Port Integration Module (S12PPIMV1)
2.3.27 Port S Reduced Drive Register (RDRS)
Address 0x024B
Access: User read/write(1)
7
6
5
4
3
2
1
0
R
W
0
0
0
0
RDRS3
RDRS2
RDRS1
RDRS0
Reset
0
0
0
0
0
0
0
0
Figure 2-25. Port S Reduced Drive Register (RDRS)
1. Read: Anytime
Write: Anytime
Table 2-24. RDRS Register Field Descriptions
Description
Field
3-0
Port S reduced drive—Select reduced drive for output pin
RDRS
This bit configures the drive strength of the associated output pin as either full or reduced. If a pin is used as input
this bit has no effect. The reduced drive function is independent of which function is being used on a particular pin.
1 Reduced drive selected (approx. 1/5 of the full drive strength)
0 Full drive strength enabled
2.3.28 Port S Pull Device Enable Register (PERS)
Address 0x024C
Access: User read/write(1)
7
6
5
4
3
2
1
0
R
W
0
0
0
0
PERS3
PERS2
PERS1
PERS0
Reset
0
0
0
0
1
1
1
1
Figure 2-26. Port S Pull Device Enable Register (PERS)
1. Read: Anytime
Write: Anytime
Table 2-25. PERS Register Field Descriptions
Description
Field
3-0
Port S pull device enable—Enable pull device on input pin or wired-or output pin
PERS
This bit controls whether a pull device on the associated port input pin is active. If a pin is used as output this bit has
only effect if used in wired-or mode. The polarity is selected by the related polarity select register bit.
1 Pull device enabled
0 Pull device disabled
S12P-Family Reference Manual, Rev. 1.13
Freescale Semiconductor
79
FREESCALE [ Freescale ]
