[86] SAADC: Triggering START task after offset calibration may write a sample to RAM

This anomaly applies to IC Rev. Rev 2, build codes QFAA-Ex0, CIAA-Ex0, QFAB-Ex0.

It was inherited from the previous IC revision Rev 1.


The first sample in the result buffer is incorrect, and will be present although the SAMPLE task has never been issued.


The START task is triggered after performing calibration (through the CALIBRATEOFFSET task).


Incorrect sample data in the result buffer.


Calibration should follow the pattern STOP -> STOPPED -> CALIBRATEOFFSET -> CALIBRATEDONE -> STOP -> STOPPED -> START.