LG122324
122 x 32 dots
Built in 8192 Chinese Fonts
ABSOLUTE MAXIMUM RATINGS
Item
Supply Voltage(Logic)
Supply Voltage(LCD)
Input Voltage
Operating Temp.
Storage Temp.
Symbol
V
DD
- V
SS
V
O
- V
SS
V
I
T
opr
T
stg
Min.
-0.3
-0.3
-0.3
-20
-30
Max.
7.0
7.0
V
DD
+ 0.3
70
80
Unit
V
V
V
C
MECHANICAL DATA
Item
Module Size ( W x H x T )
Viewing Area ( W x H )
Dot Pitch ( W x H )
Dot Size ( W x H )
Weight (Reflective/LED)
Nominal Dimensions
74.0 x 40.0 x 9.5/13.5
60.5 x 18.5
0.44 x 0.49
0.40 x 0.45
Approx. 28 / 38
Unit
mm
mm
mm
mm
g
C
ELECTRICAL CHARACTERISTICS ( V
DD
=5V 0.25V )
Item
Input High Voltage
Input Low Voltage
Output High Voltage
Output Low Voltage
Supply Current
LCD Driving Voltage
Symbol
V
IH
V
IL
V
OH
V
OL
I
DD
V
O
- V
SS
Test
Condition
--
--
Min.
Typ.
--
--
--
--
3.0
6.5
Max. Unit
V
DD
0.6
V
DD
0.4
5.0
--
V
V
V
V
mA
V
芒
PIN CONNECTIONS
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Symbol
V
SS
V
DD
NC
RS
(CS)
R/W
(SID)
E(SCLK)
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
PSB
/RST
LEDA
LEDK
Level
0V
+5V
--
H/L
H/L
_
H,H >L
H/L
H/L
H/L
H/L
H/L
H/L
H/L
H/L
H/L
L
+5V
0V
Function
GND
Supply Voltage for Logic
No connection
H : Data L : Instruction code
(Chip enable for serial mode)
H : Read L : Write
(Serial data for serial mode)
Enable (Clock for serial mode )
0.7V
DD
- 0.3
OH
= - 0.1mA 0.8V
DD
I
0
I
OL
= 0.1mA
--
V
DD
= 5.0V
--
Ta=25 C
BLOCK DIAGRAM
V
SS
V
DD
RS(CS)
R/W(SID)
E(SCLK)
/RST
PSB
DB0
DB7
LCD
Controller
LSI
ST7920
32 COM
LCD PANEL
122 x 32 dots
Data bus line
64 SEG
58 SEG
H: Parallel mode L: Serial mode
Reset signal, active "L"
Power supply for LED backlight
ST7921
LED BACKLIGHT SPECIFICATIONS (Ta=25 C)
LEDA
LEDK
Item
LED Backlight
Forward Voltage
Forward Current
Emission Wave Length
Symbol
V
f
I
f
Typ.
4.1
120
568
Max.
4.3
--
--
Unit
V
mA
nm
位
p
1
