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