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bq24725 and I2C interface

Other Parts Discussed in Thread: BQ24725

Dear sir,

We are trying use a common MCU with I2C interface (LPC11xx series) to control bq24725.

But I found the the charger IC did not work well (ACDRV and CMSCR were in wrong level) when we wrote data into the register to set the charging current and charging voltage.

Note: We have checked the data in the registers after writing. The values in the registers were correct. (charging current: 1024mA, voltage: ~12000mV, the others are default)

Is it the timmig or protocol problem? What can I do for such situation?