Status of current or last flash erasing.
Options:
1.flashErasing(1) - flash is executing erasing operation
2.flashErasedSuccessful(2) - flash erased successfully
3.flashErasedFail(3) - flash erased failed
4.flashReadOnly(4) - flash state is read only
5.flashOpenFailure(5) - open flash failed
6.bufferAllocationFailure(6) - allocating buffer on flash failed
7.noEraseAfterPowerOn(7) - there is no erasing operation after device was powered on