
Auto Wakeup Module (AWU)
Input/Output Registers
MC68HC908QF4 — Rev. 1.0
Data Sheet
MOTOROLA
Auto Wakeup Module (AWU)
49
ACKK — Keyboard Acknowledge Bit
Writing a 1 to this write-only bit clears the keyboard/auto wakeup interrupt
request on port A and auto wakeup logic. ACKK always reads as 0. Reset clears
ACKK.
IMASKK— Keyboard Interrupt Mask Bit
Writing a 1 to this read/write bit prevents the output of the keyboard interrupt
mask from generating interrupt requests on port A or auto wakeup. Reset clears
the IMASKK bit.
1 = Keyboard/auto wakeup interrupt requests masked
0 = Keyboard/auto wakeup interrupt requests not masked
NOTE:
MODEK is not used in conjuction with the auto wakeup feature. To see a
4.6.3 Keyboard Interrupt Enable Register
The keyboard interrupt enable register (KBIER) enables or disables the auto
wakeup to operate as a keyboard/auto wakeup interrupt input.
AWUIE — Auto Wakeup Interrupt Enable Bit
This read/write bit enables the auto wakeup interrupt input to latch interrupt
requests. Reset clears AWUIE.
1 = Auto wakeup enabled as interrupt input
0 = Auto wakeup not enabled as interrupt input
NOTE:
KBIE5–KBIE0 bits are not used in conjuction with the auto wakeup feature. To see
Address: $001B
Bit 7
654321
Bit 0
Read:
0
AWUIE
KBIE5
KBIE4
KBIE3
KBIE2
KBIE1
KBIE0
Write:
Reset:
00000000
= Unimplemented
Figure 4-5. Keyboard Interrupt Enable Register (KBIER)
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