mc9s12e256 Freescale Semiconductor, Inc, mc9s12e256 Datasheet - Page 135

• Manufacturer Part Number: mc9s12e256
• Description: Hcs12 Microcontrollers 16-bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

3.3.1.8
Read: Anytime. Write: Anytime.
Each flag is set by an active edge on the associated input pin. The active edge could be rising or falling
based on the state of the corresponding PPSADx bit. To clear each flag, write “1” to the corresponding
PIFADx bit. Writing a “0” has no effect.
Freescale Semiconductor
PIFAD[15:0]
Reset
Reset
Field
15:0
W
W
R
R
PIFAD15
PIFAD7
Interrupt Flags Port AD
0 No active edge pending. Writing a “0” has no effect.
1 Active edge on the associated bit has occurred (an interrupt will occur if the associated enable bit is set).
Port AD Interrupt Flag Register (PIFAD)
0
0
7
7
Writing a “1” clears the associated flag.
If the ATDDIEN0(1) bit of the associated pin is set to 0 (digital input buffer
is disabled), active edges can not be detected.
PIFAD14
PIFAD6
0
0
6
6
Figure 3-9. Port AD Interrupt Flag Register (PIFAD)
PIFAD13
Table 3-8. PIFAD Field Descriptions
PIFAD5
MC9S12E256 Data Sheet, Rev. 1.08
0
0
5
5
PIFAD12
PIFAD4
NOTE
0
0
4
4
Description
PIFAD11
PIFAD3
3
0
3
0
Chapter 3 Port Integration Module (PIM9E256V1)
PIFAD10
PIFAD2
0
0
2
2
PIFAD9
PIFAD1
0
0
1
1
PIFAD8
PIFAD0
0
0
0
0
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