When CHARGER is enabled and the LEDs are configured, the LEDs indicate the charging status.
The LED[n] pins sink 5 mA of current when active. They are high impedance when disabled. This is suitable for driving LEDs or connecting to host GPIOs in a weak pull-up configuration. The LED anode must be connected to a voltage rail that allows forward bias. If a general purpose open drain output is needed, the LED pins can be used with a pull-up resistor connected to a voltage rail. See LEDDRV — LED drivers for more information.
Charging status
Charging status is available in register BCHGCHARGESTATUS.
LED drivers are configured through TWI to indicate if charging is active or charging is complete.
The charging indication turns off when charging is complete. It turns on when charging starts. The charging indication is off when CHARGER is disabled temporarily due to die temperature exceeding the configured limit.
The charging indication is off when battery temperature is below cold or above hot thresholds. No error is indicated in these cases. The charging indication is off when VBUS > VBUSOVP and no error is indicated.
Error indications
Errors are reported in register BCHGERRREASON and BCHGERRSENSOR.