mc9s12xs128 Freescale Semiconductor, Inc, mc9s12xs128 Datasheet - Page 100

• Manufacturer Part Number: mc9s12xs128
• Description: Hcs12 Microcontrollers 16-bit Automotive Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

1
1
Port Integration Module (S12XSPIMV1)
2.3.38
2.3.39
100
Address 0x0254
Address 0x0255
Read: Anytime.
Write: Anytime.
Read: Anytime.
Write: Anytime.
PERM
PPSM
Field
Field
Reset
Reset
7-0
7-0
W
W
R
R
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
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
PERM7
PPSM7
Port M Pull Device Enable Register (PERM)
Port M Polarity Select Register (PPSM)
0
0
7
7
PERM6
PPSM6
Figure 2-36. Port M Pull Device Enable Register (PERM)
0
0
6
6
Figure 2-37. Port M Polarity Select Register (PPSM)
Table 2-34. PERM Register Field Descriptions
Table 2-35. PPSM Register Field Descriptions
S12XS Family Reference Manual, Rev. 1.10
PERM5
PPSM5
0
0
5
5
PERM4
PPSM4
0
0
4
4
Description
Description
PERM3
PPSM3
3
0
3
0
PERM2
PPSM2
0
0
2
2
Freescale Semiconductor
PERM1
PPSM1
Access: User read/write
Access: User read/write
0
0
1
1
PERM0
PPSM0
0
0
0
0
1
1