mc9s12q128 Freescale Semiconductor, Inc, mc9s12q128 Datasheet - Page 94

• Manufacturer Part Number: mc9s12q128
• Description: Hcs12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Chapter 2 Port Integration Module (PIM9C32) Block Description
2.3.2.4.5
Read: Anytime.
Write: Anytime.
2.3.2.4.6
Read: Anytime.
Write: Anytime.
94
Module Base + 0x001C
Module Base + 0x001D
PERP[7:0]
PPSP[7:0]
Reset
Reset
Field
Field
7–0
7–0
W
W
R
R
PERP7
PPSP7
Pull Device Enable Port P — 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 no pull device is enabled.
0 Pull-up or pull-down device is disabled.
1 Either a pull-up or pull-down device is enabled.
Pull Select Port P — 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.
0 Falling edge on the associated port P pin sets the associated flag bit in the PIFP register.A pull-up device is
1 Rising edge on the associated port P pin sets the associated flag bit in the PIFP register.A pull-down device
0
0
7
7
connected to the associated port P pin, if enabled by the associated bit in register PERP and if the port is used
as input.
is connected to the associated port P pin, if enabled by the associated bit in register PERP and if the port is
used as input.
Port P Pull Device Enable Register (PERP)
Port P Polarity Select Register (PPSP)
PERP6
PPSP6
Figure 2-28. Port P Pull Device Enable Register (PERP)
0
0
6
6
Figure 2-29. Port P Polarity Select Register (PPSP)
Table 2-24. PERP Field Descriptions
Table 2-25. PPSP Field Descriptions
PERP5
PPSP5
0
0
5
5
MC9S12Q128
PERP4
PPSP4
Rev 1.09
0
0
4
4
Description
Description
PERP3
PPSP3
0
0
3
3
PERP2
PPSP2
0
0
2
2
PERP1
PPSP1
Freescale Semiconductor
0
0
1
1
PERP0
PPSP0
0
0
0
0