This anomaly applies to Revision 2, build codes QFAA-Bxx, QCAA-Bxx, CAAA-Bxx.
It was inherited from the previous IC revision
Revision 1.
Symptoms
RAM calibration value is initialized to the wrong value.
Consequences
Statistical margin to data retention failure when retaining RAM in System OFF is lower than intended for high temperature operating conditions.
Note: This failure has not been reported or reproduced under test at the time of publication.
Workaround
Apply the following code after any reset:
*(volatile uint32_t *)0x40000EE4ul |= 0x0000000Ful;
This workaround is implemented in nRF MDK v8.25.0 and later.