MC68HC08AZ0 Datasheet, PDF (326/444 Pages) Motorola, Inc – Advance Information

Freescale Semiconductor, Inc.
Keyboard Module (KB)
ACKK — Keyboard acknowledge bit
Writing a logic one to this read/write bit clears the keyboard interrupt
latch. ACKK always reads as logic zero. Reset clears ACKK.
IMASKK — Keyboard interrupt mask bit
Writing a logic one to this read/write bit prevents the output of the
keyboard interrupt mask from generating interrupt requests. Reset
clears the IMASKK bit.
1 = Keyboard interrupt requests disabled
0 = Keyboard interrupt requests enabled
MODEK — Keyboard triggering sensitivity bit
This read/write bit controls the triggering sensitivity of the keyboard
interrupt pins. Reset clears MODEK.
1 = Keyboard interrupt requests on falling edges and low levels
0 = Keyboard interrupt requests on falling edges only
Keyboard interrupt
enable register
(KBIER)
The keyboard interrupt enable register enables or disables each port G
or port H pin to operate as a keyboard interrupt pin.
Bit 7
6
5
4
3
2
1
KBIER ^Read:
0
$0021 _Write:
0
0
KBIE4 KBIE3 KBIE2 KBIE1
Reset
0
0
0
0
0
0
0
= Unimplemented
Figure 7. Keyboard interrupt enable register (KBIER)
Bit 0
KBIE0
0
KBIE4:KBIE0 — Keyboard interrupt enable bits
Each of these read/write bits enables the corresponding keyboard
interrupt pin to latch interrupt requests. Reset clears the keyboard
interrupt enable register.
1 = Pin enabled as keyboard interrupt pin
0 = Pin not enabled as keyboard interrupt pin
MC68HC08AZ0
324
Keyboard Module (KB)
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6-kbd
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