For each sampled and held analog input signal Sa, the set of references used to vary voltages for writing is Sa ±1/2 LSB, where LSB is {TAIL ~ the difference} between {HEAD ~ two adjacent states} 
For each sampled and held analog input signal Sa , the set of references used to vary voltages for writing is Sa ±1/2 LSB , where LSB is { TAIL ~ the difference } between { HEAD ~ two adjacent states }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD