MC908AZ60ACFUER Datasheet, PDF (302/414 Pages) Freescale Semiconductor, Inc – To provide the most up-to-date information, the revision of our documents on the World Wide Web will be the most current. Your printed copy may be an earlier revision. To verify you have the latest information available, refer to:

INTERNAL BUS
KBD0
TO PULLUP ENABLE
KBD4
.
.
KB0IE
.
V_DD
D ^CLR Q
CK
ACKK
RESET
VECTOR FETCH
DECODER
KEYF
SYNCHRONIZER
KEYBOARD
INTERRUPT FF
IMASKK
KEYBOARD
INTERRUPT
REQUEST
TO PULLUP ENABLE
KB4IE
MODEK
Figure 24-1. Keyboard Module Block Diagram
Register Name
Bit 7
6
Read: 0
0
Keyboard Status and Control Register
(KBSCR)
Write:
Reset: 0
0
Read: 0
0
Keyboard Interrupt Enable Register
(KBIER)
Write:
Reset: 0
0
5
4
3
2
1
Bit 0
0
0
KEYF
0
IMASKK MODEK
ACKK
0
0
0
0
0
0
0
KBIE4 KBIE3 KBIE2 KBIE1 KBIE0
0
0
0
0
0
0
= Unimplemented
Figure 24-2. I/O Register Summary
Table 24-1. I/O Register Address Summary
Register
Address
KBSCR
$001B
KBIER
$0021