MC9S12E32CFU FREESCALE [Freescale Semiconductor, Inc], MC9S12E32CFU Datasheet - Page 140

• Manufacturer Part Number: MC9S12E32CFU
• Description: HCS12 Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Chapter 3 Port Integration Module (PIM9E128V1)
3.3.2.5
Read: Anytime. Write: Anytime.
This register configures whether a pull-up or a pull-down device is activated on configured input or
wired-or output pins. If a pin is configured as push-pull output, the corresponding Pull Device Enable
Register bit has no effect.
3.3.2.6
Read: Anytime. Write: Anytime.
The Port M Polarity Select Register selects whether a pull-down or a pull-up device is connected to the
pin. The Port M Polarity Select Register is effective only when the corresponding Data Direction Register
bit is set to 0 (input) and the corresponding Pull Device Enable Register bit is set to 1.
140
PERM[7:3,
PPSM[7:3,
7:3, 1:0
7:3, 1:0
Reset
Reset
Field
Field
1:0]
1:0]
W
W
R
R
PERM7
PPSM7
Pull Device Enable Port M
0 Pull-up or pull-down device is disabled.
1 Pull-up or pull-down device is enabled.
Pull Select Port M
0 A pull-up device is connected to the associated port M pin.
1 A pull-down device is connected to the associated port M pin.
Port M Pull Device Enable Register (PERM)
Port M Polarity Select Register (PPSM)
0
0
7
7
= Reserved or Unimplemented
= Reserved or Unimplemented
PERM6
PPSM6
Figure 3-14. Port M Pull Device Enable Register (PERM)
0
0
6
6
Figure 3-15. Port M Polarity Select Register (PPSM)
Table 3-11. PERM Field Descriptions
Table 3-12. PPSM Field Descriptions
PERM5
PPSM5
MC9S12E128 Data Sheet, Rev. 1.07
0
0
5
5
PERM4
PPSM4
0
0
4
4
Description
Description
PERM3
PPSM3
0
0
3
3
0
0
0
0
2
2
PERM1
PPSM1
Freescale Semiconductor
0
0
1
1
PERM0
PPSM0
0
0
0
0