S9S12XS256J0CAL Datasheet, PDF (100/738 Pages) Freescale Semiconductor, Inc – Microcontrollers

Port Integration Module (S12XSPIMV1)
2.3.38 Port M Pull Device Enable Register (PERM)
Address 0x0254
R
W
Reset
7
PERM7
0
1 _{Read: Anytime}
Write: Anytime
6
PERM6
5
PERM5
4
PERM4
3
PERM3
2
PERM2
Access: User read/write¹
1
0
PERM1
PERM0
0
0
0
0
0
0
0
Figure 2-36. Port M Pull Device Enable Register (PERM)
Table 2-34. PERM Register Field Descriptions
Field
7-0
PERM
Description
Port M 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
2.3.39 Port M Polarity Select Register (PPSM)
Address 0x0255
R
W
Reset
7
PPSM7
0
1 _{Read: Anytime}
Write: Anytime
6
PPSM6
5
PPSM5
4
PPSM4
3
PPSM3
2
PPSM2
0
0
0
0
0
Figure 2-37. Port M Polarity Select Register (PPSM)
Access: User read/write¹
1
0
PPSM1
PPSM0
0
0
Table 2-35. PPSM Register Field Descriptions
Field
7-0
PPSM
Description
Port M pull device select—Configure pull device polarity on input pin
This bit selects a pull-up or a pull-down device if enabled on the associated port input pin.
If CAN0 is active the selection of a pull-down device on the RXCAN input will have no effect.
1 A pull-down device selected
0 A pull-up device selected
S12XS Family Reference Manual, Rev. 1.13
100
Freescale Semiconductor