[kamocat]

Well, let's see. What information can you get from the PSoC, assuming you're using analog module on the cRIO for your analog inputs?
accelerometer?
I don't think the proximity sensor is very useful.

I suppose you could write a program to use the accelerometer as a tilt sensor. Actually, you might be able to have it acquire data from the other accelerometer over I2C, and make a 2D gyro. That would sure be cool.

Other than that, how would it be useful on your robot? (Oh, and you could use it for parallax SONAR, which uses the same pin as DI and DO; something you can't do on the digital sidecar without performance degradation)