The fuel gauge has different power modes:
- BAT INSERT CHECK: The BAT INSERT CHECK mode is a powered-up, but low-power halted, state where the fuel gauge resides when no battery is inserted into the system.
- NORMAL: In NORMAL mode, the fuel gauge is fully powered and can execute any allowable task.
- SLEEP: In SLEEP mode, the fuel gauge turns off the high-frequency oscillator and operates in a reduced- power state, periodically taking measurements and performing calculations.
- SLEEP+: In SLEEP+ mode, both low-frequency and high-frequency oscillators are active. Although the SLEEP+ mode has higher current consumption than the SLEEP mode, it is also a reduced power mode.
- HIBERNATE: In HIBERNATE mode, the fuel gauge is in a low power state, but can wake up by communication or certain I/O activity.
The relationship between these modes is shown in Figure 8-1 and Figure 8-2.