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There are two I2Cs form FPGA of MB for redundant. The I/O ports of these two I2C expander are all connected together as below. Has any concern for below topology? Thank you.
This is generally OK, but you should be careful not to have more than one output active at any given time on a single net. If there are two or more outputs connected together driving opposite states, large currents will result. For this reason, it is best if the I/Os of the secondary expander are all configured as inputs until it is needed (e.g., in the event of the primary expander failing somehow).
