MC68HC08AZ60A Datasheet, PDF (397/480 Pages) Motorola, Inc – Microcontrollers

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 22-1. Keyboard Module Block Diagram
Register Name
Bit 7
6
Read: 0
0
Keyboard Status and Control Reg-
ister (KBSCR)
Write:
Reset: 0
0
Read: 0
0
Keyboard Interrupt Enable Regis-
ter (KBIER)
Write:
Reset: 0
0
5
4
3
0
0
KEYF
0
0
0
0
KBIE4 KBIE3
0
0
0
= Unimplemented
Figure 22-2. I/O Register Summary
2
0
ACKK
0
KBIE2
0
1
Bit 0
IMASKK MODEK
0
0
KBIE1 KBIE0
0
0
Table 22-1. I/O Register Address Summary
Register
Address
KBSCR
$001A
KBIER
$001B