Chapter 4 Port Integration Module (S12XDP512PIMV2)
MC9S12XDP512 Data Sheet, Rev. 2.11
252 Freescale Semiconductor
4.3.2.61 Port J Interrupt Flag Register (PIFJ)
Read: Anytime.
Write: Anytime.
Each flag is set by an active edge on the associated input pin. This could be a rising or a falling edge based
on the state of the PPSJ register. To clear this flag, write logic level “1” to the corresponding bit in the PIFJ
register. Writing a “0” has no effect.
4.3.2.62 Port AD0 Data Register 1 (PT1AD0)
Read: Anytime.
Write: Anytime.
This register is associated with AD0 pins PAD[23:10]. These pins can also be used as general purpose I/O.
If the data direction bits of the associated I/O pins are set to 1, a read returns the value of the port register,
otherwise the value at the pins is read.
0x026F
76543210
R
PIFJ7 PIFJ6 PIFJ5 PIFJ4
0
PIFJ2 PIFJ1 PIFJ0
W
Reset 00000000
= Unimplemented or Reserved
Figure 4-63. Port J Interrupt Flag Register (PIFJ)
Table 4-57. PIEJ Field Descriptions
Field Description
7–0
PIFJ[7:4]
PIFJ[2:0]
Interrupt Flags Port J
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).
Writing a logic level “1” clears the associated flag.
0x0271
76543210
R
PT1AD07 PT1AD06 PT1AD05 PT1AD04 PT1AD03 PT1AD02 PT1AD01 PT1AD00
W
Reset 00000000
Figure 4-64. Port AD0 Data Register 1 (PT1AD0)