Legend:
*S = SIGN bit
*R = READ bit
*W = WRITE bit
*ST = STOP bit ('1' stops the oscillator)
*CB = CENTURY bit
*CEB = CENTURY ENABLE bit (when CEB is set to '1,' CB will toggle from '0' to '1' or from '1' to '0' at the turn of the century)
*FT = FREQUENCY TEST bit (must be set to '0' upon power for normal operation)
*0 = Must be set to '0'
*ST = STOP bit ('1' stops the oscillator)
*Calibration (The oscillation rate of any crystal changes with temperature. The accuracy is greatly improved by properly setting the calibration bits)
*S = SIGN bit ('1' indicates positive calibration, '0' indicates negative calibration)
*R = READ bit
*W = WRITE bit
== Software ==