The SY24656 which has an I2C or SMBUS-compatible interface, is a high accuracy device with the features of current shunt, bus voltage and power monitor. The shunt voltage and the bus supply voltage could be sampled accurately at the same time and will be processed inside the device to generate the power data with programmable calibration, averaging technique and internal multiplier. It makes the application system more reliable because of abundant alert sources settings provided by programmable.