Operating Voltage of Jetson TX2

Hi experts,

Can someone tell me how to read the operating voltage? To the best of my understanding, the operational voltage for circuits in modern microprocessors is usually in 0.9-1.2V range. But what we can get from the system file /sys/devices/3160000.i2c/i2c-0/0-0041/iio_device/in_voltage1_input is always 19V, independent of frequency settings. But the voltage should change with the frequency change. Does anyone have any idea of this problem? Thanks in advance!

hello chjing,

please check developer guide, Software-Based Power Consumption Modeling.
Jetson TX2 module has a three-channel INA3221 power monitor at I2C addresses 0x40 and 0x41.
the information from the INA3221 power monitor can be read using sysfs nodes.