3.1 Idle State

In Idle mode, the system monitors the input voltage, battery voltage and temperature, as well as the communications port. If the battery voltage is below 8.4V, the input voltage is greater than 9V and less than 12V, and the battery temperature is greater than 0°C and less than 30°C, then the state machine will switch to Charge state.

1. If the battery voltage is greater than 6.4V, the battery temperature is greater than 0°C and less than 30°C, and a turn-on request is received from the communications port, then the state machine will switch to System-On state.
2. If a charging error condition is detected or the input voltage is outside its operating range, the system will switch to Error state.
3. If a status request is received from the communications port, then the status will be returned.