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BU4094BCFV (DSP ASSY : IC2101, IC2107, IC2108, IC2118)
• Port Expander
•
Block Diagram
DATA
2
8-STAGE
SHIFT REGISTER
CLOCK
3
8-BIT
STROBE
1
LATCHES
3-STATE
OUTPUT
15
OUTPUTS
ENABLE
4
Q1
PARALLEL OUTPUT
•
Pin Function
N
. o
M
a
k r
1
S
T
R
O
B
E
_
S
2
S
E
R
A I
L
N I
D
3
C
L
O
C
K
C
4
Q
1
N I
5
Q
2
N I
6
Q
3
N I
7
Q
4
1
8
V
S
S
V
9
Q
S
Q
1
0
Q
' S
Q
1
1
Q
8
I H
1
2
Q
7
R
1
3
Q
6
R
1
4
Q
5
R
1
5
O
U
T
P
U
T
E
N
A
B
L
E
O
1
6
V
D
D
V
10
Q's
SERIAL
OUTPUT
9 Qs
14
Q8
P
n i
N
a
m
e
/ I
O
T
B
I
t S
A
T
A
I
S
L
O
C
K
I
S
P
U
T
S
E
L
1
N I
P
U
T
S
E
L
2
O
N I
P
U
T
S
E
L
3
N I
9
2
K
H
z
O
1
−
S
S
V
S
O
C
' S
O
N
B -
T I
O
i H
E
C
S
E
L
3
R
E
C
S
E
L
2
O
R
E
C
S
E
L
1
R
E
I
C
−
D
D
V
•
Truth Table
OUTPUT
CLOCK
STROBE DATA
ENABLE
±
L
X
≠
L
X
±
H
L
±
H
H
±
H
H
≠
H
X
X : Don't Care
Z : High Impedance
P
o r
b
e
n i
p
u
( t
C I
2
1
0
2
p
n i
2
) 3
r e
l a i
d
a
a t
n i
p
u
( t
C I
2
1
0
2
p
n i
2
) 1
r e
a i
c l
o l
k c
n i
p
u
( t
C I
2
1
0
2
p
n i
2
) 2
P
U
T
s
e
e l
t c
r o
1
P
U
T
s
e
e l
t c
r o
2
P
U
T
s
e
e l
t c
r o
3
9
2
k
H
z
p
a l
y
b
a
k c
: H
P
D
F I
1
9
2
k
S
S
o
n
n
e
t c
o t
p
n i
2
(
D
A
T
) A
f o
C I
2
1
t o
u
s
e
d
b -
t i
p
a l
y
b
a
k c
: H
i H
b -
t i
p
a l
y
b
a
k c
E
C
s
e
e l
t c
r o
3
E
C
s
e
e l
t c
r o
2
E
C
s
e
e l
t c
r o
1
h
p i
e
n
a
b
e l
n i
p
u
( t
C I
2
1
0
2
p
n i
2
) 8
D
D
PARALLEL
OUTPUTS
OUTPUTS
Q1
Qn
Qs
X
Z
Z
Qs
X
Z
Z
No Chg.
X
No Chg. No Chg.
Q7
L
L
Qn-1
Q7
H
H
Qn-1
Q7
X
No Chg. No Chg.
No Chg.
n i
F
u
n
t c
o i
n
H
z
s
g i
n
l a
1
8
C-AX10
SERIAL
Q's
No Chg.
Qs
No Chg.
No Chg.
No Chg.
Qs
101
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