DD
0.4
5.0
--
DD
0.6
Max.
64 SEG
Input Voltage V-0.3 + 0.3V
ELECTRICAL CHARACTERISTICS
LSI
Controller
ST7920
LCD
RS(CS)
LEDK
DB7
LEDA
E(SCLK)
R/W(SID)
DB0
/RST
PSB
BLOCK DIAGRAM
Output Low Voltage
LCD Driving Voltage
Supply Current
SS
VDD
V
Storage Temp.
Operating Temp.
Output High Voltage
Input Low Voltage
Input High Voltage
Item
LED Backlight
64 SEG
ST7921
= 0.1mA
= - 0.1mA
-20
( V
-30
OL
VI
OL
V
- V
I
VO
DD
SS
32 COM
Ta=25
= 5.0V
DD C
I
OH
Symbol
V
VIL
VIH
stg
opr
T
I
T
--
--
Condition
Test
OH 0--
160 x 32 dots
LCD PANEL
--
-- 3.0
6.0
=5V
â
0.25V )
0.7V
0.8V
- 0.3
Min.
DD
DD
DD
--
--
--
Typ.
V
V
70
80
DD
ABSOLUTE MAXIMUM RATINGS
LG128321
Supply Voltage(LCD)
Supply Voltage(Logic)
Item
-0.3
-0.3
Min.
SS
SS
Symbol
O
DD
V
V- V
- V 7.0
7.0
Max.
128 x 32 dots
Dot Pitch ( W x H )
V0. 52 x 0.52 mm
Data bus line
Reset signal, active "L"
H: Parallel mode L: Serial mode
Power supply for LED backlight
LED BACKLIGHT SPECIFICATIONS (Ta=25
No connection
(Serial data for serial mode)
(Chip enable for serial mode)
Enable (Clock for serial mode )
H : Read
H : Data
Power supply for logic
Approx. 35 / 50
0. 48 x 0.48
Forward Voltage
Emission Wave Length
Forward Current
LEDA
LEDK
DB7
/RST
PSB
DB6
18
Item
15
17
16
14
13
f
I
λp
+5V
H/L
0V
L
H/L
H/L
Symbol
Vf
DB4
DB5
SS
(SID)
DB1
DB3
DB2
E(SCLK)
DB0
RS
(CS)
R/W
NC
DD
Weight (Reflective/LED)
Dot Size ( W x H )
PIN CONNECTIONS
Symbol
4
V
mA
V
7
10
11
12
9
8
5
6
Unit
V
V
V
C
C
3
2
1
Pin
V
V
>L
H/L
H/L
H/L
H/L
H/L
H/L
H/L
H,H_
H/L
Level
+5V
0V
--
GND
V
nm
mA
Unit
120 --
568 --
4.1
Typ. Max.
4.3
C)
mm
L : Instruction Code
L : Write
Function
g
84.0 x 44.0 x 10.0/14.5
Nominal Dimensions
70.0 x 20.0
Built in 8192 Chinese Fonts
MECHANICAL DATA
Viewing Area ( W x H )
Module Size ( W x H x T )
Item
V
Unit
Vmm
mm
Unit
