MC68HC908AS60ACFN FREESCALE [Freescale Semiconductor, Inc], MC68HC908AS60ACFN Datasheet - Page 302
MC68HC908AS60ACFN
Manufacturer Part Number
MC68HC908AS60ACFN
Description
M68HC08 Microcontrollers
Manufacturer
FREESCALE [Freescale Semiconductor, Inc]
Datasheet
1.MC68HC908AS60ACFN.pdf
(414 pages)
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TO PULLUP ENABLE
TO PULLUP ENABLE
KBD0
KBD4
Keyboard Status and Control Register
Keyboard Interrupt Enable Register
Register Name
KB0IE
KB4IE
.
.
.
(KBSCR)
(KBIER)
Figure 24-1. Keyboard Module Block Diagram
Reset:
Reset:
Read:
Write:
Read:
Write:
Table 24-1. I/O Register Address Summary
Register
Address
Figure 24-2. I/O Register Summary
Bit 7
0
0
0
0
MODEK
= Unimplemented
V
DD
KBSCR
6
0
0
0
0
$001B
D
CK
CLR
Q
5
0
0
0
0
INTERRUPT FF
KEYBOARD
KBIE4
4
0
0
0
KBIER
$0021
RESET
ACKK
KBIE3
KEYF
3
0
0
VECTOR FETCH
INTERNAL BUS
DECODER
IMASKK
KBIE2
ACKK
2
SYNCHRONIZER
0
0
0
IMASKK
KBIE1
1
0
0
KEYF
MODEK
KBIE0
Bit 0
0
0
KEYBOARD
INTERRUPT
REQUEST
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