BQ27621: I2C Rise Time

Hi,

My customer had a few questions regarding the I2C lines on the BQ27621.

1) It states that the max rise time of the I2C line is 300ns, will a larger rise time lead to potential bit errors?

2) Is turning the clock speed down to 25kHz acceptable for this device? Doing this solved some issues with write fails, but they would like to double check that this would not cause unforseen issues. The DS only specifies 100 and 400 kHz.

2a) Would the I2C block actually perform better with a slower clock speed assuming the rise time wont change by slowing the clock?

Thanks,

Josh