MC68HC812A4 Datasheet, PDF (150/342 Pages) Motorola, Inc – 16-bit device composed of standard on-chip peripheral modules connected by an intermodule bus. Modules include

Key Wakeups
9.3.12 Port J Key Wakeup Flag Register
Address: $002B
Bit 7
6
5
4
3
2
1
Bit 0
Read:
KWIFJ7 KWIFJ6 KWIFJ5 KWIFJ4 KWIFJ3 KWIFJ2 KWIFJ1 KWIFJ0
Write:
Reset: 0
0
0
0
0
0
0
0
Figure 9-12. Port J Key Wakeup Flag Register (KWIFJ)
Read: Anytime
Write: Anytime
Each flag gets set by an active edge on the associated input pin. This
could be a rising or falling edge based on the state of the KPOLJ register.
To clear the flag, write 1 to the corresponding bit in KWIFJ.
Initialize this register after initializing KPOLJ so that illegal flags can be
cleared.
KWIFJ7–KWIFJ0 — Key Wakeup Port J Flags
1 = An active edge on the associated bit has occurred. An interrupt
occurs if the associated enable bit is set.
0 = An active edge on the associated bit has not occurred.
9.3.13 Port J Key Wakeup Polarity Register
Address: $002C
Bit 7
6
5
4
3
2
1
Bit 0
Read:
KPOLJ7 KPOLJ6 KPOLJ5 KPOLJ4 KPOLJ3 KPOLJ2 KPOLJ1 KPOLJ0
Write:
Reset: 0
0
0
0
0
0
0
0
Figure 9-13. Port J Key Wakeup Polarity Register (KPOLJ)
Read: Anytime
Write: Anytime
MC68HC812A4 — Rev. 3.0
150
Key Wakeups
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