Hi I2C Experts,
I am looking to use the TCA9800 as a repeater for my I2C communications down a long cable. The power supply downstream is prone to collapse and I want to ensure this design will work as desired
Below is a drawing of the system setup:
During the collapse of the remote 3.3V supply, the MCU will disable the I2C buffer (either by seeing the repeated I2C bus error or by using an ADC to monitor the remote 3.3V supply). Once the collapse of remote 3.3V is detected, the MCU will change the LEDs from LED Driver #2 (via I2C) to indicate a fault. Once the remote 3.3V recovers, the buffer will be re-enabled and the I2C bus should fully recover.
Are there any problems with the design as it is?
Once the TCA9800 is disabled, is it possible to communicate with LED Driver #2 without pull-up resistors?
Thank you,
Reed