(1) When MCU is reset on the following condition, it starts in the Initial calibration mode.• When either value of the calibration data is empty (0xFFFF). (Except temperature)(2) Calibration starts when receiving the SMBus command 0x58.Calibration is executed only when high byte of data is 0x01.And the content of calibration is selected by low byte of data. ( See table 11. )(3) You can confirm the calibration status by reading SMBus command 0x58.