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UCD3138 Technical Reference Manual document description question

Hi team,

   In UCD3138 Technical Reference Manual document,page 397 has below description:

"The clock then runs through a prescaler. The prescaler is controlled by an 8 bit register. Register values
from 0 to 255 correspond to dividing the clock by 1 to 256."

In page 406, Table 11-2 also show below description: 

PRESCALE  reset value 0

Defines the prescaler value used to select the 24-bit counter resolution. The
minimum divider ratio is 4, prescaler value less than 3 defaults to 3.

The questions is the divider clock of the T24 is 1-256 or 4-256 ?

Thanks.