MC68HC812A4 Datasheet, PDF (148/342 Pages) Motorola, Inc – 16-bit device composed of standard on-chip peripheral modules connected by an intermodule bus. Modules include

Key Wakeups
9.3.8 Port H Key Wakeup Flag Register
Address: $0027
Bit 7
6
5
4
3
2
1
Bit 0
Read:
KWIFH7 KWIFH6 KWIFH5 KWIFH4 KWIFH3 KWIFH2 KWIFH1 KWIFH0
Write:
Reset: 0
0
0
0
0
0
0
0
Figure 9-8. Port H Key Wakeup Flag Register (KWIFH)
Read: Anytime
Write: Anytime
Each flag is set by a falling edge on its associated input pin. To clear the
flag, write one to the corresponding bit in KWIFH.
KWIFH7–KWIFH0 — Key Wakeup Port H Flags
1 = Falling edge on the associated bit has occurred (an interrupt
occurs if the associated enable bit is set)
0 = Falling edge on the associated bit has not occurred
9.3.9 Port J Data Register
Address: $0028
Bit 7
6
5
4
3
2
Read:
PJ7
PJ6
PJ5
PJ4
PJ3
PJ2
Write:
Reset: 0
0
0
0
0
0
Alternate pin function: KWJ7 KWJ6 KWJ5 KWJ2 KWJ4 KWJ2
Figure 9-9. Port J Data Register (PORTJ)
Read: Anytime
Write: Anytime
1
PJ1
0
KWJ1
Bit 0
PJ0
0
KWJ0
Port J is associated with key wakeup J. Key wakeups can be used with
the pins designated as inputs or outputs. DDRJ determines whether
each pin is an input or output.
MC68HC812A4 — Rev. 3.0
148
Key Wakeups
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