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Original question:

DS90UB964-Q1: Unused Second I2C Port

DS90UB964-Q1: 2 group of I2C

Amelie Zheng
Genius 10865 points
Part Number: DS90UB964-Q1

Hi Team,

I am just confused why there are two groups of I2C in 964? In what situation customer will use two group?

If I only use one group, just need to left the second group I2C float?

  • 0
    TI__Guru** 103215 points

    Hello Amelie,

    The two I2C ports allow multiple processors or MCUs to communicate with 964 simultaneously. For example, in a system design where two processors receive CSI-2 input from 964 (which has two CSI-2 output ports), each processor can independently communicate with the FPD-Link hub. Using the second I2C port is completely optional. It is recommended to tie both I2C ports up with the datasheet recommended pullups to VDDIO to prevent false toggling - do not leave these pins floating

    Best Regards,

    Casey