MC68HC812A4 Datasheet, PDF (147/342 Pages) Motorola, Inc – 16-bit device composed of standard on-chip peripheral modules connected by an intermodule bus. Modules include

Key Wakeups
Key Wakeup Registers
9.3.6 Port H Data Direction Register
Address: $0025
Bit 7
6
5
4
3
2
1
Read:
DDRH7 DDRH6 DDRH5 DDRH4 DDRH3 DDRH2 DDRH1
Write:
Reset: 0
0
0
0
0
0
0
Figure 9-6. Port H Data Direction Register (DDRH)
Read: Anytime
Write: Anytime
Bit 0
DDRH0
0
Data direction register H is associated with port H and designates each
pin as an input or output.
DDRH7–DDRH0 — Data Direction Port H Bits
1 = Associated pin is an output.
0 = Associated pin is an input.
9.3.7 Port H Key Wakeup Interrupt Enable Register
Address: $0026
Bit 7
6
5
4
3
2
1
Bit 0
Read:
KWIEH7 KWIEH6 KWIEH5 KWIEH4 KWIEH3 KWIEH2 KWIEH1 KWIEH0
Write:
Reset: 0
0
0
0
0
0
0
0
Figure 9-7. Port H Key Wakeup Interrupt Enable Register (KWIEH)
An interrupt is generated when a bit in the KWIFH register and its
corresponding KWIEH bit are both set. These bits correspond to the pins
of port H.
KWIEH7–KWIEH0 — Key Wakeup Port H Interrupt Enable Bits
1 = Interrupt for the associated bit is enabled.
0 = Interrupt for the associated bit is disabled.
Advance Information
MOTOROLA
Key Wakeups
MC68HC812A4 — Rev. 3.0
147