ELIAS VILLEGAS
    on Apr 02 2012 09:23 AM
    Mastermind22975 points

    I'm glad you have fixed your problem and thank you for the recommendations.

    Regards.

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