Datasheet

Port Integration Module (S12XSPIMV1)
S12XS Family Reference Manual, Rev. 1.13
94 Freescale Semiconductor
2.3.29 Port S Reduced Drive Register (RDRS)
2.3.30 Port S Pull Device Enable Register (PERS)
Address 0x024A Access: User read/write
1
1
Read: Anytime
Write: Anytime
76543210
R
RDRS7 RDRS6 RDRS5 RDRS4 RDRS3 RDRS2 RDRS1 RDRS0
W
Reset 00000000
Figure 2-27. Port S Reduced Drive Register (RDRS)
Table 2-26. RDRS Register Field Descriptions
Field Description
7-0
RDRS
Port S reduced drive—Select reduced drive for output pin
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
Address 0x024B Access: User read/write
1
1
Read: Anytime
Write: Anytime
76543210
R
PERS7 PERS6 PERS5 PERS4 PERS3 PERS2 PERS1 PERS0
W
Reset 11111111
Figure 2-28. Port S Pull Device Enable Register (PERS)
Table 2-27. PERS Register Field Descriptions
Field Description
7-0
PERS
Port S pull device enable—Enable pull device on input pin or wired-or output pin
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