The Figure 9-10 shows the
main state machine of the LED driver.
- SHUTDOWN: The device enters into SHUTDOWN after VIN power up.
- INITIAL: The device enters into INITIAL state from SHUTDOWN when EN is
pulled high.
- STANDBY: The device enters into STANDBY state from INITIAL when Chip_EN is
set to 1. The device can also enter into STANDBY from NORMAL when no LED is
effective, or Stop_cmd is received, or from OFAF when LSD_Clear = 1.
- NORMAL: The device enters NORMAL state from STANDBY when one or more LEDs
are effective: for manual mode, at least one LED is enable (PWM and DC
setting is not 0); for autonomous mode, at lease one LED is enable and
Start_cmd is received.