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LP8864S-Q1: EN is powered off and then powered on, the current setting is initialized

Part Number: LP8864S-Q1

During the process of using the LP8864S-Q1, the customer uses the power-on and power-off of EN to control the Screen off/on function.

In the case of normal configuration, after pulling down EN and then pulling up EN, it is found that the LED_CURR_CONFIG register is initialized, and the set 90mA becomes the original 130mA.

May I ask what is the reason for this phenomenon? Then what kind of control method is reasonable?