mc9s12ne64 Freescale Semiconductor, Inc, mc9s12ne64 Datasheet - Page 129

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

3.3.2.5.5
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.
This bit has no effect if the port is used as output. Out of reset pull-up device is enabled for bits PJ[7:6]
and disabled for bits PJ[3:0].
PERJ[7:6][3:0] — Pull Device Enable Port J
3.3.2.5.6
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.
PPSJ[7:6][3:0] — Polarity Select Port J
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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 J pin sets the associated flag bit in the PIFJ register. A
0 = Falling edge on the associated port J pin sets the associated flag bit in the PIFJ register. A pull-up
Module Base + $24
Module Base + $25
Reset:
Reset:
Read:
Read:
Write:
Write:
pull-down device is connected to the associated port J pin, if enabled by the associated bit in
register PERJ and if the port is used as input.
device is connected to the associated port J pin, if enabled by the associated bit in register PERJ
and if the port is used as input.
Pull Device Enable Register (PERJ)
Polarity Select Register (PPSJ)
PERJ7
PPSJ7
Bit 7
Bit 7
1
0
Figure 3-35. Port J Pull Device Enable Register (PERJ)
= Reserved or unimplemented
= Reserved or unimplemented
PERJ6
PPSJ6
Figure 3-36. Port J Polarity Select Register (PPSJ)
6
1
6
0
MC9S12NE64 Data Sheet, Rev. 1.1
—
—
5
0
5
0
—
—
4
0
4
0
PERJ3
PPSJ3
3
0
3
0
PERJ2
PPSJ2
2
0
2
0
Memory Map and Register Descriptions
PERJ1
PPSJ1
1
0
1
0
PERJ0
PPSJ0
Bit 0
Bit 0
0
0
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