I'm working on a project with 18F452 and a number of (16) I2C I/O Expanders (PCF8574).
This would give additional 128 I/O Ports.
The PCF8574's will be on separate PCBs each.
I'm planning to use a ribbon cable to connect all the Boards to the I2C bus.
Do you have any experience regarding the max cable length for I2C communication?
regards
Ralph
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