The Data and Clock inputs may be shared with other inputs on the IIC–Bus
Data and Clock Inputs are IIC Bus Compatible
There is no mention in the datasheet of the I2C protocol: start bits, stop bits, address, etc. It appears to be only
electrically compatible with the I2C bus. "Data, clock and enable" seems more like SPI to me. I'd say it's just a poorly written datasheet. Not an I2C device.