Datasheet

MC68HC908AZ60A • MC68HC908AS60A • MC68HC908AS60E Data Sheet, Rev. 6
302 Freescale Semiconductor Keyboard Module (KBI)
Figure 24-1. Keyboard Module Block Diagram
Register Name Bit 7654321Bit 0
Keyboard Status and Control Register
(KBSCR)
Read:0000KEYF0
IMASKK MODEK
Write:
ACKK
Reset:00000000
Keyboard Interrupt Enable Register
(KBIER)
Read: 0 0 0
KBIE4 KBIE3 KBIE2 KBIE1 KBIE0
Write:
Reset:00000000
= Unimplemented
Figure 24-2. I/O Register Summary
Table 24-1. I/O Register Address Summary
Register KBSCR KBIER
Address $001B $0021
KB0IE
KB4IE
.
.
.
KEYBOARD
INTERRUPT
DQ
CK
CLR
V
DD
MODEK
IMASKK
KEYBOARD
INTERRUPT FF
REQUEST
VECTOR FETCH
DECODER
ACKK
INTERNAL BUS
RESET
TO PULLUP ENABLE
KBD4
KBD0
TO PULLUP ENABLE
SYNCHRONIZER
KEYF