how to configure PDR, DDR, PIER to well-drive ports for Seg LCD

[WonjinHan]

Dears.

We used MB96F6B5R to control segment LCD with internal Seg LCD driver in Automotive HVAC.
Sometimes brightness of some LCD Segs are slightly a little bit dim out.
so we would like to know that there is a recommendation about how to configure registers
as the following to well-drive port pins as COM# or Seg# which are connected to the Seg LCD exactly.

1. PDR : Port Data Register.
2. DDR : Data Direction Register
3. PIER : Port Input Enable Register

Plus Is there any download link for example code ?

Thanks
Kevin Han.