The device a command code that is unsupported via I2C
Possible Causes:
- Attempted to write an unsupported register using I2C
Scope Debug
- Trigger a scope on the falling edge of ALERTB while probing SCL/SDA
- Go Offline and then back Online in LTpowerPlay (forces a refresh of GUI cache values)
- Click Write All in LTpowerPlay
- Observe the command that was written to the device immediately preceding the falling ALERTB signal.