JVC MX-GT98V Service Manual page 48

MX-GT98V/MX-GT95V/MX-GT88V
MX-GT85V/MX-G78V/MX-G75V
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
BA3126N (IC301) : R/P switch
1-48
CONTROL
CIRCUIT
Symbol
I/O
Vss -
DATA I
CLOCK I Shift Clock of Data (Rise Edge Trigger)
LCK I Latch Clock of Data (Rise Edge Trigger)
Q0~Q11 O Parallel Data Output (Nch Open Drain FET)
OE I Output Enable (Output FET "H" Level is OFF)
V -
DD
1 2 3 4
V
18
DD
OE
17
Q11
16
Q10
15
Q9
14
Q8
13
Q7
12
Q6
11
Q5
10
Function
GND
Serial Data input
Latch Data L
OUTPUT ON OFF
Power Supply
5 6 7 8
H
9