TUSB320LAI: UFP in GPIO Mode

K.Yaita

Part Number: TUSB320LAI

Hi Team,

There is "UFP in I2C Mode Schematic" in datasheet however my customer wants to set GPIO Mode.
I would like to know if the following modification from Figure 20 are sufficient or not.
Could you kindly check?
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- ADDR -> NC (floating)
- D1 can be eliminated if the application isn't bus-powered
- SCL/OUT2 and SDA/OUT1 can be left floating if unused
- INT_N/OUT3 can be left floating if unused
- ID pin can be left floating if unused

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Best Regards,
Yaita / Japan disty

over 7 years ago

0 Michael.Walker over 7 years ago

TI__Mastermind 19720 points

Yes, all your modifications to the circuit should be fine

0 K.Yaita over 7 years ago in reply to Michael.Walker

Guru 29720 points

Hi Michael-san,

Thank you for your kind support.

Regarding Figure 20, I believe VDD_5V isn't required because TUSB320LAI supports dead battery mode.
If there is no VDD_5V, I think D1 isn't required too and VDD of TUSB320LAI can be connect VBUS directly.
Is my understanding correct?
I would like to know if there is any concern.

Best Regards,
Yaita

0 Michael.Walker over 7 years ago in reply to K.Yaita

TI__Mastermind 19720 points

If the device does not have a VDD_5V rail then the VDD can be connected directly to VBUS.

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TUSB320LAI: UFP in GPIO Mode