The AD7147 datasheet page19.Recalibration item. I have question If AD7147 forced into recalibration mode,this main process is how to? My original calibration data which will be affected?
Best Regards, Jacky
The recalibration process does not affect any user stored configuration data. Sometimes the environmental capacitance can change while the user is in proximity, it is necessary to detect this change and update the ambient capacitance value accordingly. The AD7147 does this by recalibrating when the measured CDC value has been above certain threshold relative to the ambient value for a set amount of time. The PROXIMITY_RECAL_LVL bits control what the difference between CDC output and stored ambient value must be to trigger a recalibration. The FP_PROXIMITY_RECAL(full power) and LP_PROXIMITY_RECAL(low power) bits control the timeout period before recalibration.
I hope this answers all of your questions.
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