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0x01.0x02，0x03寄存器是输入信号的 ADC 结果
The device has two operating modes, continuous and triggered, that determine how the ADC operates following these conversions. When the device is in the normal operating mode (that is, MODE bits of the Configuration Register (00h) are set to '111'), it continuously converts an internal shunt voltage reading followed by a bus voltage reading. After the measurement of the internal shunt voltage reading, the current value is calculated. This current value is then used to calculate the power result. These values are subsequently stored in an accumulator, and the measurement/calculation sequence repeats until the number of averages set in the Configuration Register (00h) is reached. Following every sequence, the present set of values, measured and calculated, are appended to previously collected values. After all of the averaging has been completed, the final values for bus voltage, current, and power are updated in the corresponding registers that can then be read. These values remain in the data output registers until they are replaced by the next fully completed conversion results. Reading the data output registers does not affect a conversion in progress.
The mode control in the Configuration Register (00h) also permits selecting modes to convert only the current or the bus voltage in order to further allow the user to configure the monitoring function to fit the specific application requirements.
In triggered mode, writing any of the triggered convert modes into the Configuration Register (00h) (that is, MODE bits of the Configuration Register (00h) are set to ‘001’, ‘010’, or ‘011’) triggers a single-shot conversion. This action produces a single set of measurements; thus, to trigger another single-shot conversion, the Configuration Register (00h) must be written to a second time, even if the mode does not change.
