JVC MX-GT91R Service Manual page 38

MX-GT91R
BU2092/F(IC811):PORT EXPANDER
1.Terminal 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
1-38
Symbol
I/O
Vss -
DATA I
CLOCK I
LCK I
Q0~Q11 O
OE I
Vdd -
CONTROL
CIRCUIT
Function
Connect to GND
Serial Data input
Shift Clock of Data
Latch Clock of Data
Parallel Data Output
Latch Data L
OUTPUT ON
Output Enable
Power Supply
Vdd
18
OE
17
Q11
16
Q10
15
Q9
14
Q8
13
Q7
12
Q6
11
Q5
10
H
OFF