MC9S12HZ256 Datasheet, PDF (145/692 Pages) Freescale Semiconductor, Inc – HCS12 Microcontrollers

4.3.5.4
Chapter 4 Port Integration Module (PIM9HZ256V2)
Port S Reduced Drive Register (RDRS)
7
6
5
4
3
R
0
RDRS7
RDRS6
RDRS5
RDRS4
W
2
1
0
0
RDRS1
RDRS0
Reset
0
0
0
0
0
0
0
0
= Reserved or Unimplemented
Figure 4-33. Port S Reduced Drive Register (RDRS)
Read: Anytime. Write: Anytime.
This register configures the drive strength of configured output pins as either full or reduced. If a pin is
configured as input, the corresponding Reduced Drive Register bit has no effect.
Table 4-24. RDRS Field Descriptions
Field
Description
7:4
Reduced Drive Port S
RDRS[7:4] 0 Full drive strength at output.
1 Associated pin drives at about 1/3 of the full drive strength.
1:0
Reduced Drive Port S
RDRS[1:0] 0 Full drive strength at output.
1 Associated pin drives at about 1/3 of the full drive strength.
MC9S12HZ256 Data Sheet, Rev. 2.04
Freescale Semiconductor
145