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TCA9544A: I2C clock low time spec issue

Shu-Cheng LIN
Guru 11785 points
Part Number: TCA9544A

Hi Sirs,

Sorry to bother you.

We have test issue for tscl of TCA9544APWR.

Our measurement is 1.22us, it's lower than data spec 1.3us.

We would like to know this value is control by 9544? or PCH?

Could you share experience for us how to fix it?

Thanks!!

 

  • 0
    TI__Guru 72181 points

    Hello Shu-Cheng,

    Tlow and T high refer to the clock which is controlled by the master not the slave. TCA9544A should not affect the Tlow time.

    The fix should be done through software.

    Thanks,

    -Bobby