MCF8316A: Units for DIGITAL_SPEED_CTRL

I intend to use SPEED_MODE 10b and control speed via I2C through DIGITAL_SPEED_CTRL register. Given the field for DIGITAL_SPEED_CTRL takes 15 bits in ALGO_CTRL_1, what are the units of  DIGITAL_SPEED_CTRL? Are they still percentages of MAX_SPEED or may some fractions of percentages? I could not find any explanation in the datasheet.

Regards

Eugene