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LP55231: LED Dimming Confusion

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Part Number:LP55231

Hello,

  I am trying to set the pwm values directly(i2c) in the following sequence:

      -write 16h - 0xFF (D1 is linked to red LED)

      - delay x secs

      - write 16h - 0x00 

      - write  17h - 0xFF(D2 is linked to green LED)

But the red (D1) fades out slowly, I want it to switch off immediately and then green to turn on.


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