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BQ24090: Will CHG pin always turn low when charger is turned on?

Part Number: BQ24090

Hi

I will use the BQ24090 charger in a design that needs a wake-up signal when the charger is connected to a power source. I would like to know if the CHG pin always indicate charge when the charger is powered up? What happen if the battery is already full charged? Will there be a short pulse on the CHG pin in this case that can be used as wake-up signal? And how long will that pulse be?

I could also use the PG pin but this pin will always be active as long the charger is connected to the power source even if the charge timer times out. In this case we can not turn off our design because of an active wake-up signal.

Best regards

Magnus