LG MBD-D102X Service Manual page 54

9-3. PIN DESCRIPTION
Pin Name I/O
CLK
DIN
STB
DOUT
K1 to K2
OSC
GND
VDD
SG1/KS1 to
SG16/KS16
SG17 to SG24
GR1 to GR16
VEE
Clock input pin
I This pin reads serial data at the rising edge and outputs data at
the falling edge.
Data input pin
I
When this pin acts as input pin, serial data is inputted at the
rising 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.
Data output pin (N-channel, Open-drain)
O When this pin acts as output pin, serial data is outputted at the
falling edge of the shift clock (starting from the lower bit)
Key data input pins
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
O
Also acts as the key source
O High-voltage segment output pins
O High-voltage grid output pins
-
Pull-down level
Description
3-43
Pin No.
1
2
3
4
5, 6
7
8, 52
9, 51
10 to 25
26 to 33
34 to 49
50