mc9s12ne64 Freescale Semiconductor, Inc, mc9s12ne64 Datasheet - Page 118

• Manufacturer Part Number: mc9s12ne64
• Description: Hcs12 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Chapter 3 Port Integration Module (PIM9NE64V1)
RDRS[7:0] — Reduced Drive Port S
3.3.2.2.5
Read:Anytime.
Write:Anytime.
This register configures whether a pull-up or a pull-down device is activated, if the port is used as input or
as output in wired-or (open drain) mode. These bits have no effect if the port is used as push-pull output.
Out of reset a pull-up device is enabled.
PERS[7:0] — Pull Device Enable Port S
3.3.2.2.6
Read:Anytime.
Write:Anytime.
This register selects whether a pull-down or a pull-up device is connected to the pin.
PPSS[7:0] — Pull Select Port S
118
1 = Associated pin drives at about 1/3 of the full drive strength.
0 = Full drive strength at output.
1 = Either a pull-up or pull-down device is enabled.
0 = Pull-up or pull-down device is disabled.
1 = A pull-down device is connected to the associated port S pin, if enabled by the associated bit in
0 = A pull-up device is connected to the associated port S pin, if enabled by the associated bit in
Module Base + $C
Module Base + $D
Reset:
Reset:
Read:
Read:
Write:
Write:
register PERS and if the port is used as input.
PERS register and if the port is used as input or as wired-or output.
Pull Device Enable Register (PERS)
Polarity Select Register (PPSS)
PERS7
PPSS7
Bit 7
Bit 7
1
0
Figure 3-12. Port S Pull Device Enable Register (PERS)
PERS6
PPSS6
Figure 3-13. Port S Polarity Select Register (PPSS)
6
1
6
0
MC9S12NE64 Data Sheet, Rev. 1.1
PERS5
PPSS5
5
1
5
0
PERS4
PPSS4
4
1
4
0
PERS3
PPSS3
3
1
3
0
PERS2
PPSS2
2
1
2
0
PERS1
PPSS1
1
1
1
0
Freescale Semiconductor
PERS0
PPSS0
Bit 0
Bit 0
1
0