Real-time clock calibration module, method and real-time clock chip

The invention discloses a real-time clock calibration module, a method and a real-time clock chip. The module is located in a real-time clock and comprises a register which is used for configuring theworking time of a first counter and a second counter; the first counter is used for counting a reference clock outside the BMC chip according to the working time to obtain a first counting value; thesecond counter is used for counting the bus clock in the real-time clock according to the working time to obtain a second counting value; and the timing calibration unit is used for determining an adjustment value according to the first count value and the second count value and correcting a preset value of a second counter in the real-time clock by utilizing the adjustment value. The real-time clock calibration module in the real-time clock can be used for correcting the preset value of the second counter in the real-time clock, clock calibration is automatically achieved in the real-time clock, a processor does not