LEDDRV — LED drivers

LEDDRV is made of three identical low-side LED drivers on pins LED0, LED1, and LED2. Pin configurations are independent of each other.

The pins can be configured in registers for the following purposes:

• Charge indication
• Charge error indication
• An RGB LED (requires all three pins)
• A general purpose, open-drain output

When a pin is used as a charging indication, the charging state machine controls LEDDRV.

Pins that are used as general purpose LED drivers have a control register containing separate bits for enabling each driver, see registers LEDDRV0SET and LEDDRV0CLR. The host software will set or reset the control register bit, which alters the state of the LED associated with that register bit.

LEDDRV can be used as open-drain digital output. Open Drain mode is the same as the general purpose LED drivers but with the LED removed. An external pull up resistor is required for each LED pin operating in Open Drain mode.

The system can control an RGB LED component (or three separate LEDs) . The LED0, LED1, and LED2 pins can connect to any of the RGB LED cathodes (low-side). The anodes (common or individual) must be connected to the VSYS pin. The R, G, or B value is activated by enabling the associated LED register. Combinations of RG, RB, GB, and RGB are possible.