10.2 Power Consumption
Power consumption is greatly influenced by several factors, such as operating voltage, the frequency of operation, CPU active period, sleep mode, operating temperature, etc. In practical applications, usually, the microcontroller is put into sleep mode while CPU is idle and not performing any active computations. This minimizes the microcontroller’s active period to a larger extent, thereby the microcontroller average power consumption is reduced.
The table below details the microcontroller power consumption for the snake game demo with the touch surface.
| Serial Number | State | Current |
|---|---|---|
| 1 | Active | 5.8 mA |
| 2 | Low-Power without drift compensation | 13 µA |
| 3 | Low-Power with drift compensation | 31 µA |
The current consumption in Low-Power mode with drift is the average current consumed by the microcontroller during the standby period and the drift measurement period (5s). The microcontroller wakes up from Low-Power mode every five seconds for drift measurement of the sensor nodes.