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4.4 BU2092 (IC811) : Port expander
• Terminal layout
CLOCK
• Pin Function
Pin No.
Symbol
1
Vss
2
DATE
3
CLOCK
4
LCK
5~16
Q0~Q11
17
OE
18
Vdd
1
Vss
DATA
2
3
LCK
4
Q0
5
Q1
6
Q2
7
Q3
8
Q4
9
I/O
Function
-
Connect to GND
I
Serial Date input
I
Shift Clock of Date
I
Latch Clock of Date
O
Parallel Date Output
Latch Data
L
OUTPUT
ON OFF
I
Output Enable
-
Power Supply
CONTROL
CIRCUIT
H
Vdd
18
OE
17
Q11
16
Q10
15
Q9
14
Q8
13
Q7
12
Q6
11
Q5
10
(No.22041)1-43
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