mc9s12xd256 Freescale Semiconductor, Inc, mc9s12xd256 Datasheet - Page 865
mc9s12xd256
Manufacturer Part Number
mc9s12xd256
Description
Hcs12x Microcontrollers
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC9S12XD256.pdf
(1350 pages)
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22.3.2.51 Port H Polarity Select Register (PPSH)
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.
22.3.2.52 Port H Interrupt Enable Register (PIEH)
Read: Anytime.
Write: Anytime.
This register disables or enables on a per-pin basis the edge sensitive external interrupt associated with
Port H.
Freescale Semiconductor
PPSH[7:0]
PIEH[7:0]
Reset
Reset
Field
Field
7–0
7–0
W
W
R
R
PPSH7
PIEH7
Polarity Select Port H
0 Falling edge on the associated port H pin sets the associated flag bit in the PIFH register.
1 Rising edge on the associated port H pin sets the associated flag bit in the PIFH register.
Interrupt Enable Port H
0 Interrupt is disabled (interrupt flag masked).
1 Interrupt is enabled.
0
0
7
7
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.
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.
PPSH6
PIEH6
0
0
6
6
Figure 22-54. Port H Interrupt Enable Register (PIEH)
Figure 22-53. Port H Polarity Select Register (PPSH)
Table 22-48. PPSH Field Descriptions
Table 22-49. PIEH Field Descriptions
PPSH5
MC9S12XDP512 Data Sheet, Rev. 2.17
PIEH5
0
0
5
5
PPSH4
PIEH4
0
0
4
4
Description
Description
Chapter 22 DP512 Port Integration Module (S12XDP512PIMV2)
PPSH3
PIEH3
0
0
3
3
PPSH2
PIEH2
0
0
2
2
PPSH1
PIEH1
0
0
1
1
PPSH0
PIEH0
0
0
0
0
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