DS90UB964-Q1: Unused Second I2C Port

Kenichiro

Part Number: DS90UB964-Q1

[ DS90UB964-Q1 ] Unused Second I2C Port

Hi,

If we don't use second I2C port (I2C_SCL2, I2C_SDA2), how should these pins be?
Does that still require pull-up resistors? or can be left open?

(quote from SNLS500-JULY 2016)

Thanks,
Ken

over 7 years ago

0 Liam Keese over 7 years ago

TI__Genius 12705 points

Hello,
No need to pull up if not using the second I2C port. These are open drain so you can tie directly to GND.

0 Kenichiro over 7 years ago in reply to Liam Keese

Mastermind 9165 points

Thanks, Liam,

The datasheet makes me a bit confusion. It says that these pins are "I/O, LVCMOS, OpenDrain".

Anyway, I will let customer know these pins can be tied to GND, if not used.

Thanks,
Ken

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DS90UB964-Q1: Unused Second I2C Port

[ DS90UB964-Q1 ] Unused Second I2C Port