
Chapter 2 Port Integration Module (S12XEPIMV1)
MC9S12XE-Family Reference Manual , Rev. 1.07
142
Freescale Semiconductor
2.3.59
Port H Interrupt Enable Register (PIEH)
Read: Anytime.
2.3.60
Port H Interrupt Flag Register (PIFH)
Table 2-53. PPSH Register Field Descriptions
Field
Description
7-0
PPSH
Port H pull device select
—Determine pull device polarity on input pins
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.
1 A rising edge on the associated Port H pin sets the associated flag bit in the PIFH register. A 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.
0 A falling edge on the associated Port H pin sets the associated flag bit in the PIFH register.A 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.
Address 0x025E
Access: User read/write
1
1
Read: Anytime.
Write: Anytime.
7
6
5
4
3
2
1
0
R
PIEH7
PIEH6
PIEH5
PIEH4
PIEH3
PIEH2
PIEH1
PIEH0
W
Reset
0
0
0
0
0
0
0
0
Figure 2-57. Port H Interrupt Enable Register (PIEH)
Table 2-54. PPSP Register Field Descriptions
Field
Description
7-0
PIEH
Port H interrupt enable
—
This register disables or enables on a per-pin basis the edge sensitive external interrupt associated with Port H.
1 Interrupt is enabled.
0 Interrupt is disabled (interrupt flag masked).
Address 0x025F
Access: User read/write
1
1
Read: Anytime.
Write: Anytime.
7
6
5
4
3
2
1
0
R
PIFH6
PIFH5
PIFH4
PIFH3
PIFH2
PIFH1
PIFH0
W
Reset
0
0
0
0
0
0
0
0
Figure 2-58. Port H Interrupt Flag Register (PIFH)