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Hi,
I connect wrongly two device side B to side B as you can see at the capture below:
<< ?? >>
the secone device defected the I2C bus when I2C access is initated.
is there anything I can't do the prevent it (beside of course making ReLayout)?
when i insert the second device to Disable the I2C bus is working properly.
can you recomended on some soulation that can be work till we will make relayout (maybe with device to TCA9800)?
Best Regards
Shay Tevet
Hi,
Thanks for the Help,
I hope now you can see the Scheme capture
The Master I2C (2.5V) connected to First TCA9517 (U55) VCCA side.
The VCCB (3.3V) of it connected to the I2C slaves device and to the Second TCA9517 (U62) VCCB side.
If I understand your suggestion correctly, we can change the First TCA9517 (U55) to TCA9509 (removed the PU on side A) and it work properly,
I'm I right?
Best Regards
Shay
Hi,
Thanks for quick respond and best solution.
Regarding the Pull Up resistors on side A of TCA9509, I will removed it also as you mention.
only for the knowledge if I don't remove it is it mean that it will not function well?
Best Reagrds
Shay
Hey Shay,
"if I don't remove it is it mean that it will not function well?"
That is correct, I suspect the device may oscillate if the pull up resistors are there (edit: when trying to pass a low from one side to another).
Thanks,
-Bobby