The customer had the question about the STAT pin behavior, according to the DS description below:
Status Output. STAT is an open-drain output that signals charging status and fault interrupts. STAT pulls low during charging. STAT is high impedance when charging is complete or the charger is disabled. When a fault occurs, a 256μs pulse is sent out as an interrupt for the host. STAT is enabled/disabled using the EN_STAT bit in the control register. STAT will indicate recharge cycles. Connect STAT to a logic rail using an LED for visual indication or through a 10kΩ resistor to communicate with the host processor.
The customer is interested to know if the 256us fault pulse is active low or active high, but don’t it mentioned in the datasheet.
In my opinion, the fault pulse will base on the current state of STAT pin and provide the opposite fault pulse.
Which means the 256us fault pulse is active high when during charging and the fault pulse is active low when the battery is not charged.
Please kindly correct me, if there is any misunderstanding. Thank you.