Connection of VBUSPOWER pin in HX2LP

[TeMa_2997106]

Can VBUSPOWER be directly connected to VCC (3.3V)?

I want to build in HX2LP inside the Host PC. Therefore, there is no VBUS on the system.

Thanks,
Tetsuo

[Ajeethkumar_P · Accepted solution]

Hi Tetsuo-san,

Yes. As VIL for HX2LP is 2 to 5.25 volt, you can connect VBUSPOWER to VCC(3.3V) for your embedded hub application. I recommend you to connect VBUSPOWER to 3.3V via a 15K resistor.

Thanks,
Ajeeth

[TeMa_2997106]

Ajeeth-san,

Why does it need resistor?

[Ajeethkumar_P]

Tetsuo-san,

It is a pull-up resistor(to limit the current drawn by the Microcontroller input pin) for the HX2LP input pin.

Thanks,
Ajeeth

[TeMa_2997106]

Ajeeth-san,

Thank you for your comment again. I could understand.

Thanks,

Tetsuo