Factors affecting power consumption in low power consumption mode

The handheld device enters the low-power mode to reduce the operating current and provide the standby time. If some devices are turned on and not disabled, this may cause a waste of energy. Factors that affect power consumption include clock, GPIO, and power supply.

If the clock is caused, you can check the Clock Tree of the system to see which clocks are turned on in low-power mode. Find out the devices that are not switched off and close the module through the suspend function interface, re-open the module when the resume interface wakes up the system.

GPIO can print out the GPIO configuration and check whether the logic is correct. For example, if a GPIO is connected to VCC, if the GPIO is configured with a drop-down, there will be a leakage stream of VCC through the drop-down resistor. Configure the GPIO to disable the drop-down resistor.

If the power supply is caused, you can print the power tree to see if the power supply is not turned off.

For devices, some devices need to send low-power commands, and some devices need to turn off the power. Which method depends on the actual system.