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"
....
(
-2-
Name
Function
Pin function
Bit
map
I
READ
WRITE!
ADDRESS
IA1-IA8
KEY common input
IN
MSB
LSB
0
x
10H
(Including a
I
I
I
I
I
I
I
I
I
pull-down
resistor)
8
7
6
5
4
3
2
1
K01-K08
KEY strobe
OUT
MSB
LSB
x
0
11 H
(Pch open drain)
I
I
I
I
I
I
I
I
KO
I
8
1
6
5
4
3
2
1
K09, K010
KEY strobe
OUT
MSB
LSB
x
0
12H
(Pch open
drain)
I
I
I
I
I
I
I
KO
I
KO
I
10
9
SFTIN
SHIFT key input
IN
MSB
LSB
0
x
13H
(Including a pull
I
I
I
I
I I
I
I
SIT
I
down
resistor)
TI
mer
1 S signal is set
-
MSB
LSB
0
0
14H
about every 0.6 sec.
I
I I
I I
I
I
I
1S
I
(Note) After judgement of 1 S
signal,
procedure
01H ~OUT (14H) must be performed
to reset
1
S signal latch.
I
XIN control
Controls on/off of
IN
MSB
LSB
0
0
15H
XIN input.
J
o
!I
I
I
I
I
I
I
I
I
I
O:
XIN input
inhibit
1
:
XIN input enable
Maskable interrupt
Indicates interrupt
-
MSB
LSB
0
I
0
16H
factor
generating factor
I
l
I I
I
rnTT
I
15
I
KON
I
I
with the interrupt
IA
mask
ON.
Conditions for becoming ·1
":
I
When IA-IA key input signal is
supplied.
When KON-KON key input is supplied.
1
S-D.6 sec timer signal is
supplied.
A low pulse is supplied to INT1-INT1 input pin.
To reset each
factor,
write ·1 ." With
OFH
~
I
OUT (16H),
all
factors become
O.
!
OOH
10H
ZOH
JOH
40H
SOH
60H
RESERVED
FOR SYSTEM
FREE
FREE
FOR DISPLAY
FOR DISPLAY
RESERVED
FFH
5.1/0 map
PC-E220
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