mc9s12ne64 Freescale Semiconductor, Inc, mc9s12ne64 Datasheet - Page 125

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

3.3.2.4.5
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.
These bits have no effect if the port is used as output. Out of reset no pull device is enabled.
PERH[6:0] — Pull Device Enable Port H
3.3.2.4.6
Read:Anytime.
Write:Anytime.
This register serves a dual purpose by selecting the polarity of the active interrupt edge as well as selecting
a pull-up or pull-down device if enabled.
PPSH[6:0] — Pull Select Port H
Freescale Semiconductor
1 = Either a pull-up or pull-down device is enabled.
0 = Pull-up or pull-down device is disabled.
1 = Rising edge on the associated port H pin sets the associated flag bit in the PIFH register.A
0 = Falling edge on the associated port H pin sets the associated flag bit in the PIFH register.A
Module Base + $1C
Module Base + $1D
Reset:
Reset:
Read:
Read:
Write:
Write:
pull-down device is connected to the associated port H pin, if enabled by the associated bit in
register PERH and if the port is used as input.
pull-up device is connected to the associated port H pin, if enabled by the associated bit in
register PERH and if the port is used as input.
Pull Device Enable Register (PERH)
Polarity Select Register (PPSH)
Bit 7
Bit 7
—
—
0
0
Figure 3-27. Port H Pull Device Enable Register (PERH)
= Reserved or unimplemented
= Reserved or unimplemented
PERH6
PPSH6
Figure 3-28. Port H Polarity Select Register (PPSH)
6
0
6
0
MC9S12NE64 Data Sheet, Rev. 1.1
PERH5
PPSH5
5
0
5
0
PERH4
PPSH4
4
0
4
0
PERH3
PPSH3
3
0
3
0
PERH2
PPSH2
2
0
2
0
Memory Map and Register Descriptions
PERH1
PPSH1
1
0
1
0
PERH0
PPSH0
Bit 0
Bit 0
0
0
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