LG FB163U Service Manual page 30

9. PT6324
• PIN DESCRIPTION
Pin Name I/O
CLK
DIN/DOUT I/O
STB
LED1 O
K1 to K2
OSC
GND
VDD
SG1/KS1 to
O
SG16/KS16
SG17 to SG24 O
GR1 to GR16 O
VEE
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Clock Input Pin
I This pin reads serial data at the rising edge and outputs data at
the falling edge.
Data Input Pin/Data Output pin (N-Channel, Open-Drain)
When this pin acts as input pin, serial data is inputted at the
rising edge of the shift clock (starting from the lower bit)
When this pin acts as output pin, serial data is outputted at the
falling edge of the shift clock (starting from the lower bit)
Serial Interface Strobe Pin
I The data input after the STB has fallen is processed as a
command. When this in is ìHIGHî, CLK is ignored.
LED Output Pin
Key Data Input Pins
I The data inputted to these pins is latched at the end of the
display cycle.
Oscillator Input Pin
I A resistor is connected to this pin to determine the oscillation
frequency.
- Ground Pin
- Logic Power Supply
High-Voltage Segment Output Pins
Also acts as the key source
High-Voltage Segment Output Pins
High-Voltage Grid Output Pins
- Pull-Down Level
Description
3-17
Pin No.
1
2
3
4
5, 6
7
8, 52
9, 51
10 to 25
26 to 33
34 to 49
50
LGE Internal Use Only