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TUSB1210: Register questions

Aadit Anand
Prodigy 40 points
Part Number: TUSB1210

I am working on a design using the TUSB1210 and I have some questions I couldn't figure out from the spec

- what registers do I need a register write to enable VBUS?

- How should my design report an overcurrent event to the TUSB1210?

Thank you.

  • 0
    TI__Expert 7395 points
    Hello Aadit,

    As you may have already seen on the TUSB1210 datasheet, CPEN is an active-high digital output which function is to control an external 5V supply for VBUS. You must set DRVVBUS and DRVVBUSEXTERNAL bits (OTG_CTRL register, bits 6 & 5) in order to control CPEN

    Additionally, the TUSB1210 doesn't provide a mechanism to sense/report an overcurrent event; so you won't be able to directly connect the FAULT pin from a Vbus switch directly to the TUSB1210. Please note that the ULPI spec mentions that having a pin for an external Vbus indicator is optional. For additional details please refer to section 3.8.7.3 of the ULPI spec Rev.1.1

    Regards,
    Jorge