JVC HX-Z1R Service Manual page 31

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Description of major ICs
BU2092 (IC642) : Port expander
1.Pin Layout
1
Vss
DATA
2
CLOCK
3
LCK
4
Q0
5
Q1
6
Q2
7
Q3
8
Q4
9
2.Pin function
Pin No.
1
2
3
4
5~16
17
18
CONTROL
CIRCUIT
Symbol
I/O
Vss - Connect to GND
DATA I Serial Data input
CLOCK I Shift Clock of Data
LCK I Latch Clock of Data
Q0~Q11 O Parallel Data Output
Latch Data
OUTPUT
OE I Output Enable
Vdd - Power Supply
Digitized in Heiloo Netherlands
Vdd
18
OE
17
16 Q11
Q10
15
Q9
14
13 Q8
Q7
12
Q6
11
10 Q5
Function
L H
ON OFF
3/29/2018
HX-Z1R
1-31