MC68HC812A4 Datasheet, PDF (149/342 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
9.3.10 Port J Data Direction Register
Address: $0029
Bit 7
6
5
4
3
2
1
Read:
DDRJ7
Write:
DDRJ6
DDRJ5
DDRJ4
DDRJ3
DDRJ2
DDRJ1
Reset: 0
0
0
0
0
0
0
Figure 9-10. Port J Data Direction Register (DDRJ)
Determines direction of each port J pin.
Bit 0
DDRJ0
0
DDRJ7–DDRJ0 — Data Direction Port J
1 = Associated pin is an output.
0 = Associated pin is an input.
9.3.11 Port J Key Wakeup Interrupt Enable Register
Address: $002A
Bit 7
6
5
4
3
2
1
Bit 0
Read:
KWIEJ7 KWIEJ6 KWIEJ5 KWIEJ4 KWIEJ3 KWIEJ2 KWIEJ1 KWIEJ0
Write:
Reset: 0
0
0
0
0
0
0
0
Figure 9-11. Port J Key Wakeup Interrupt Enable
Register (KWIEJ)
Read: Anytime
Write: Anytime
An interrupt is generated when a bit in the KWIFJ register and its
corresponding KWIEJ bit are both set. These bits correspond to the pins
of port J. All eight bits/pins share the same interrupt vector.
KWIEJ7–KWIEF0 — Key Wakeup Port J 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
149