MC68HC908GT16 Datasheet, PDF (197/412 Pages) Motorola, Inc – Microcontrollers

KBD0
TO PULLUP ENABLE
.
.
KB0IE
.
KBD7
TO PULLUP ENABLE
KB7IE
V_DD
CLR
D
Q
CK
MODEK
INTERNAL BUS
ACKK
RESET
VECTOR FETCH
DECODER
KEYF
SYNCHRONIZER
IMASKK
Figure 13-1. Keyboard Module Block Diagram
KEYBOARD
INTERRUPT
REQUEST
Addr. Register Name
Bit 7
$001A
Keyboard Status ^{Read: 0}
and Control Register
(INTKBSCR)
Write:
See page 201. _{Reset: 0}
Keyboard Interrupt Enable ^Read:
$001B
Register
(INTKBIER)
Write:
See page 202. _Reset:
KBIE7
0
6
5
0
0
0
0
KBIE6 KBIE5
0
0
= Unimplemented
4
0
0
KBIE4
0
3
KEYF
0
KBIE3
0
2
0
ACKK
0
1
Bit 0
IMASKK MODEK
0
0
KBIE2 KBIE1 KBIE0
0
0
0
Figure 13-2. I/O Register Summary